Organization and Staff (December 2020)
Director

Dr. TANAKA Manabu

1. Research Division of Materials Joining Process
1) Energy Control of Processing
Professor
Guest Professor
Guest Professor
Guest Professor
Associate Professor
Specially Appointed Associate Professor
Guest Associate Professor
Assistant Professor
Guest Academic Staff

Dr. TANAKA Manabu
Dr. NAKATA Kazuhiro
Dr. MITA Tsuneo
Dr. NISHIYAMA Hideya
Dr. SHIGETA Masaya
Dr. LI Fang
Dr. HOSOI Koichi
Dr. TASHIRO Shinichi
Dr. XU Bin

2) Energy Transfer Dynamics
Professor
Guest Professor
Associate Professor
Assistant Professor
Guest Academic Staff

Dr. SETSUHARA Yuichi
Dr. ONO Kouichi
Dr. TAKENAKA Kousuke
Dr. TOKO Susumu
Dr. UCHIDA Giichiro

3) Manufacturing Process
Professor
Specially Appointed Researcher
Specially Appointed Researcher
Guest Researcher
Guest Researcher

Dr. NISHIKAWA Hiroshi
Mr. SASAKI Kishichi
Dr. NAOE Takuya
Mr. KOHINATA Shigeru
Dr. ZHANG Ning

4) Laser Materials Processing
Professor
Associate Professor
Specially Appointed Researcher
Specially Appointed Researcher
Specially Appointed Researcher
Specially Appointed Researcher
Specially Appointed Researcher

Dr. TSUKAMOTO Masahiro
Dr. SATO Yuji
Ms. HIGASHINO Ritsuko
Mr. MASUNO Shinichiro
Mr. HORI Eiji
Mr. YOSHIDA Norio
Mr. TAKENAKA Keisuke

5) Advanced Engineering Science
Guest Professor

Dr. MUTO Izumi

2. Research Division of Materials Joining Mechanism
1) Welding Mechanism
Professor
Guest Professor
Associate Professor
Associate Professor (Supplementary Assignment)
Assistant Professor

Dr. ITO Kazuhiro
Dr. OGAWA Kazuhiro
Dr. MIKAMI Yoshiki
Dr. TAKAHASHI Makoto
Dr. YAMAMOTO Hajime

2) Joint Interface Structure and Formation Mechanism
Professor
Specially Appointed Professor
Guest Professor
Associate Professor
Specially Appointed Associate Professor
Specially Appointed Associate Professor
Assistant Professor
Specially Appointed Researcher
Specially Appointed Researcher
Specially Appointed Researcher
Guest Researcher
Guest Researcher

Dr. FUJII Hidetoshi
Dr. USHIODA Kohsaku
Dr. NAGIRA Tomoya
Dr. LIU Huihong
Dr. MORISADA Yoshiaki
Dr. AOKI Yasuhiro
Dr. YAMASHITA Takayuki
Mr. KAMAI Masayoshi
Dr. CHOI Jeongwon
Mr. KAWAKUBO Takumi
Dr. CHENG Chun
Dr. SHARMA Abhisek3) Composite Materials Processing
Professor
Guest Professor
Guest Professor
Associate Professor
Assistant Professor
Specially Appointed Researcher
Specially Appointed Researcher
Specially Appointed Researcher

Dr. KONDOH Katsuyoshi
Dr. MA Qian
Dr. MIURA Hideshi
Dr. UMEDA Junko
Dr. SHITARA Kazuki
Mr. HORIE Mitsuo
Ms. FUJII Hiroko
Mr. MINAMITANI Ryoji

3. Research Division of Materials Joining Assessment
1) Joining Mechanics and Analyses
Professor
Associate Professor
Assistant Professor
Specially Appointed Researcher

Dr. MA Ninshu
Dr. SERIZAWA Hisashi
Dr. GENG Peihao
Dr. NARASAKI Kunio2) Structural Integrity and Failure Assessments
Professor (Supplementary Assignment)

Dr. INOUE Hiroshige

3) Joining Design and Dependability
Associate Professor
Specially Appointed Associate Professor
Specially Appointed Researcher
4) Reliability Evaluation & Simulation
Professor
Associate Professor
Assistant Professor
4. Smart Processing Research Center
Director, Professor
1) Smart Coating Processing
Professor
Guest Associate Professor
Assistant Professor
Specially Appointed Researcher

Dr. TSUTSUMI Seiichiro
Dr. FINCATO Riccardo
Dr. GADALLAH Ramy Saeed
ShafeakDr. INOUE Hiroshige
Dr. KADOI Kota
Dr. HOU Yuyang
Dr. FUJII Hidetoshi
Dr. NAITO Makio
Dr. KAMITANI Masataka
Dr. KOZAWA Takahiro
Dr. KONDO Akira

2) Nano/Micro Structure Control
Professor

Dr. KIRIHARA Soshu

3) Smart Green Processing
Professor (Supplementary Assignment)
Associate Professor (Supplementary Assignment)

Dr. NISHIKAWA Hiroshi
Dr. ABE Hiroya

4) Life-Innovation Materials Processing
Associate Professor

Dr. ABE Hiroya

5. Joint Interface Microstructure Characterization Room
Associate Professor

Dr. TAKAHASHI Makoto

6. JFE Welding Research Alliance Laboratories
Director, Professor (Supplementary Assignment)
Guest Professor
Guest Professor
Professor (Supplementary Assignment)
Professor (Supplementary Assignment)
Professor (Supplementary Assignment)
Professor (Supplementary Assignment)
Associate Professor (Supplementary Assignment)
Associate Professor (Supplementary Assignment)
Associate Professor (Supplementary Assignment)
Associate Professor (Supplementary Assignment)
Associate Professor (Supplementary Assignment)

Dr. TANAKA Manabu
Dr. OI Kenji
Dr. TAGAWA Tetsuya
Dr. MINAMI Fumiyoshi
Dr. FUJII Hidetoshi
Dr. ITO Kazuhiro
Dr. TSUKAMOTO Masahiro
Dr. SHIGETA Masaya
Dr. SATO Yuji
Dr. MIKAMI Yoshiki
Dr. TSUTSUMI Seiichiro
Dr. KADOI Kota

7. DAIHEN Welding and Joining Research Alliance Laboratories
Professor (Supplementary Assignment)
Dr. INOUE Hiroshige
Professor (Supplementary Assignment)
Dr. TANAKA Manabu
Guest Professor
Dr. ERA Tetsuo
Specially Appointed Professor
Dr. ASAI Satoru
Professor (Supplementary Assignment)
Dr. TSUKAMOTO Masahiro
Guest Researcher
Dr. KADOTA Keiji
8. Hitachi Zosen Advanced Welding Technology Joint Research Chair
Guest Professor
Dr. KITAGAWA Akikazu
Guest Professor
Dr. NAKATANI Mitsuyoshi
Guest Professor
Dr. KATAYAMA Seiji
Guest Professor
Dr. MINAMI Fumiyoshi
Professor (Supplementary Assignment)
Dr. TANAKA Manabu
Professor (Supplementary Assignment)
Dr. TSUKAMOTO Masahiro
Specially Appointed Associate Professor
Dr. YAMAZAKI Yosuke
Associate Professor (Supplementary Assignment)
Dr. SHIGETA Masaya
Specially Appointed Assistant Professor
Mr. ABE Yohei
Guest Researcher
Dr. TANIGAWA Daichi
Guest Researcher
Mr. FUJIMOTO Takahiro
9. Osaka Fuji "Advanced Functional Processing" Joint Research Chair
Specially Appointed Professor
Dr. ABE Nobuyuki
Professor (Supplementary Assignment)
Dr. TSUKAMOTO Masahiro
Associate Professor (Supplementary Assignment)
Dr. SATO Yuji
Specially Appointed Assistant Professor
Mr. HAYASHI Yoshihiko
Specially Appointed Assistant Professor
Mr. AZUMI Kazuyuki
Specially Appointed Researcher
Mr. MIZUTANI Masami
Guest Researcher
Mr. TATSUMI Yoshihiro
10. Advanced Joining Technology Joint Research Chair
Guest Academic Staff
Guest Academic Staff
Guest Academic Staff
Guest Academic Staff
Guest Academic Staff

Mr. OTANI Yasuhiro
Mr. NOGI Toshikatsu
Mr. KATUKI Makoto
Mr. YANO Yoshiaki
Mr. MURAYAMA Masatoshi

11. Development Base on Creation of Life Innovation Materials for Interdisciplinary
and International Researcher Development
Leader, Professor
Dr. SETSUHARA Yuichi
Specially Appointed Professor
Dr. OHARA Satoshi
12. Center to Create Research and Educational Hubs for Innovative Manufacturing in
Asia / "Division of International Collaboration Research" and"Division of Global Human Resource Development"
Leader, Professor (Supplementary Assignment)
Dr. KONDOH Katsuyoshi
Leader, Professor (Supplementary Assignment)
Dr. NISHIKAWA Hiroshi
Specially Appointed Associate Professor
Ms. KATSUMATA Mihoko
Specially Appointed Associate Professor
Ms. HASHIMOTO Chie
Specially Appointed Assistant Professor
Ms. TERANISHI Misa
Specially Appointed Assistant Professor
Dr. BAHADOR Abdollah
Specially Appointed Assistant Professor
Dr. MA Yunwu
13. R&D Project for Environmental Resources and ECO Joining
Specially Appointed Professor
Dr. TAKAHASHI Yasuo
Gest Professor
Dr. UCHIDA Shigeaki
Gest Professor
Dr. ITAKURA Keijirou
Gest Associate Professor
Dr. HIRAKI Hirohisa
Specially Appointed Researcher
Dr. MURAMATSU Masayasu
14. Global Collaborative Research Center for Computational Welding Science (CCWS)
Leader, Professor (Supplementary Assignment)
Dr. MA Ninshu
Guest Professor
Dr. MURAKAWA Hidekazu
Guest Professor
Dr. HIRAOKA Kazuo
Guest Professor
Dr. MATSUYAMA Kinichi
Guest Professor
Dr. YASUKI Tsuyoshi
Associate Professor (Supplementary Assignment)
Dr. SERIZAWA Hisashi
Guest Associate Professor
Dr. SHIBAHARA Masakazu
15. International Research Center for Fatigue Design of Weld Structures(FDWS)
Leader, Professor (Supplementary Assignment)
Dr. FUJII Hidetoshi
Guest Professor
Dr. TERADA Kenjiro
Associate Professor (Supplementary Assignment)
Dr. TSUTSUMI Seiichiro
Specially Appointed Associate Professor
Dr. FINCATO Riccardo(Supplementary Assignment)
16. Industry Cooperation Office
Professor (Supplementary Assignment)
Visiting Professor

Dr. SETSUHARA Yuichi
Dr. SUGA Tetsuo

Transactions of JWRI, Vol.49, 2020
CONTENTSRESEARCH ACTIVITIES OF JWRI
Research Division of Materials Joining Process
Dep. of Energy Control of Processing ………………………………………………………………………….

1

Dep. of Energy Transfer Dynamics ……………………………………………………………………………….

2

Dep. of Manufacturing Process ……………………………………………………………………………………

3

Dep. of Laser Materials Processing ……………………………………………………………………………… 4
Research Division of Materials Joining Mechanism
Dep. of Welding Mechanism ……………………………………………………………………………………….. 5
Dep. of Joint Interface Structure and Formation …………………………………………………………. 6
Dep. of Composite Materials Processing …………………………………………………………………….. 7
Research Division of Materials Joining Assessment
Dep. of Joining Mechanics and Analyses …………………………………………………..……….…….….. 8
Dep. of Structural Integrity and Failure Assessments …………………..………………….…………… 9
Dep. of Joining Design and Dependability ……………………………….…………………..……………… 10
Dep. of Reliability Evaluation & Simulation ………………………………………………….………………. 11
Smart Processing Research Center
Dep. of Smart Coating Processing …………………………………………………..…………….………….….. 12
Dep. of Nano/Micro Structure Control …………………………………………………..…………..….….….. 13
Dep. of Smart Green Processing ……………………………………………………….………………..………... 14
Dep. of Life-Innovation Materials Processing …………………………………….…………….….…….…. 15
Hitachi Zosen Advanced Welding Technology Joint Research Chair ………………….…………..… 16
Osaka Fuji "Advanced Functional Processing" Joint Research Chair ………………………..…….…. 17
Development Base on Creation of Life Innovation Materials for Interdisciplinary
and International Researcher Development ………………………………………………………………..…... 18
Center to Create Research and Educational Hubs for Innovative Manufacturing in Asia /"Division of International Collaboration Research" and"Division of Global Human Resource Development" …………………………………………..…………… 19
R&D Project for Environmental Resources and ECO Joining ……………………………….....………... 20

CONTRIBUTION TO OTHER ORGANIZATIONS ………………………………………..….….….……. 21

Research Division of Materials Joining Process, Dep. of Energy Control ofProcessing
Research summary
The main research subject is the development of the high density energy source for processing
advanced materials having special functions and properties. We undertake fundamental
investigations of the properties of the high energy source interacting with materials, and we study
advanced control techniques for optimizing the energy transport.
Major emphasis is placed on the generation, control and energy transport in arc plasmas, which
are a high density energy source which have been applied to a variety of materials processing
techniques such as welding, cutting, heating, high temperature processing, surface modificationand the creation of powders.

Research subjects(1) Generation and control of thermal plasmas, and their application to welding and joining
processes(2) Arc physics, molten pool behavior, and transport theory in fusion welding(3) Development of new arc electrodes based on the analysis of electrode-plasma interaction(4) Development of advanced high quality clean welding processes(5) Development of new generation welding and joining processes employing atmospheric pressureplasma(6) Control of arc discharge in lighting and electrical devices

Optical measurement of electron density and plasma
temperature during spray transfer and globular transfer in gas
metal arc welding process ((a) Electron density, (b) Spraytransfer, (c) Globular transfer). An addition of CO2 into shielding
gas causes constriction of arc current toward the arc axis, whichleads to globular transfer due to increase in arc pressure.

Numerical simulation on effects of constricted nozzle on arc phenomena in TIG
welding process ((a) Temperature distribution in conventional TIG welding, (b)Temperature distribution in TIG welding with a constricted nozzle, (c) Heat flux
to the anode surface). In TIG welding with a constricted nozzle, arc temperature
increases due to constriction of arc. Consequently, larger heat flux to the anodesurface is obtained compared with that of conventional TIG welding.

Major Papers

K. Tanaka, M. Shigeta, M. Tanaka and A. B. Murphy, "Investigation of Transient Metal Vapour Transport
Processes in Helium Arc Welding by Imaging Spectroscopy", J. Phys. D-Appl. Phys., 53, 42 (2020), 425202(8pp).
D. Wu, S. Tashiro. Z. Wu, K. Nomura, X. Hua, M. Tanaka, "Interactive Phenomena in Hybrid KPAW-GMAW ",Weld. J., 99 (2020), 146-s-155-s.
S. Maenaka, S. Tashiro, A. B. Murphy, K. Fujita and M. Tanaka, "Investigation of the Influence of Buoyancy on
Gas Convection of a Horizontal Xenon Short Arc Lamp through 3D Numerical Simulation”, J. Phys. D-Appl.
Phys., 53 (2020), 85205(17pp).
S. Tashiro, N. Mukai, Y. Inoue, A. B. Murphy, T. Suga and M. Tanaka, " Numerical Simulation of the Behavior of
Hydrogen Source in a Novel Welding Process to Reduce Diffusible Hydrogen ", Materials, 13 (2020), 1619
(18pp).

1

Research Division of Materials Joining Process, Dep. of Energy Transfer Dynamics
Research summary
Our research activities encompass works on development of process control technologies of
surface and interface for advancement of materials joining science and processing technologies
through creation of novel process-energy sources (plasmas and particle beams), and span the range
of applications from to functionalization of materials to their process control. These research
activities are based on fundamental studies on energy transfer dynamics involved in a variety ofmaterials processing with process-energy sources.

Research subjects(1) Development of novel plasma sources and particle beams for advanced process technologies(CVD, PVD)
(2) Development of novel large-area, low-damage and high-density plasma sources for advanced
process control of functional materials(3) Development of novel large-area, low-damage and high-density plasma sources for advanced
process control of functional materials(4) Creation of softmaterial processing science for development of advanced green
nanotechnologies with inorganic/organic flexible hybrid structures(5) Studies on temporal and spatial control of discharge for development of innovative plasma
sources for plasma medicine

Development of innovative plasma source for plasma medicine(a) ICCD images of atmospheric RF plasmas(b) Frequency dependence of discharge breakdown voltage(c) Frequency dependence of O optical emission intensity

Low-damage and ultra-large-area plasma source withmultiple low inductance antenna modules

Major Papers
T. Kawasaki, K. Nishida, G. Uchida, F. Mitsugi, K. Takenaka, K. Koga, Y. Setsuhara and M. Shiratani, “Effects ofSurrounding Gas on Plasma-Induced Downward Liquid Flow”, Jpn. J. Appl. Phys., 59 (2020), SHHF02/1SHHF02/6.
K. Takenaka and Y. Setsuhara, “Formation of Functional Oxide Thin Films Using Plasma-Assisted Reactive
Process”, J. Jpn. Weld. Soc., 89, 7 (2020), 472-475.
G. Uchida, J. Ikeda, K. Takenaka and Y. Setsuhara, “Visualization Study on Interaction Between Nonequilibrium
Atmospheric Pressure He Plasma Jet and Liquid Solution”, J. Smart Process., 9, 3 (2020), 90-96.
K. Takenaka, Y. Setsuhara, G. Uchida and A. Ebe, “Paradigms Explored with Non-Equilibrium Plasmas -FromThin Film Transistor Formation to Medical Treatment and Joining of Dissimilar Materials-”, Manuf. Technol.,72, 4 (2020), 15-19.
K. Inoue, S. Takahashi, N. Sakakibara, S. Toko, T. Ito and K. Terashima, “Spatiotemporal Optical Emission
Spectroscopy to Estimate Electron Density and Temperature of Plasmas in Solution”, J. Phys. D: Appl. Phys.,53, 23 (2020) 235202.

2

Research Division of Materials Joining Process, Dep. of Manufacturing Process
Research summary
The main research objectives are to analyze the mechanisms of material process including joining
by various energy sources, and to develop advanced processes with high efficiency and highproductivity. Especially, for a micro joining process in electronics packaging, the creation of thefunctional joint materials, the development of novel advanced micro processes by various energy
sources, and the enhancement of the highly reliable joints based on the control of interfacial
structure and performance are performed to produce micro joints with superb functionality andhigh reliability. In addition, we are resolving the joining problems of newly-developed materials.
And we are aiming to develop new appropriate material processes for these materials.

Research subjects(1) Development and evaluation of advanced micro joining process(2) Elucidation of micro joining phenomena and defect suppression(3) Control and analysis of microstructure at soldered interface(4) Development of eco-friendly fluxless soldering process using a reducing atmosphere(5) Formation of high heat-resistance joint using three-dimensional nanostructure

Micro joining process using a transient liquid phase bonding (TLPB)
method(a)TLPB process and microstructure of joint using Sn-coated Cu particles(b)TLPB process and microstructure of joint using Sn-Bi solder particles +Cu particles

Microstructure of sintered joint using Ag nanoparticle paste(a)Serial sectioning of Ag sintered layer by FIB/SEM system(b)Reconstructed 3D image of Ag sintered layer(c)Reconstructed 3D pore distribution into Ag sintered layer

Major Papers

S. He, R. Gao, J. Li, Y.-A. Shen and H. Nishikawa, “In-situ Observation of Fluxless Soldering of Sn-3.0Ag0.5Cu/Cu under a Formic Acid Atmosphere”, Mater. Chem. Phys., 239 (2020), 122309.
S. Koga, H. Nishikawa, M. Saito and J. Mizuno, “Fabrication of Nanoporous Cu Sheet and Application to
Bonding for High-Temperature Applications”, J. Electronic Mater., 49, 3 (2020), 2151-2158.
D. L. Han, Y.-A. Shen, S. Jin and H. Nishikawa, “Microstructure and Mechanical Properties of the In-48SnxAg Low-Temperature Alloy”, J. Mater. Sci., 55 (2020), 10824-10832.
O. Mokhtari and H. Nishikawa, “Effect of Surface Potential Distribution on Corrosion Behavior of Cu/AlInterface in Cu Wire Bonding Applications”, Microelectronics Reliability, 113 (2020), 113942.

3

Research Division of Materials Joining Process, Dep. of Laser Materials Processing
Research summary
Fundamental studies are performed concerning welding, joining, cutting, surface modification
and removal processing with laser beams, aimed at advanced fusion between laser science andproduction engineering. We focus on clarification of welding or joining mechanisms on the basis of
the visualization of material processing phenomena with high-speed optical observation or X-ray
transmission imaging techniques. Moreover, laser should be utilized with not only high thermal
efficiency but also physicochemical effects induced by interaction between light and material. Thus
we create innovative processes including laser direct joining of metal and plastic, put theseprocesses to practical use and disseminate achievements of our research to the world.

Research subjects(1) Development and evaluation of joining and welding processes for the advanced functional
materials(2) Development of additive manufacturing technologies with blue diode laser(3) Creation of new function by surface modification with laser(4) Fundamental studies on laser interaction with materials and fundamental studies of materials
processing utilizing laser

PMMA film surface after femtosecond laser irradiation.
(a) SEM image with periodic nanostructures oriented to thedirection perpendicular to the laser polarization vector (The periodof the periodic nanostructure is about 230nm) on PMMA film
surface.
(b) Fluorescence microscope image of cell cultivation test. Cells
adhered to the periodic nanostructures surface rather than baresurface.

Copper cladding using blue diode laser (a)Blue diodelaser (b) X ray observation of laser coating with blue
laser (c) Cross section image (d) Surface image of purecopper coating layer (e) 3D object of pure copper byBlue diode laser

Major Papers
Y. Sato, S. Srisawadi, D. Tanprayoon, T. Suga, T. Ohkubo and M. Tsukamoto, “Spatter Behavior for 316L
Stainless Steel Fabricated by Selective Laser Melting in a Vacuum”, Opt. Lasers Eng., 134 (2020), 106209.
D. Tanprayoona, S. Srisawadi, Y. Sato, M. Tsukamoto and T. Suga,"Microstructure and Hardness Response ofNovel 316L Stainless Steel Composite with TiN Addition Fabricated by SLM”, Opt. Laser Technol., 129 (2020),
106238.
K. Ono, Y. Sato, R. Higashino, Y. Funada, N. Abe and M. Tsukamoto,"Pure Copper Rod Formation by Multibeam
Laser Metal Deposition Method with Blue Diode Lasers”, J. Laser Appl., 33, 1 (2020), 012013.

4

Research Division of Materials Joining Mechanism, Dep. of Welding Mechanism
Research summary
Mechanisms controlling the joint performance of structural and functional materials, which obtainedby fusion welding, liquid-state/solid-state bonding, and solid-state bonding, are metallographicallycharacterized to establish a scientific basis to produce joint materials featuring superior performance.
The microstructures of the weld-deposited metal, the heat-affected zone of fusion-welded joints, andthe interfacial region of solid-state bounded joint are thoroughly investigated utilizing various methods
such as X-ray diffraction, electron-microscopy observation, elementary analysis, EBSP analysis, andnumerical modeling and simulation. Formation processes of the microstructures and their relation to
joint performance are discussed from the material scientific viewpoint.

Research subjects(1) Weld microstructure analyses of structural material such as steel(2) Bonding mechanism of solid-state joining of metals and ceramics, and its application to microstructural control(3) Application of welding and joining phenomena to development of advanced materials(4) Synthesis of new functional materials at welding and joining interface(5) Evaluation of the effect of microstructure on mechanical behavior of structural materials joints
400

(c)

300

(d)

W-rich layer

0.1

/ MPa

RS
AS

(b)

Stress ratio:(e)Stress amplitude,

(a)

200

50%UP
FSPed
As-welded

100
10000
104

100000105

1000000
106

Number of cycles to failure,

10000000
107(Cycles)

Welding-time variation of penetration shape change in thesimulated vibration assisted tandem-pulsed GMAW using
the Flow-3D commercial software in the presence of sinevibration parallel to the welding direction (250 Hz) and thesurface tension active elements..

Geometry modification and W-rich layer formation for weld
toe of high-strength low-alloy steel joints using friction stirprocessing (FSP) with spherical-tip WC tool, resulting in
fatigue strength improvement.

Designing high bending strength Nb/Cu and Ta/Cu clads
produced by explosive welding (EW) with high microhardness intermediate layers (ILs) at their interfaces.

Cracks observed in hydrogen charged weld metal after
slow strain rate tensile test (a), and numerical simulationof diffusible hydrogen concentration distribution in weld
metal (b).

Major Papers
H. H. Zargari, K. Ito, M. Kumar, A. Sharma, “Visualizing the Vibration Effect on the Tandem-Pulsed Gas Metal
Arc Welding in the Presence of Surface Tension Active Elements”, Int. J. Heat Mass Transf., 161 (2020), 120310.
H. H. Zargari, K. Ito, T. Miwa, P. K. Parchuri, H. Yamamoto and A. Sharma," Metallurgical Characterization of
Penetration Shape Change in Workpiece Vibration-Assisted Tandem-Pulsed Gas Metal Arc Welding”, Materials,
13 (2020) 3096.
H. Yamamoto, Y. Aoyama, K. Ito, T. Yamada, M. Tanaka, H. Hoshikawa, A. Nagata and T. Kumagai,"Friction Stir
Welding of Ultrahigh-Purity Aluminum Thin Sheets Never to Lower High Conductivity at Ultra-Low
Temperature”, Q. J. Jpn. Weld. Soc., 38, 4 (2020), 253-262.
G. Ogita, K. Matsumoto, M. Mochizuki, Y. Mikami and K. Ito," Numerical Simulation on Effect of Microstructure
on Hydrogen-induced Cracking Behavior in Duplex Stainless Steel Weld Metal”, Tetsu-to-Hagane, 106, 4 (2020),
224-234.
G. Ogita, K. Matsumoto, M. Mochizuki, Y. Mikami and K. Ito," Evaluation of Hydrogen-induced Cracking
Behavior in Duplex Stainless Steel by Numerical Simulationof Stress and Diffusible Hydrogen Distribution at
the Microstructural Scale”, Tetsu-to-Hagane, 106, 4 (2020), 214-223.

5

Research Division of Materials Joining Mechanism, Dep. of Joint Interface
Structure and Formation Mechanism
Research summary
In this department, based on the elucidation of the various phenomena at the joint interfaces offerrous, nonferrous, non-metal materials at both macroscopic and microscopic levels, the interface
formation mechanisms during various joining processes are clarified to create new interface control
methods.
In addition, novel welding and modification processes are developed, mainly based on fusion
welding methods and friction welding methods such as the friction stir welding, rotary friction
welding and linear friction welding methods, which is the core of the fundamental technologies
having a great potential to produce new values. These developments are going to be used andfocused simultaneously in our society in order to create a new research field and elevate thecontinuous growth of industrial competitiveness of our country.

Research subjects(1) Control of interface and elucidation of formation mechanism during friction welding (FSW,Friction welding, Linear friction welding)(2) Development of novel joining and modification processes(3) Elucidation of formation mechanism of weld interface and molten pool
(4) Analysis of joint interface structure(5) Control of solid-liquid interface formation

Three-dimensional visualization of the material flow using a W
tracer during the FSW.

SEM microstructures and Vickers hardness along the central
axis of LFWed joints.

Major Papers
M. Zhou, Y. Sun, Y. Morisada, K. Ushioda and H. Fujii, “Quasi-in-situ Investigation into the Microstructure andTexture Evolution of Pure Magnesium during Friction Stir Welding”, J. Magnes. Alloy., 8, 4 (2020), 1071-1083.
Y. Hu, H. Liu, H. Fujii, H. Araki, K. Sugita and K. Liu, “Ultrasonic-induced Excess Vacancies in Friction Stir
Processing and Exploration of Acoustoplastic Effect”, Scr. Mater., 185 (2020), 117-121.
J. W. Choi, Y. Morisada, H. Liu, K. Ushioda, H. Fujii, K. Nagatsuka and K. Nakata, “Dissimilar Friction Stir Weldingof Pure Ti and Carbon Fibre Reinforced Plastic”, Sci. Technol. Weld. Joining, 25, 7 (2020), 600-608.
Y. Sun, H. Fujii and Y. Morisada, “Double-sided Friction Stir Welding of 40 mm Thick Low Carbon Steel Plates
Using a PcBN Rotating Tool”, J. Manufacturing Processes, 50 (2020), 319-328.
H. Liu, Y. Aoki, Y. Aoki, K. Ushioda and H. Fujii, “Principle for Obtaining High Joint Quality in Dissimilar Friction
Welding of Ti-6Al-4V Alloy and SUS316L Stainless Steel”, J. Mater. Sci. Technol., 46 (2020), 211-224.

6

Research Division of Materials Joining Mechanism, Dep. of Composite Materials
Processing
Research summary
From a viewpoint of the energy saving and environmental problem solutions, the research fieldsof this department focus on both of the effective reuse of resources and energy including renewable
ones and reduction of life hazardous materials and air pollutions. In particular, by controlling theinterfacial mechanics and high-performance of materials, atomic/nano-scale composite materials
and processing designs for the environmentally benign are established, and applied to innovative
industrial development.

Research subjects(1) Titanium materials with high-strength and ductility via atomic-scale microstructure optimization
by first principle calculation(2) Selective laser melted titanium alloys strengthened by solid-solution and nano-dispersoids(3) Nano-carbon materials reinforced metal matrix composites through interfacial mechanics(4) Direct bonding of plastic materials to metals by molecular structure control(5) Ni-rich TiNi shape memory alloys with nano-precipitation and expansion ability evaluation inapplication to stent devices

IPFs and IQ maps of (a) Ti–O materials with 0, 0.5, and 1.0 wt% TiO2 from side view perpendicular to build direction and (b) Ti–O
materials (0, 0.01, 0.03, and 0.5 wt% TiO2) from top view parallel to build direction. (c) Stress–strain curves from tensile tests of
SLMed Ti–O materials with different TiO2 contents. Mater. Sci. Eng. A., 795 (2020), 139983.

Major Papers
J. Umeda, T. Tanaka, T. Teramae, S. Kariya, J. Fujita, H. Nishikawa, Y. Shibutani, J. Shen and K. Kondoh,“Microstructures Analysis and Quantitative Strengthening Evaluation of Powder Metallurgy Ti-Fe Binary
Extruded Alloys with (α+β)-dual-phase”, Mater. Sci. Eng. A., 803 (2021), 140708.
K. Kondoh, M. Fukuo, S. Kariya, K. Shitara, S. Li, A. Alhazaa and J. Umeda, “Quantitative Strengthening
Evaluation of Powder Metallurgy Ti-Zr Binary Alloys with High Strength and Ductility”, J. Alloy. Compd, 852(2020), 156954.
K. Yokota, A. Bahador, K. Shitara, J. Umeda and K. Kondoh, “Mechanisms of Tensile Strengthening and Oxygen
Solid Solution in Single β-Phase Ti-35 At.%Ta+O Alloys”, Mater. Sci. Eng. A., 802 (2020), 140677.
T. Teramae, T. Tanaka, M. Fukuo, K. Shitara, J. Umeda, S. Li, A. Alhazaad and K. Kondo, “Acicular Microstructure
Formation and Strengthening Behavior of Ti-4%Fe Alloys by Zr Addition”, J. Alloy. Compd, 858 (2020), 158292.
A. Issariyapat, P. Visuttipitukul, J. Umeda and K. Kondoh, ”Refined grain formation behavior and strengthening
mechanism of α-titanium with nitrogen fabricated by selective laser melting”, Additive Manufacturing, 36(2020), 101537.
K. Kondoh, E. Ichikawa, A. Issariyapat, K. Shitara, J. Umeda, B. Chen and S. Li, “Tensile Property Enhancement
by Oxygen Solutes in Selectively Laser Melted Titanium Materials Fabricated from Pre-Mixed Pure Ti and TiO2
Powder”, Mater. Sci. Eng. A., 795 (2020), 139983.

7

Research Division of Materials Joining Assessment, Dep. of Joining Mechanics andAnalyses
Research summary
The mathematical and numerical modelling is a basis of AI (Artificial Intelligent) and one of the mostefficient approaches to look into various detail phenomena involved in joining & welding & additive
manufacturing processes. In addition, assessment to residual stress/strain and strength of various
types of joints between dissimilar materials is being studied through both the advanced measuring
technology and numerical computational approaches.

Research subjects(1) Computational modelling of nonlinear thermo-mechanical-metallurgical phenomena in multimaterials additive manufacturing, fusion welding and solid-state joining,(2) Field Measurement and FEM (M-FEM) for identification of internal residual stress and fracture
criteria of materials and various types of joints.
(3) Artificial Intelligent (AI) and digital twin for full manufacturing processes including metal forming,
joining, welding and assembling of structures.

Major Papers
Q. Wang, N. Ma, M. Takahashi, X. Luo and C. Li, “Development of a Material Model for Predicting Extreme
Deformation and Grain Refinement during Cold Spraying”, Acta Mater., 199 (2020), 326-339.
R. Geng, J. Du, Z. Wei and N. Ma, “Multiscale Modelling of Microstructure, Micro-segregation and Mechanical
Properties of Al-Cu Alloy in Wire and Arc Additive Manufacturing”, Addit. Manuf. 36 (2020), 101735.
P. Geng, G. Qin, J. Zhou, T. Li and N. Ma, “Characterization of Microstructures and Hot-Compressive Behaviorof GH4169 Superalloy by Kinetics Analysis and Simulation”, J. Mater. Process. Technol., 288 (2020), 116879.
S. Ren, Y. Ma, S. Saeki, Y. Iwamoto, C. Chen and N. Ma, “Fracture mechanism and strength evaluation of
Al5052/CFRP joint produced by coaxial one-side resistance spot welding”, Compos. Struct., 252, 11 (2020),
112766.
H. Serizawa, K. Mitsufuji and F. Miyasaka, “Development of New Particle Method Based on MPS and Its
Applicability for Friction Stir Welding of Dissimilar Joint”, Mater. Sci. Forum, 1016 (2020), 218-222.

8

Research Division of Materials Joining Assessment, Dep. of Structural Integrity
and Failure Assessments
Research summary
The welding & joining design should use the properties and qualities of materials to their best
advantage in service conditions. A need has been increased for more creative joint design andmanufacturing in the industry. This department focuses on the development of a procedure for
fitness-for-service assessment, in particular fracture assessment of metallic structures constructedby joining & welding. The methodology is founded on the local approach to fracture, which enables
the transferability analysis between the strength of fracture toughness specimen and theperformance of structural component. With this procedure, the critical allowance of flaw anddamage in service conditions is predicted. The results are published as national and international
standards or guidelines for user friendliness.

Research subjects(1) Structural integrity assessment by the Weibull stress approach(2) Development of fitness-for-service assessment procedure for welded structures in service(3) Interface strength evaluation of dissimilar joints(4) Fracture performance assessment under dynamic loading(5) Science of go/no-go of dynamic crack propagation

Dynamic analysis of stress-strain fields
in Charpy specimen of dissimilar joints

Structural integrity assessment of weld structuresby the Weibull stress criterion
Development of international fracture assessment
standard, ISO 27306, for steel structures

Major Papers
D. Lin, L. Xu, H. Jing, Y. Han, L. Zhao and F. Minami, “Effects of Annealing on the Structure and Mechanical
Properties of FeCoCrNi High-Entropy Alloy Fabricated via Selective Laser Melting”, Addit. Manuf. 3 (2020),
101058.
T. Kawabata, T. Inoue, T. Tagawa, T. Fukui, Y. Takashima, K. Shibanuma and S. Aihara, “Historical Review of
Research on Brittle Crack Propagation Arresting Technology for Large Welded Steel Structures Developed inJapan with the Application of Kca Parameters”, Mar. Struct., 71 (2020), 102737.
L. Zhao, C. Shao, Y. Takashima, F. Minami and F. Lu, “Numerical Investigation on Fracture Initiation Properties
of Interface Crack in Dissimilar Steel Welded Joints”, Chin. J. Mech. Eng., 33 (2020), 27.

9Research Division of Materials Joining Assessment, Dep. of Joining Design and
Dependability
Research summary
In evaluating the reliability of the structures, this department investigates not only theconventional optimization for the safety and the durability in constructing steel structures but also
the reliability (Dependability) including the maintenance, the repair/reinforcement and theevaluation of lifetime considering cultural science and social science. Moreover, making researcheson the procedure to safely break up the structures completing the lifetime, the circulating loop in
which the members or the units are reused is concretized.
The department purposes to establish the evaluating methods to satisfy the high accuracy andthe high quality in cutting, processing and assemblage for “products of steel structures” based on
the dependability in the circulating loop containing the maintenance, the repair/reinforcement andthe evaluation of lifetime.

Research subjects(1) Soundness diagnosis of structural members and joints(2) Development of simulation technology of mechanical behavior(3) Development of fatigue life assessment technology (crack nucleation, propagation)(4) Development of measurement technology of deformation and crack(5) Development of life extension technology for structural members and joints(6) Assessment of Weldability and Quality of New and Functionally Graded Materials

Development of life extension
technology for steel structures

Numerical simulation of mechanicalfatigue phenomena

Ultra-dynamic and cyclic loading test for large
structures
Soundness diagnosis of structure members by
ultra-dynamic structural testing system（Speed 1,200mm/sec, Load 1,200kN, Stroke
500mm）

Major Papers
R. Gadallah and S. Tsutsumi, “An Interaction Integral Retardation Model for Predicting Fatigue Life under
Multi-Step Loading”, Eng. Fract. Mech., 236 (2020), 107224 (1-19).
R. Fincato and S. Tsutsumi, “An Overstress Elasto-Viscoplasticity Model for High/low Cyclic Strain Rates
Loading Conditions: Part I - Formulation and Computational Aspects”, Int. J. Solids Struct., 207 (2020),
279-294.
R. Fincato and S. Tsutsumi, “An Overstress Elasto-Viscoplasticity Model for High/low Cyclic Strain Rates
Loading Conditions: Part II - Numerical Analyses”, Int. J. Solids Struct., 208-209 (2020), 247-261.
Y. Wang, Y. Luo and S. Tsutsumi, “Parametric Formula for Stress Concentration Factor of Fillet Weld Joints with
Spline Bead Profile”, Materials, 13, 20 (2020), 4639.
R. Gadallah, S. Tsutsumi, T. Yonezawa and H. Shimanuki, “Residual Stress Measurement at the Weld Root of
Rib-To-Deck Welded Joints in Orthotropic Steel Bridge Decks Using the Contour Method“, Eng. Struct., 219(2020), 110946.

10

Research Division of Materials Joining Assessment, Dep. of Reliability Evaluation& Simulation
Research summary
Development of innovative manufacturing technology is required to manufacture highperformance machine products and structures of the next-generation. Department of Reliability
Evaluation & Simulation conducts research and education for elucidation and control of the factors
on weldment properties by high accurate evaluation based on material science and engineering. In
order to create innovative and attractive technique of welding & Joining as a final aim, ourdepartment are working on elucidation of metallurgical phenomenon such as solidification andtransformation, and on developing the predication method for the microstructures and theproperties of weldments.

Research subjects(1) Elucidation for mechanism of microstructural evolution during solidification and solid state inweld metal of stainless steels and carbon steels(2) Investigation of controlling factor of hot cracking susceptibility and establishment of theprediction technology of the cracking during welding and additive manufacturing(3) Clarification of influential factors of corrosion resistance of stainless steel welds(4) Analysis of solidification/transformation behavior and accurate evaluation of hot cracking
susceptibility by using In-situ observation technique(5) Development of improvement technology of properties of weld metal by microstructural control

Evaluation and analysis of hot cracking susceptibility test

Control of Lathy ferrite formation in weld metal of austenitic stainless steel
High temperature in-situ observation bylaser microscope

Major Papers
K. Kadoi, S. Ueda, S. Tokita and H. Inoue, “Effect of MC Carbide Formation on Weld Solidification Cracking
Susceptibility of Austenitic Stainless Steel”, J. Alloy. Compd, 828, 5 (2020), 154423.
K. Kadoi, Y. Nakata, H. Inoue and S. Saruwatari, “Relationship between Solidification Sequence and Toughness
of Carbon Steel Weld Meta”, Mater. Charact., 165 (2020), 110402.
S. Tokita, K. Kadoi, S. Aoki and H. Inoue, “Relationship between the Microstructure and Local Corrosion
Properties of Weld Metal in Austenitic Stainless Steels”, Corrosion Sci., 175 (2020), 108867.

11

Smart Processing Research Center, Dep. of Smart Coating Processing
Research summary
This department deals with smart coating processing based on nanoparticle processing, whichleads to advanced manufacturing technology as well as safe, security, environmental and energy
issues. By making use of new properties of nanoparticles, nanoporous or multi-component films
can be created without any heat assistance. Nano and microscale design of particles will lead tohigh reliability and functional coating films with various kinds of coating processes. Smart coatingon the surface of particles will make key materials for new areas such as DDS (Drug Delivery System)
or Fuel Cells.

Research subjects(1) Development of solid-state processing in water vapor for functional fine-particle synthesis(2) Low temperature synthesis of composite oxide nanoparticles by mechanochemical method(3) Development of Li ion battery electrodes by controlling their composite structure(4) Wet processing for composite nanoparticles and their applications for fuel cells(5) Development of fuel cell electrodes for PEFC and SOFC
(6) Development of low thermal conductivity materials using composite particles(7) Development of 3D direct-assembly process of nanoparticles(8) New recycling process of composite materials by bonding and disassembling of their interface(a) Fabrication of cathode particle with gradient composition
for Li ion battery by dry processing(b) Fabrication of both cathode and anode nanostructure
for SOFC by wet processing

Major Papers
H.-Y. Chang, Y.-C. Chen, P.-Y. Hsu, W.-H. Tuan, A. Kondo, T. Kozawa and M. Naito, “Strengthening Bioceramicthrough an Approach of Powder Processing”, Adv. Powder Technol., 31, 10 (2020), 4180-4186.
D. Lee, A. Kondo, S. Lee, S. Myeong, S. Sun, I. Hwang, T. Song, M. Naito and U. Paik, “Controlled Swelling
Behavior and Stable Cycling of Silicon/Graphite Granular Composite for High Energy Density in Lithium Ion
Batteries”, J. Power Sources, 457, (2020) 228021.
T. Kozawa, T. Harata and M. Naito, “Fabrication of an LiMn 2O4@LiMnPO4 Composite Cathode for Improved
Cycling Performance at High Temperatures”, J. Asian Ceram. Soc., 8, (2020) 309-317.
T. Kozawa and K. Nishikawa, “Macroporous Mn 3O4 Microspheres as a Conversion-Type Anode Material
Morphology for Li-Ion Batteries”, J. Solid State Electrochem., 24, (2020), 1283-1290.

12

Smart Processing Research Center, Dep. of Nano/Micro Structure Control
Research summary
Additive Manufacturing (AM) was newly developed as novel process to create three dimensional(3D) structures through two dimensional (2D) layer laminations. Metal and ceramic nanoparticles
were dispersed into resin paste to use for our original process. In lithography techniques, a highpower laser beam was scanned on the spread paste for 2D layer drawing and 3D structure forming.
In deposition techniques, the paste was introduced into high temperature plasma or gas flame for
2D cladding and 3D patterning. Created electric devices, biological implants and energy modules
will contribute to sustainable development.

Research subjects(1) Stereolithographic Additive Manufacturing of Metal and Ceramic Parts Using Nanoparticles
Pastes(2) Structural Fabrication of Photonic Crystals with Diamond Structures for Terahertz Wave Control(3) Modulation of Micro Porous Structures in Biological Ceramic Implants for Artificial Metabolism(4) Manufacturing of Micro Metal Lattices for Effective Controls of Heat Flow and Stress Distributions(5) Advance Development of Thermal Nanoparticles Spraying for Additive Manufacturing Technique(6) Fine Separator Formation in Solid Oxide Fuel Cells by Using Thermal Nanoparticles Spraying(7) Fine Ceramic Coating with Thermal Conductivity and Corrosion Resistance for Heat Exchanger
Tubes(8) Layer Laminations by Fine Particles Spraying and Sintering to Create Functionally Graded
Structures

Laser Scanning Stereolithography of Additive
Manufacturing to Fabricate Bulky Metal andCeramic Components with Micro Geometric
Patterns

Thermal Spraying Using Fine Particle Pastes toLaminate Metal and Ceramic Coated Layers with
Functional Nano/Micro Structures

Major Papers
T. Shimizu and S. Kirihara, “Stereolithographic Additive Manufacturing of Silicon Carbide Components”,
J. Smart Process., 9, 4 (2020), 185-189.
T. Shimizu and S. Kirihara, “Stereolithographic Additive Manufacturing of Artificial Tree Models Using Sawdust
Woodchips Dispersed Resin Paste”, J. Smart Process., 9, 4 (2020), 190-193.
T. Ito and S. Kirihara, “Stereolithographic Additive Manufacturing of Fluid Channels Bundles with Graded
Aperture Sizes in Thermoacoustic Converters”, J. Smart Process., 9, 4 (2020), 194-198.

13

Smart Processing Research Center, Dep. of Smart Green Processing
Research summary
The aim of this division is to develop the environmentally conscious smart technology to reduce
the environmental impact in manufacturing, waste treatment and recycle processing. Especially, theresearch focuses on the following topics; substitution of materials to toxic free and eco-materials inelectronics assembly, the use of low environmental impact materials in joining process,enhancement of reliability of fine-pitch high density packaging, and design for reuse. Also lowtemperature joining, substitution of rare materials and precious metals to popular substances, anddevelopment of low energy consumption new smart joining process which can make highly reliable
joint are the targets of research in smart green processing department.

Research subjects(1) Promotion of toxic-free manufacturing of fine pitch high density packaging in electric
equipments and electronics(2) Interfacial reaction between lead-free solder and materials(3) Improvement of joint lifetime by controlling microstructures at interface(4) Nano-particle assisted smart bonding(5) High reliability of Cu filler conductive adhesive bonding(6) Low temperature joining of metallic glasses

Addition of various particles into electricalconductive adhesives to improve the performanceof electrical conductive adhesive(a) With low melting point metal(b) With nano-particles

Influence of Co addition to Sn-3.5Ag solder onintermetallic compound at solder/Cu interface

Major Papers
S. Zhou, S. He and H. Nishikawa, “Effect of Zn Addition on Interfacial Reactions and Mechanical Properties
between Eutectic Sn58Bi Solder and ENIG Substrate”, J. Nanosci. Nanotechnol., 20, 1 (2020), 106-112.
R. Gao, S. He, J. Li, Y.-A. Shen and H. Nishikawa, “Interfacial Transformation of Preoxidized Cu
Microparticles in a Formic-Acid Atmosphere for Pressureless Cu-Cu Bonding”, J. Mater. Sci. -Mater.
Electron., 31 (2020), 14635-14644.
S. He, R. Gao, Y.-A. Shen, J. Li and H. Nishikawa, “Wettability, Interfacial Reactions, and Impact Strengthof Sn-3.0Ag-0.5Cu Solder/ENIG Substrate Used for Fluxless Soldering under Formic Acid Atmosphere”,
J. Mater. Sci., 55, 7 (2020), 3107-3117.
R. Gao, Y.-A. Shen, J. Li, S. He and H. Nishikawa, “Mechanical and Microstructural Enhancements of Ag
Microparticle-Sintered Joint by Ultrasonic Vibration”, J. Mater. Sci. -Mater. Electron., 31 (2020), 2171121722.

14

Smart Processing Research Center, Dep. of Life-Innovation Materials Processing
Research summary
This department focuses on developments of new materials and their processing technologies
that contribute to the life-innovation, aiming to realize a sustainable and healthy society from theviewpoint of advanced process science. In particular, we will develop functional materials including
magnetorheological fluids that have human-friendly power transmission for next-generation
rehabilitation robots. In addition, we will explore processing methods for the life-innovationmaterials, based on nanostructural controls of various joint configurations including solid-liquidinterfaces.

Research subjects(1) Synthesis of biocompatible nano/micro particles(2) Development of rheological stimuli-responsive materials(3) Hierarchical interface controls for non-adhesive and antifouling(4) Ceramics technology for life innovation
Magnetorheological Fluid

Biocompatible Magnetite Particles

Fe3O4

Fe3O4

H=0

H>0

Fluidic

Solidified

Hierarchical Interface Control

300K

G’

G’’

(Above)Biocompatible Magnetite particles

Colloidal magnetorheological fluid for soft-robotics(Below) Hierarchical interface control on
metal surface

Major Papers
C. Sakaguchi, Y. Nara, T. Hashishin, H. Abe, M. Matsuda, S. Tsurekawa and H. Kubota, “Direct Observation of
Potential Phase at Joining Interface between p-MgO and n-MgFe2O4”, Sci. Rep., 10 (2020), 17055.
T. Naka, J. Valenta, J. Kastil, M. Misek, J. Prchal, V. Sechovsky, H. Abe, T. Nakane, M. Nakayama and T. Uchikoshi,"Chemical and Physical Pressure Effects in the A-site Spinel Antiferromagnetes CoM2O4(M=Al, Co, Rh)”, Mater.
Res. Express, 7 (2020), 056105(13pages).

15

Hitachi Zosen Advanced Welding Technology Joint Research Chairs
Research summary
This research chair has been developing welding technology to realize international competitive
manufacturing for wide range of thick-plate structures by fusing advanced technologies owned by
JWRI and Hitachi Zosen Corporation. It aims to realize smart manufacturing factory.
The high power laser technology for thick plate welding developed in this chair has reached apractical level at the factory. Now, we are developing the foundation of the digital welding
technology required at next generation like process simulation technology and waveform
controlled the high heat input digital submerged arc welding technology.
Furthermore, as a new development of laser welding technology, we will promote thedevelopment of three dimensional overlay welding technology that realizes high wear resistanceby utilizing blue laser etc.

Research subjects(1) Development of Laser Welding Technology for Thick Plate(2) Development of High Efficiency SAW Technology(3) Development of Overlay Welding Technology using Additive Manufacturing(4) Smart Welding & Manufacturing System

Laser Multi-layer Welding Technology for Thick
Plate(a) Schematic diagram of welding process(b) Schematic diagram of gap sensing system(c) Groove shape and cross section of weld

Overlay Welding Technology using Additive Manufacturing

Welding direction

Hole

CavitySolidified flux

Flux
Welding wire

Solidified slag

Molten slag flow

Molten flux
DropletPore

Weld metal
Weld pool flow

Arc
Base metal

SAW Phenomena

Major Papers
Y. Abe, T. Fujimoto, M. Nakatani, M. Shigeta and M. Tanaka, “Development of a Welding Condition
Optimization Program for Narrow Gap SAW”, Q. J. Jpn. Weld. Soc., 38, 2 (2020), 98s-102s.
U. K. Mohanty, Y. Abe, T. Fujimoto, M. Nakatani, A. Kitagawa, M. Tanaka, T. Suga and A. Sharma, " Performance
Evaluation of Alternating Current Square Waveform Submerged Arc Welding as a Candidate for Fabrication ofThick Welds in 2.25Cr-1Mo Heat-Resistant Steel”, J. Press. Vessel Technol. -Trans. ASME, 142 (2020), 041506(11 pages).

16

Osaka Fuji "Advanced Functional Processing" Joint Research Chairs
Research summary
This research chair aims to develop advanced functional processing technics by combining laser
processing technology and materials knowledge in JWRI and advanced functional manufacturing
technologies of Osaka Fuji Corporation.
The main purpose is to develop the surface functioning of various materials by laser cladding
method, low weldability materials. Finally, these fruits are applied to the next generation of
manufacturing technology for various industrial fields.

Research subjects(1) Development of highly functional surface by laser cladding(2) Development of functional surfaces of small or thin parts(3) Development of hybrid technology of laser and conventional surfacing technologies(4) Fundamental research of laser additive manufacturing technology

Dynamic observation of molten pool behavior for analysis ofblow halls formation using high-speed camera

Example of laser cladding on edge of screw

Experimental apparatus for laser cladding

Wide, flat cladding layer which was provided by beam control

Major Papers
K. Ono, Y. Sato, R. Higashino, Y. Funada, N. Abe and M. Tsukamoto, “Pure Copper Rod Formation by Multibeam
Laser Metal Deposition Method with Blue Diode Lasers”, J. Laser Appl., 33, 1 (2020), 012013.
K. Ishida, S. Tashiro, M. Mizutani and M. Tanaka, “Effect of Focal Position on Laser-MAG Arc Hybrid Weld Beadof Thick High-Strength Steel Plate”, Q. J. Jpn. Weld. Soc., 38 (2020), 131s-134s.
K. Ishida, S. Tashiro, M. Mizutani and M. Tanaka, “Study on the Weld Bead Formation on Square-Groove Butt
Joint Using Plasma-MIG Hybrid Welding Process”, Q. J. Jpn. Weld. Soc., 38 (2020), 135s-138s.
T. Hara, Y. Sato, R. Higashino, Y. Funada, T. Ohkubo, K. Morimoto, N. Abe and M. Tsukamoto, “Pure Copper
Layer Formation on Pure Copper Substrate Using Multi-Beam Laser Cladding System with Blue Diode Lasers”,
Appl. Phys. A, 26 (2020) 418.

17

Development Base on Development of Interdisciplinary and International
Researchers for Creation of Life Innovation Materials
Research summary
The Project, Development Base on Creation of Life Innovation Materials for Interdisciplinary andInternational Researcher Development, has started from 2016 as inter-university cooperative
research project (Joining and Welding Research Institute, Osaka Univ., Institute for Materials
Research, Tohoku Univ., Laboratory for Materials and Structures, Tokyo Institute of Tech., Institute ofMaterials and Systems for Sustainability, Nagoya Univ., Institute of Biomaterials and Bioengineering,Tokyo Medical and Dental Univ., Research Organization for Nano & Life Innovation, Waseda Univ.)
This development base promotes the joint research for development of life innovation materials forapplications in the environment and medical fields through the inter-university cooperative
researches by the 6 research institutes at 6 universities.

Research subjects(1) Environmental and sustainable materials(2) Biomedical and healthcare materials(3) Base materials and technology

6 universities cooperative research project(1) Joining and Welding Research Institute, Osaka Univ.
(2) Institute for Materials Research, Tohoku Univ.
(3) Laboratory for Materials and Structures, Tokyo Institute of Tech.
(4) Institute of Materials and Systems for Sustainability, Nagoya Univ.
(5) Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental Univ.
(6) Research Organization for Nano & Life Innovation, Waseda Univ.

Research topics(1) Synthesis and integration of tailor-made ceria
nanocubes towards environmental applications(2) Synthesis and coating of tailor-made titania
nanosheets towards bio-medical applications

Cooperation system of the six research institutes at six universities

Major Papers

K. Hayashi, K. Nozaki, Z. Tan, K. Fujita, R. Nemoto, K. Yamashita, H. Miura, K. Itaka, and S. Ohara, “Enhanced
Antibacterial Property of Facet-Engineered TiO2 Nanosheet in Presence and Absence of Ultraviolet Irradiation”,
Materials, 13, 1 (2020), 78-1-13.
S. Ohara, T. Naka, K. Sunakawa, S. Kubuki, M. Senna and T. Hashishin, “Emergence of Ferromagnetism Due toCharge Transfer in Compressed Ilmenite Powder Using Super-High-Energy Ball Milling”, Sci. Rep., 10 (2020),
5293-1-7.
Z. Dai, J. Cao, Z. Guo, K. Zheng, X.-Z. Song, W. Wen, X. Xu, X. Qi, S. Ohara and Z. Tan, “Soft X-ray-Enhanced
Reactive Oxygen Species Generation in Mesoporous Titanium Peroxide and the Application in Tumor
Synergistic Therapy”, ACS Appl. Bio Mater., 3, 11 (2020), 7408-7417.

18

Center to Create Research and Educational Hubs for Innovative Manufacturing in
Asia
Summary
From FY 2013-FY 2018, the project called “Center for the Project to Create Research and
Educational Hubs for Innovative Manufacturing in Asia” were implemented to establish new joining
and welding technologies, to create research networks, and to cultivate global leaders in the region.
Since FY 2018 namely the second phase, based on the research network established throughformer activities, the project has been continued to strengthen and obtain higher international
competency both in institution wide and in university wide through high quality international
collaborative research achieved by having organic cooperation with ASEAN Campus Programme
and with Global Knowledge Partners promoted by Osaka University.
As in detail, two pillars are set as follows: 1) Strengthen International Collaborative Research:
Increase number of co-authored papers by implementing international collaborative research withoverseas universities, establish international joint laboratory, 2) Conduct practical Global Leader
Training: Implement Inbound & Outboud Coupling Internship (CIS) takes place both overseas anddomestic which is composed of students from different majors and different cultures.
From FY 2020, the CIS starts to award 2 credits for participants. Due to the COVID-19 situation, allactivities for the CIS in FY 2020 had been implemented by online which created a new type ofinteraction and learnings.

Activities(1) Strengthen International Collaborative Research: Increase number of co-authored papers byimplementing international collaborative research, establish international joint laboratory(2) Conduct practical Global Leader Training: Implement Inbound & Outboud Coupling Internship(CIS) both overseas and domestic which is composed of students from different majors anddifferent cultures.
Table.1 Some major international joint research topics in FY 2020 (Excerpt)
Partner

Research Topics

University of Technology Malaysia,
Kocaeli University, Turkey
University of Technology Malaysia,
Kocaeli University, Turkey

Microstructure control of high oxygen concentration dual phase Ti alloys via hot
extrusion
Strengthening and high-temperature behavior of Ti using ubiquitous elements(Ti–Fe–O–Cu–Si)
Measurement of local material properties and failure analysis of resistance spot weldsof advanced high-strength steel sheets
Microstructure and strength assessment of friction self-piercing rivetedaluminum alloy AA7075-T6 joints

Xi’an Shiyou University, China
Shanghai Jiao Tong University,
China

Table.2 Some major papers issued in FY 2020 (Excerpt)
1
2
3
4
5

PapersA. Bahador, J. Umeda, R. Yamanoglu, H. Ghandvar, A. Issariyapat, T.A. Abu Bakar, K. Kondoh, Deformation mechanismand enhanced properties of Cu–TiB2 composites evaluated by the in-situ tensile test and microstructure characterization,
Alloys and Compounds, vol. 847, (2020)
A. Bahador, J. Umeda, R. Yamanoglu, T.A. Abu Bakar, K. Kondoh, Strengthening evaluation and high-temperature
behavior of Ti–Fe–O–Cu–Si alloy, Materials Science and Engineering A, vol. 800, pp. 140324 (2021).
Yunwu Ma, He Shan, Sizhe Niu, Yongbing Li, Zhongqin Lin, and Ninshu Ma, A Comparative Study of Friction Self-Piercing
Riveting and Self-Piercing Riveting of Aluminum Alloy AA5182-O, Engineering, (2020)
Yunwu Ma, Sizhe Niu, He Shan, Yongbing Li, and Ninshu Ma, Impact of Stack Orientation on Self-Piercing Riveted andFriction Self-Piercing Riveted Aluminum Alloy and Magnesium Alloy Joints, Automotive Innovation, (2020)
M. Katsumata,C Hashimoto, A Comparative Study on the Recognition of Humanities and Engineering Students Througha Practical Internship (From Coupling Internship at Osaka University), Journal of Global Competency Education, vol.7
No.2, pp.14-21, (2020)

Table. 3 List of Online Coupling Internship in FY 2020
Partner Country

Thailand
Vietnam
MyanmarIndonesia

Host Company

OTC Daihen
IHI Infrastructure Asia
J&M Steel Solutions
Cilegon Fabricators

Partner University

Kasetsart University
Hanoi Univ. of Science and Technology
Yangon Technological. University
Indonesia University

19

R&D Project for Environmental Resources and ECO Joining
Research summary
We study concerning the environmental resources/energy system and ECO-joining in this project.
Efficient repair technology for aging concrete structures is an important topic not only in terms of
economy but also in terms of environmental impact. Joint-defect detection is necessary to repair
and restore the concrete infra-structures. We investigated an inspection technique using a laser
Doppler vibrometer and AI (artificial intelligence) deep learning for the purpose of developing amethod to detect concrete defects with high accuracy regardless of inspectors' skills. Also, an
environment harmony energy device, for example, Mg-air battery is being developed to prepare
lighting for blackouts due to natural disasters of earthquakes and typhoons. It is, also, very
important to improve energy efficiency and to save resources by establishing bonding technologies
adequate for manufacturing ecological products without toxic substances. Micro-joining processes
for advanced electronic assembly such as wire and ribbon bonding have been studied.
Establishment of the way to sustainable human society overcoming global environmental problems
is the final purpose of the R&D project.

Research subjects

Amplitude (arb. unit)
Amplitude (arb. unit)

Velocity (m/s)

Velocity (m/s)(1) Cathode materials design of Mg-air battery(2) Improvement of structures of Mg-air battery for establishing the long lift and high power(3) Development of Mg-air battery for charging smartphones(4) Solid state micro joining (ultrasonic joining) for power electronic packaging(4) Interfacial nanostructures between wide-gap semiconductors and their electrodes.
(5) Study of joint-defect detection of infra-structures, using the laser Doppler technique and Al deeplearning system(6) Study of separation and collection of toxic substances(7) Study of sustainable system for cleating environmental resources.

Architecture of the convolutional neural network. Fouriertransformed spectra of a laser Doppler vibrometer signal weredimensionally reduced to 72 parameters by pre-processing
with a melt filter bank. The parameters were then transformed
into 64 x 10 parameters using two layers of one-dimensional
convolutional networks and connected into a dense layer. The
neural network architecture was able to distinguish between
defective and intact parts with over 90% accuracy.

(Left) Temporal waveform of a laser Doppler vibrometer signalof a concrete pillar of a defective (upper) and an intact part(bottom). (Right) Fourier transformed spectra. Characteristic
peak frequencies were different between the defective and theintact part.

Major Papers
M. Muramatsu, S. Uchida and Y. Takahashi, “Noncontact Detection of Concrete Flaws by Neural Network
Classification of Laser Doppler Vibrometer Signals”, Eng. Res. Express, 2 (2020), 025017.
Y. Takahashi, M. Tsutaoka and M. Maeda, “Effect of SiC Crystal Orientation on Ti3SiC2 Formation between SiC
and Al/Ti Bi-Layered Film”, Ceram. Int. (2020), in Press.

20

CONTRIBUTIONS TO OTHER ORGANIZATIONS(January 2020 ~ December 2020)[Physics, Processes, Instruments & Measurements]

R. UENO, H. KOMEN, M. SHIGETA and M. TANAKA
Numerical Simulation of Droplet Transfer with TiO2
Flux Column During Flux Cored Arc Welding by 3D
Smoothed Particle Hydrodynamics Method
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 84s-88s.

H. KOMEN, M. TANAKA and H. TERASAKI
Three-Dimensional Simulation of Gas Metal Arc
Welding Process Using Particle-Grid Hybrid Method
Q. J. Jpn. Weld. Soc., 38 (2020), 25s-29s.

K. TANAKA, M. SHIGETA, M. TANAKA and A. B. MURPHY
Investigation of Transient Metal Vapour Transport
Processes in Helium Arc Welding by Imaging
Spectroscopy
J. Phys. D-Appl. Phys., 53, 42 (2020), 425202(8 pages).

M. TANAKA, T. METHONG, H. KOMEN, M. SHIGETA,
T. KATAOKA, M. MATSUSHITA and S. KOZUKI
Effect of Shielding Gas Composition on Gas Metal
Arc Welding Phenomena Using Rare Earth Metal
Added Wire
Quarterly J. Japan Welding Soc., 38, 4 (2020),
438-447.

S. MAENAKA, S. TASHIRO, A. B. MURPHY, K. FUJITA and
M. TANAKA
Influence of Electrode Energy Balance on Gas
Convective Pattern of a High-Pressure Xenon Short
Arc Lamp
Plasma Chem. Plasma Process., 40 (2020), 819-837.

J. XIANG, H. PARK, K. TANAKA, M. SHIGETA, M. TANAKA andA. B. MURPHY
Numerical Study of the Effects and Transport
Mechanisms of Iron Vapour in Tungsten Inert-Gas
Welding in Argon
J. Phys. D-Appl. Phys., 53, 4 (2020), 44004(14 pages).

F. JIANG, C. LI, B. XU, S. TASHIRO, M. TANAKA and S. CHEN
Study on the Decoupled Transfer of Heat and Massin Wire Variable Polarity Plasma Arc Welding
Materials, 13 (2020), 1073(16pp).

M. SHIGETA
Models and Numerical Methods of Multi-Physics in
Nanoparticle Mass-Production by Thermal Plasma
Flows
Prod. Eng., 72, 1 (2020), 87-90 (in Japanese).

S. B. MAMAT, S. TASHIRO, M. N. MASRI, S. M. HONG,
H.-S. BANG and M. TANAKA
Application of Pulse Plasma MIG Welding Process to
Al/steel Dissimilar Joining
Weld. World, 64 (2020), 857-871.

M. SHIGETA
Simulating Turbulent Thermal Plasma Flows for
Nanopowder Fabrication
Plasma Chem. Plasma Process., 40 (2020), 775-794.

S. TASHIRO, N. MUKAI, Y. INOUE, A. B. MURPHY, T. SUGA and
M. TANAKA
Numerical Simulation of the Behavior of Hydrogen
Source in a Novel Welding Process to Reduce
Diffusible Hydrogen
Materials, 13 (2020), 1619(18pp).

J. XIANG, F. CHEN, H. PARK, K. TANAKA, M. SHIGETA,
M. TANAKA and A. B. MURPHY
Numerical Study of the Metal Vapour Transport inTungsten Inert-Gas Welding in Argon for StainlessSteelAppl. Math. Model., 79 (2020), 713-728.

S. MAENAKA, S. TASHIRO, A. B. MURPHY, K. FUJITA and
M. TANAKA
Numerical Prediction of Influence of Gas Species on
Gas Convective Pattern of Short Arc Lamp
Q. J. Jpn. Weld. Soc., 38 (2020), 30-34.

K. TANAKA, M. SHIGETA, M. TANAKA and A. B. MURPHY
Imaging Spectroscopy for Transient Transport ofChromium Vapor During Helium TIG Welding
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 21s-24s.

21

A. V. NGUYEN, S. TASHIRO, M. H. NGO, A. H. LE,
H. V. BUI and M. TANAKA
Influence of Shielding Gas Composition on Molten
Metal Flow Behavior during Plasma Keyhole Arc
Welding Process
J. Manufacturing Processes, 53 (2020), 431-437.

K. ISHIDA, S. TASHIRO, M. MIZUTANI and M. TANAKA
Effect of Focal Position on Laser-MAG Arc Hybrid
Weld Bead of Thick High-Strength Steel Plate
Q. J. Jpn. Weld. Soc., 38 (2020), 131s-134s.
N. MUKAI, S. TASHIRO, A. B. MURPHY, Y. INOUE, T. SUGA and
M. TANAKA
Study of Shieldability of the Low Hydrogen Welding
Process by Numerical Simulation
J. Smart Process., 9, 4 (2020), 199-207(in Japanese).

A. AOKI, S. TASHIRO, H. KUROKAWA and M. TANAKA
Influence of Welding Materials of Duplex Current
Feeding MIG Welding
Q. J. Jpn. Weld. Soc., 38 (2020), 16s-20s.
S. TASHIRO, A. AOKI, H. KUROKAWA and M. TANAKA
Numerical Prediction of Feasibility to Lower Droplet
Temperature in Duplex Current Feeding MIG
Welding Process
Q. J. Jpn. Weld. Soc., 38 (2020), 44s-48s.

D. WU, S. TASHIRO, Z. WU, K. NOMURA, X. HUA and
M. TANAKA
Interactive Phenomena in Hybrid KPAW-GMAW
Weld. J., 99 (2020), 146-s-155-s.
A. N. VAN, A. MURATA, S. TASHIRO, M. N. HUU and
M. TANAKA
Research and Development of a Novel Welding
Technology for Joining Ultra-thin Sheet Applying in
Metal Forming Fields
IIW Annual Assembly, 2020 (USB), (2020), Doc.
XII-2348-19.

S. TASHIRO, S. ITODA, T. MORICHI, A. B. MURPHY and
M. TANAKA
Numerical Simulation of Magnetic Blowout Processof Air Arc Plasma in Electrical Contacts
Q. J. Jpn. Weld. Soc., 38 (2020), 74s-78s.
S. MAENAKA, S. TASHIRO, A. B. MURPHY, K. FUJITA and
M. TANAKA
Investigation of the Influence of Buoyancy on Gas
Convection of a Horizontal Xenon Short Arc Lamp
through 3D Numerical Simulation
J. Phys. D-Appl. Phys., 53 (2020), 85205(17pp).

L. XIAO, D. FAN, J. K. HUANG, S. TASHIRO and M. TANAKA
3D Numerical Study on High-Current GMAW Metal
Transfer Behavior with an External Alternating Axial
Magnetic Field
IIW Annual Assembly, 2020 (USB), (2020), Doc.
212-1666-20.

A. AOKI, S. TASHIRO, H. KUROKAWA and M. TANAKA
Application of Duplex Current Feeding Metal Inert
Gas Welding to Overlay Welding Using Nickel BasedAlloy Welding
J. Smart Process., 9, 3 (2020), 140-147(in Japanese).

S. M. HONG, S. TASHIRO, H-S. BANG and M. TANAKA
Numerical Analysis on Thermal Characteristics of
Direct Current Pulsed Gas Metal Arc Welded Jointsof AA5052 Aluminum Alloy to DP590 High Strength
Steel
Q. J. Jpn. Weld. Soc., 38 (2020), 93s-97s.

S. MAENAKA, S. TASHIRO, A. B. MURPHY, K. FUJITA and
M. TANAKA
Influence of Thermodynamic and Transport
Properties of Gas on Heat Load to Bulb of Xenon
Short Arc Lamp
J. Smart Process., 9, 3 (2020), 148-155(in Japanese).

D. WU, S. TASHIRO, X. HUA and M. TANAKA
Numerical Study of Keyhole Behaviors and Thermal
Fluid Flow in High Current Plasma Arc Welding
Q. J. Jpn. Weld. Soc., 38 (2020), 40s-43s.
S. MAMAT, A. A. M. AFANDI, M. B. A. BAKAR, M. N. MASRI,
M. MOHAMED, M. K. A. A. RAZAB, T. YUJI, S. TASHIRO and
M. TANAKA
Effect of Plasma Flow in Plasma MIG Welding
Process to the Microstructure Refinement at Heat
Affected Zone of As-Welded Carbon SteelMater. Sci. Forum, 1010 (2020), 15-20.

K. ISHIDA, S. TASHIRO, M. MIZUTANI and M. TANAKA
Effect of Focal Position on Laser-MAG Arc Hybrid
Weld Bead of Thick High-Strength Steel Plate
Q. J. Jpn. Weld. Soc., 38 (2020), 131s-134s.

22

A. V. NGUYEN, S. TASHIRO, M. H. NGO, H. V. BUI and
M. TANAKA
Effect of the Eddies Formed inside a Weld Pool on
Welding Defects during Plasma Keyhole Arc
Welding
J. Manufacturing Processes, 59 (2020), 649-657.

S. HE, R. GAO, Y.-A. SHEN, J. LI and H. NISHIKAWA
Wettability, Interfacial Reactions, and Impact
Strength of Sn-3.0Ag-0.5Cu Solder/ENIG Substrate
Used for Fluxless Soldering under Formic Acid
Atmosphere
J. Mater. Sci., 55, 7 (2020), 3107-3117.

D. WU, S. TASHIRO, X. HUA and M. TANAKA
Coupled Mechanisms of the Keyhole, Energy
Transfer and Compositional Change Associated with
the Variable Polarity Plasma Arc Process
J. Phys. D-Appl. Phys., 54 (2020), 115204.

S. KOGA, H. NISHIKAWA, M. SAITO and J. MIZUNO
Fabrication of Nanoporous Cu Sheet and Application
to Bonding for High-Temperature Applications
J. Electronic Mater., 49, 3 (2020), 2151-2158.
D. L. HAN, Y.-A. SHEN, S. JIN and H. NISHIKAWA
Microstructure and Mechanical Properties of the
In-48Sn-xAg Low-Temperature Alloy
J. Mater. Sci., 55 (2020), 10824-10832.

L. XIAO, D. FAN, J. HUANG, S. TASHIRO and M. TANAKA
3D Numerical Study of External Axial Magnetic
Field-Controlled
High-Current
GMAW
Metal
Transfer Behavior
Materials, 13 (2020), 5792(16pp).

C.-H. TSAI, W.-C. HUANG, C. R. KAO, L. CHEW, W. SCHMITT
and H. NISHIKAWA
Sintered Micro-Silver Paste Doped with Indium for
Die Attachment Applications of Power Ics
Proc. 2020 IEEE 70th Electronic Components andTechnology Conf. (ECTC), (2020), 1430-1435.

T. KAWASAKI, K. NISHIDA, G. UCHIDA, F. MITSUGI,
K. TAKENAKA, K. KOGA, Y. SETSUHARA and M. SHIRATANI
Effects of Surrounding Gas on Plasma-Induced
Downward Liquid Flow
Jpn. J. Appl. Phys., 59 (2020), SHHF02/1-SHHF02/6.

R. GAO, S. HE, J. LI, Y.-A. SHEN and H. NISHIKAWA
Interfacial Transformation of Preoxidized Cu
Microparticles in a Formic-Acid Atmosphere for
Pressureless Cu-Cu Bonding
J. Mater. Sci. -Mater. Electron., 31 (2020),
14635-14644.

G. UCHIDA, J. IKEDA, K. TAKENAKA and Y. SETSUHARA
Visualization Study on Interaction Between
Nonequilibrium Atmospheric Pressure He Plasma Jet
and Liquid Solution
J. Smart Process., 9, 3 (2020), 90-96 (in Japanese).
K. TAKENAKA and Y. SETSUHARA
Formation of Functional Oxide Thin Films Using
Plasma-Assisted Reactive Process
J. Japan Welding Soc., 89, 7 (2020), 472-475(in Japanese).

M. SAITO, H. KUWAE, J. MIZUNO, W. NORIMATSU,
M. KUSUNOKI and H. NISHIKAWA
Metal Deposition Using Solutions on High-Density
and Well-Aligned CNTs
Proc.
8th
Electronics
System-Integration
Technology Conf., (2020), 43-47.

S. ZHOU, S. HE and H. NISHIKAWA
Effect of Zn Addition on Interfacial Reactions andMechanical Properties between Eutectic Sn58Bi
Solder and ENIG Substrate
J. Nanosci. Nanotechnol., 20, 1 (2020), 106-112.

H. NISHIKAWA and S. YAMANO
Effect of High-temperature Storage at 300 ℃ on
Sintered Layer Using Micro-sized Ag Particles forHigh-temperature Packaging Technology
Proc.
8th
Electronics
System-Integration
Technology Conf., (2020), 126-129.

S. HE, R. GAO, J. LI, Y.-A. SHEN and H. NISHIKAWA
In-situ Observation of Fluxless Soldering of
Sn-3.0Ag-0.5Cu/Cu under a Formic Acid Atmosphere
Mater. Chem. Phys., 239 (2020), 122309.

H. HE, X. CHEN, Z. KHAN, L. SYDANHEIMO, L. UKKONEN,
J. LI, H. NISHIKAWA and J. VIRKKI
Textile-based Passive Sensor for Air Humidity
Proc.
8th
Electronics
System-Integration
Technology Conf., (2020), 7-9.

23

Z. YANG, H. HOSOKAWA, T. SADAKANE, M. KURODA, D. INOUE,
H. NISHIKAWA and M. IKE
Isolation and Characterization of FacultativeAnaerobic Antimonate-Reducing Bacteria
Microorganisms, 8, 9 (2020), 1435.

K. ONO, M. TSUKAMOTO, Y. SATO, R. HIGASHINO, T. HARA,
Y. FUNADA and N. ABE
Forming of Pure Copper Rod by LMD Method withBlue Diode Lasers
Proc. SPIE 11271, Laser 3D Manufacturing VII,
1127117, (2020).

O. MOKHTARI and H. NISHIKAWA
Effect of Surface Potential Distribution on Corrosion
Behavior of Cu/Al Interface in Cu Wire Bonding
Applications
Microelectronics Reliability, 113 (2020), 113942.

K. MORIMOTO, M. TSUKAMOTO, Y. SATO, S. MASUNO,
S. KATO, K. AZUMI, Y. HAYASHI and N. ABE
Bead-on-plate Welding of Pure Copper Sheet with
200 W High Intensity Blue Diode Laser
Proc. SPIE 11273, High-Power Laser Materials
Processing: Applications, Diagnostics, andSystems IX, 112730E, (2020).

R. GAO, Y.-A. SHEN, J. LI, S. HE and H. NISHIKAWA
Mechanical and Microstructural Enhancements of Ag
Microparticle-Sintered Joint by Ultrasonic Vibration
J. Mater. Sci. -Mater. Electron., 31 (2020),
21711-21722.

N. KODAMA, T. TAKAHASHI, T. INOUE, M. KUDO and
M. TSUKAMOTO
Morphological Characteristics of Nanoholes Inducedby Single-Shot Femtosecond Laser Ablation of
Borates and Aluminate Silicates
J. Laser Appl., 32 (2020), 12015-12015-14.

H. NISHIKAWA
Sintered Joint Using Micro-Sized Ag Particles forHigh-Temeprature Application
J. Smart Process., 9, 6 (2020), 259-263 (in Japanese).

A. CHAMANFARA, M.-H. HUANG, T. PASANG, M. TSUKAMOTO
and W. Z. MISIOLEKMicrostructure and Mechanical Properties of Laser
Welded Ti-10V-2Fe-3Al (Ti1023) Titanium Alloy
J. Mater. Res. Technol-JMRT, 9, 4 (2020),
7721-7731.

H. NISHIKAWA
Thermal Design and Packaging Technology for WBG
Power Semiconductors (Book)
Published by CMC Publishing Co., Ltd., (2020) (inJapanese).
M. TSUKAMOTO
Development of High-brightness Blue Diode Laser
J. Japan Welding Soc., 89, 1 (2020), 21-26 (inJapanese).

M. KATTO, A. YAKOTANI, M. KAKU, T. OHKUBO and
M. TSUKAMOTO
Phase Transition of Si Surface Induced by
Femto-Second Laser Irradiation
Reports on The 546th Topical Meeting of The
Laser Society of Japan -Photonics Workshop in
Kyushu-, (2020) (in Japanese).

K. KODA and M. TSUKAMOTO
OxygenConcentration
DependenceofMicrostructure Formed on Ni by Backward Pulsed
Laser Deposition
Appl. Phys. A, 126, 114 (2020).

R. HIGASHINO, Y. SATO, S. MASUNO, T. SHOBU, Y. FUNADA,
N. ABE and M. TSUKAMOTO
Development of Blue Diode Laser for Additive
Manufacturing
Proc. SPIE 11271, Laser 3D Manufacturing VII,
1127114, (2020).

M. TSUKAMOTO
Developments of High Power Blue Diode Laser
Systems for Laser Metal Deposition and Welding ofPure Copper Materials
Proc. SPIE 11262, High-Power Diode Laser
Technology XVIII, 112620M, (2020).

S. SRISAWADI, D. TANPRAYOON, Y. SATO, M. TSUKAMOTO
and T. SUGA
Fabrication of 316L Stainless Steel with TiN Addition
by Vacuum Laser Powder Bed Fusion
Opt. Laser Technol., 126 (2020).

24

K. TOJO, M. SUWA, N. WAKABAYASHI, S. UNO, T. HIROKI,
K. TOKUDA, S. MASUNO, E. HORI, R. HIGASHINO, Y. SATO and
M. TSUKAMOTO
High-Power Blue Direct Diode Laser for Advanced
Processing
J. Smart Process., 9, 2 (2020), 41-44 (in Japanese).

H. H. ZARGARI, K. ITO, Y. MIKAMI and A. SHARMA
A Unique CEL Numerical Method on Material Flow ina Molten Pool of Workpiece Vibration Assisted
Welding
Quarterly J. Japan Welding Soc., 38, 2 (2020),
54s-58s.

D. TANPRAYOONA, S. SRISAWADI, Y. SATO, M. TSUKAMOTO
and T. SUGA
Microstructure and Hardness Response of Novel
316L Stainless Steel Composite with TiN Addition
Fabricated by SLM
Opt. Laser Technol., 129 (2020), 106238.

T. ZHAO, Y. SATO, H. KOKAWA and K. ITO
Predicting Tensile Properties of Friction-Stir-Welded
6063 Aluminum with Experimentally Measured
Welding Heat Input
Acta Metall. Sin., 33, 9 (2020), 1235-1242.
H. H. ZARGARI, K. ITO, M. KUMAR and A. SHARMA
Visualizing
theVibration
EffectontheTandem-Pulsed Gas Metal Arc Welding in the
Presence of Surface Tension Active Elements
Int. J. Heat Mass Transf., 161 (2020), 120310.

T. HARA, Y. SATO, R. HIGASHINO, Y. FUNADA, T. OHKUBO,
K. MORIMOTO, N. ABE and M. TSUKAMOTO
Pure Copper Layer Formation on Pure Copper
Substrate Using Multi-Beam Laser Cladding Systemwith Blue Diode Lasers
Appl. Phys. A, 26, 418 (2020).

K. SHITARA, A. KUWABARA, K. HIBINO, K. FUJII, M. YASHIMA,
J. R.HESTER, M. UMEDA, N. NUNOTANI and N. IMANAKA
Ionic Conduction Mechanism in Ca-doped
Lanthanum Oxychloride
Dalton Trans., (2020).

Y. SATO, S. SRISAWADI, D. TANPRAYOON, T. SUGA, T. OHKUBO
and M. TSUKAMOTO
Spatter Behavior for 316L Stainless Steel Fabricatedby Selective Laser Melting in a Vacuum
Opt. Lasers Eng., 134 (2020), 106209.

H. SERIZAWA, K. MITSUFUJI and F. MIYASAKA
Development of New Particle Method Based on MPS
and Its Applicability for Friction Stir Welding of
Dissimilar Joint
Mater. Sci. Forum, 1016 (2020), 218-222.

Y. SATO, S. FUJIO and M. TSUKAMOTO
Development of Hybrid Laser Welding System withBlue Diode Laser and Single Mode Fiber Laser
Proc. ICALEO2020, (2020), paper# MACRO302.
E. HORI, Y. SATO, T. SHIBATA, K. TOJO and M. TSUKAMOTO
Development of SLM Process Using 200 W Blue
Diode Laser for Pure Copper Additive Manufacturingof High Density Structure
J. Laser Appl., 33, 1 (2020), 12008-012008-5.

Y. KOUSAKA, T. NOMURA and M. NAITO
The Possibility of the Aerosol Infection of Corona
Disease COVID-19 : Analysis from the Viewpoint ofParticle Technology
J. Soc. Powder Technol. Jpn., 57 (2020), 526-529(in Japanese).

K. ONO, Y. SATO, R. HIGASHINO, Y. FUNADA, N. ABE and
M. TSUKAMOTO
Pure Copper Rod Formation by Multibeam Laser
Metal Deposition Method with Blue Diode Lasers
J. Laser Appl., 33, 1 (2020), 12013-012013-5.

T. KOZAWA, T. HARATA and M. NAITO
Fabrication of an LiMn2O4@LiMnPO4 Composite
Cathode for Improved Cycling Performance at High
Temperatures
J. Asian. Ceramic. Soc., 8 (2020), 309-317.

Y. MIZUGUCHI, Y. SATO, N. YOSHIDA and M. TSUKAMOTO
Effect of Input Energy on Hardness and Surface
Quality in Ti64 by Sputter-Less Selective Laser
Melting with Modulated Pulse
J. Laser Appl., 33 (2020), 012031.

T. KOZAWA and K. NISHIKAWA
Macroporous Mn3O4 Microspheres as a ConversionType Anode Material Morphology for Li-ion
Batteries
J. Solid State Electrochem., 24 (2020), 1283-1290.

25

D. LEE, A. KONDO, S. LEE, S. MYEONG, S. SUN, I. HWANG,
T. SONG, M. NAITO and U. PAIK
Controlled Swelling Behavior and Stable Cycling ofSilicon/graphite Granular Composite for HighEnergy Density in Lithium Ion Batteries
J. Power Sources, 457 (2020), 228021.

U. K. MOHANTY, Y. ABE, T. FUJIMOTO, M. NAKATANI,
A. KITAGAWA, M. TANAKA, T. SUGA and A. SHARMA
Performance Evaluation of Alternating Current
Square Waveform Submerged Arc Welding as a
Candidate for Fabrication of Thick Welds in
2.25Cr-1Mo Heat-Resistant SteelJ. Press. Vessel Technol. -Trans. ASME, 142 (2020),
041506 (11 pages).

A. KONDO, S. ISHIHARA, K. KUSHIMOTO, T. KOZAWA, J. KANO
and M. NAITIO
Relationship between Grinding Results in a Planetary
Ball Mill with Liquid Media and the Distribution ofBall Impact Energy Calculated by DEM Simulation
J. Soc. Powder Technol. Jpn., 57 (2020), 176-183(in Japanese).

Y. ABE, T. FUJIMOTO, M. NAKATANI, M. SHIGETA and
M. TANAKA
Development of a Welding Condition Optimization
Program for Narrow Gap SAW
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 98s-102s.

H.-Y. CHANG, Y.-C. CHEN, P.-Y. HSU, W.-H. TUAN,
A. KONDO, T. KOZAWA and M. NAITO
Strengthening Bioceramic through an Approach of
Powder Processing
Adv. Powder Technol., 31, 10 (2020), 4180-4186.

M. MURAMATSU, S. UCHIDA and Y. TAKAHASHI
Noncontact Detection of Concrete Flaws by Neural
Network Classification of Laser Doppler Vibrometer
SignalsEng. Res. Express, 2 (2020), 025017.

T. TANAKA, E. FUJISAWA, A. YOSHIHARA, Y. KONISHI,
T. NOMURA, A. KONDO and M. NAITO
Control of Biofilm Formation Using Hydrophilic
Nanoparticles
J. Soc. Powder Technol. Jpn., 57 (2020), 588-592(in Japanese).

Y. TAKAHASHI, M. TSUTAOKA and M. MAEDA
Effect of SiC Crystal Orientation on Ti3SiC2formation
between SiC and Al/Ti Bi-Layered Film
Ceram. Int., (2020), In Press.
K. KASANO, Y. OGINO, S. FUKUMOTO and S. ASAI
Study on Welding Phenomena Observation Method
Based on Arc and Moltenpool Light Emission
Characteristics in Visible and Infrared Wavelength
Region:- Development of Image Sensing Technology
for In-Process Welding Monitoring Technology Q. J. Jpn. Weld. Soc., 38, 2 (2020), 103-113 (inJapanese).

T. OHMURA, K. ISHII, T. TASAKA, A. KONDO and M. NAITO
Effect of Temperature Histrory on the Thermal andMechanical Properties of Fibrous Fumed Alumina
Compacts
Netsu Bussei, 34, 4 (2020), 137-146 (in Japanese).
T. TASAKA, T. OHMURA, S. HAGIHARA, A. KONDO and
M. NAITO
Effect of Temperature Histrory on the Thermal andMechanical Properties of Fibrous Fumed Alumina
Compacts
J. Soc. Powder Technol. Jpn., 57 (2020), 612-618(in Japanese).

S. NITTA, Y. OGINO and S. ASAI
In-process Monitoring of Weld Quality in Thin Plate
Lap Welding by Using Image Sensing
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 114-124 (inJapanese).

M. NAITO and H. KAMIYA
Powder Technology Handbook, Fourth Edition(Book)
Published by CRC Press, (2020).

26

[Materials, Metallurgy & Weldability]

S.-J. LEE, S. E. SHIN, K. USHIODA and H. FUJIIMicrostructure, Mechanical Properties, and Damping
Capacity in Stir Zone after Friction Stir Welding of
Fe-17Mn Damping Alloy
J. Alloy. Compd, 803 (2020), 1155-1167.

D. PURNAMA, W. WINARTO, N. SOFYAN, A. PRIHASTOMO andK. ITOMicrostructure and Mechanical Properties of Ah-36
Steel Weldment Welded Using Magnesium Modified
E6013 ElectrodeInt. J. Technol., 11, 1 (2020), 48-59.

T. WADA, Y. MORISADA, Y. SUN, H. FUJII, Y. KAWAHITO,
M. MATSUSHITA and R. IKEDA
Friction Stir Welding of Medium Carbon Steel with
Laser-Preheating
ISIJ Int., 60, 1 (2020), 153-159.

H. OKTADINATA, W. WINARTO, E. S. SIRADJ, D. PRIADI,
H. R. MUSLIH and K. ITOStudy on Residual Stress by Neutron Diffraction in
SM570-TMC Welded by Flux-Cored Wires
Containing Different Nickel
Quarterly J. Japan Welding Soc., 38, 2 (2020),
116s-120s.

Y. HANGAI, K. TAKADA, H. FUJII, Y. AOKI, Y. AIHARA,
R. NAGAHIRO, K. AMAGAI, T. UTSUNOMIYA and
N. YOSHIKAWA
Foaming of A1050 Aluminum Precursor byGenerated Frictional Heat during Friction Stir
Processing of Steel Plate
Int. J. Adv. Manuf. Technol., 106 (2020), 3131-3137.

H. H. ZARGARI, K. ITO, T. MIWA, P. K. PARCHURI,
H. YAMAMOTO and A. SHARMA
Metallurgical Characterization of Penetration Shape
ChangeinWorkpiece
Vibration-AssistedTandem-Pulsed Gas Metal Arc Welding
Materials, 13 (2020), 3096.

Y. SUN, H. FUJII and Y. MORISADA
Double-sided Friction Stir Welding of 40 mm Thick
Low Carbon Steel Plates Using a PcBN Rotating Tool
J. Manufacturing Processes, 50 (2020), 319-328.

S. NISHIKAWA, T. HASEGAWA and M. TAKAHASHI
Effect of PWHT Conditions on Toughnessand Creep
Rupture Strength in Modified 9Cr-1MoSteel Welds
High Temp. Mater. Process., 38 (2020), 739-749.

X. LIU, Y. SUN, T. NAGIRA, K. USHIODA and H. FUJII
Effect of Process Parameters on Microstructure andMechanical Properties of Friction Stir Welded
CoCrFeNi High Entropy Alloy
Mater. Sci. Eng. A., 782 (2020).

S. NISHIKAWA, T. HASEGAWA and M. TAKAHASHI
Growth Behaviour of Creep Cracks in the Simulated
Heat-Affected Zone of Modified 9Cr-1Mo SteelMater. High Temp., 37, 4 (2020), 268-277.

Y. TOMITA and H. FUJII
Effect of Layer Thickness and Resin Addition on
Bending Strength of Sand Mold Made by Binder
Jetting Additive Manufacturing
J. JFS, 92, 5 (2020), 225-231 (in Japanese).

H. YAMAMOTO, T. NISHIURA, H. NISHIBATA, M. YONEMURA,
K. FUJIWARA, K. KAWANO and K. ITO
Surface Microstructure Modifications of Low Carbon
Steel Welds Produced by Low-Heat-Input Friction
Stir Processing
Mater. Trans., 61, 8 (2020), 1613-1619.

X. LIU, Y. SUN, T. NAGIRA, K. USHIODA and H. FUJII
Effect of Stacking Fault Energy on the Grain
Structure Evolution of FCC Metals During Friction
Stir Welding
Acta Metall. Sin., 33 (2020), 1001-1012.

H. YAMAMOTO, Y. AOYAMA, K. ITO, T. YAMADA, M. TANAKA,
H. HOSHIKAWA, A. NAGATA and T. KUMAGAI
Friction Stir Welding of Ultrahigh-Purity Aluminum
Thin Sheets Never to Lower High Conductivity at
Ultra-Low Temperature
Q. J. Jpn. Weld. Soc., 38, 4 (2020), 253-262 (inJapanese).

Y. HU, H. LIU, H. FUJII, H. ARAKI, K. SUGITA and K. LIU
Ultrasonic-induced Excess Vacancies in Friction Stir
Processing and Exploration of Acoustoplastic EffectScr. Mater., 185 (2020), 117-121.

27

Y. HU, H. LIU, H. FUJII and K. USHIODA
Effect of Ultrasound on Microstructure Evolution ofFriction Stir Welded Aluminum Alloys
J. Manufacturing Processes, 56 (2020), 362-371.

H.-J. KIM, H. FUJII and S.-J. LEE
Corrosion Behavior and Microstructure of Stir Zone
in Fe-30Mn-3Al-3Si Twinning-Induced Plasticity
Steel after Friction Stir Welding
Metals, 10, 11 (2020).

M. SAKAMURA, K. FUNAKI and H. FUJII
Study on Technical Issues and Measures for Friction
Anchor Welds between Galvannealed Steel andAluminum Alloy
J. Light Met. Weld. Const., 58, 8 (2020), 7-11 (inJapanese).

T. KAWAKUBO, T. NAGIRA, K. USHIODA and H. FUJIIFriction Stir Welding of High Phosphorus
Weathering Steel-Weldabilities,
Microstructural
Evolution and Mechanical Properties
Tetsu-to-Hagane, 106, 12 (2020), 892-901.

T. NAGIRA, X. C. LIU, K. USHIODA and H. FUJII
Mechanism of Grain Structure Development for Pure
Cu and Cu-30Zn with Low Stacking Fault Energy
during FSW
Sci. Technol. Weld. Joining, 25, 8 (2020), 669-678.

T. NAGIRA, X. C. LIU, K. USHIODA and H. FUJII
Influences of Temperature and Sn-addition on
Microstructural Evolution of Ag during FSW
Sci. Technol. Weld. Joining, 25, 3 (2020), 198-207.
M. ZHOU, X. HUANG, Y. MORISADA, H. FUJII and Y. CHINOB
Effects of Ca and Sr Additions on Microstructure,
Mechanical Properties, and Ignition Temperature of
Hot-Rolled Mg-Zn Alloy
Mater. Sci. Eng. A., 769 (2020).

H. FUJII
New Joining Methods for (Iron-Based) Automotive
Materials: ISMA-Results
J. Japan Welding Soc., 89, 6 (2020), 25-29 (inJapanese).

M. ZHOU, Y. MORISADA, H. FUJII and J.-Y. WANG
Microstructure and Mechanical Properties of Friction
Stir Welded Duplex Mg-Li Alloy LZ91
Mater. Sci. Eng. A., 773 (2020).

Y. HU, H. LIU, H. FUJII, K. USHIODA, H. ARAKI, K. SUGITA andK. LIU
Vacancy-induced Θ′Precipitation during UltrasonicAffected Friction Stir Welding of Al-Cu Alloy
J. Mater. Sci., 55 (2020), 14626-14641.

M. ZHOU, Y. MORISADA and H. FUJII
Effect of Ca Addition on the Microstructure and the
Mechanical Properties of Asymmetirc Double-sided
Friction Stir Welded AZ61 Magnesium Alloy
J. Magnes. Alloy., 8, 1 (2020), 91-102.

Y. HU, H. LIU, H. FUJII, K. USHIODA, H. ARAKI, K. SUGITA andK. LIU
Vacancy-induced Θ′ Precipitation during UltrasonicAffected Friction Stir Welding of Al-Cu Alloy
J. Mater. Sci., 55 (2020), 14626-14641.

Y. GAO, Y. MORISADA, H. FUJII and J. LIAOFriction Stir Lap Welding of Plastic to Metal Using
Adjustable Tool
Sci. Technol. Weld. Joining, 25, 3 (2020), 190-197.

A. SHARMA, H. FUJII and J. PAUL
Influence of Reinforcement Incorporation Approachon Mechanical and Tribological Properties ofAA6061- CNT Nanocomposite Fabricated via FSP
J. Manufacturing Processes, 59 (2020), 604-620.

M. ZHOU, Y. MORISADA, H. FUJII and J.-Y. WANG
Pronounced Low-Temperature Superplasticity of
Friction Stir Processed Mg–9Li–1Zn Alloy
Mater. Sci. Eng. A., 780 (2020).

R. SUZUKI, T. MASUBUCHI, S. NISHIDA, I. SHOJI, Y. HANGAI,
H. FUJII and M. MATSUBARA
Fabrication of Porous Alminum Alloy by Precursor
Method Using Vertical Type Twin-Roll Casting
J. JFS, 92, 11 (2020), 577-582 (in Japanese).

Y. MORISADA and H. FUJII
Advancement and Education of FSW Based on
Development of Equipment
J. Light Met. Weld. Const., 58, 6 (2020), 17-21 (inJapanese).

28

Y. MORISADA and H. FUJII
Medium and High Carbon Steel Joints Formed by
Friction Welding below A1 Temperature
Sci. Technol. Weld. Joining, 25, 5 (2020), 438-445.

H. LIU, Y. AOKI, Y. AOKI, K. USHIODA and H. FUJII
Principle for Obtaining High Joint Quality in
Dissimilar Friction Welding of Ti-6Al-4V Alloy and
SUS316L Stainless SteelJ. Mater. Sci. Technol., 46 (2020), 211-224.

J. W. CHOI, Y. MORISADA, H. LIU, K. USHIODA, H. FUJII,K. NAGATSUKA and K. NAKATA
Dissimilar Friction Stir Welding of Pure Ti andCarbon Fibre Reinforced Plastic
Sci. Technol. Weld. Joining, 25, 7 (2020), 600-608.

W. J. ZHANG, H. LIU, H. DING and H. FUJIISuperplastic Deformation Mechanism of the Friction
Stir Processed Fully Lamellar Ti-6Al-4V Alloy
Mater. Sci. Eng. A., 785 (2020), 139390.

X. WANG, Y. MORISADA and H. FUJII
Flat Friction Stir Spot Welding of AZ31B Magnesium
Alloy Using Double Side Adjustable Tools:
Microstructure and Mechanical Properties
Sci. Technol. Weld. Joining, 25, 8 (2020), 644-652.

T. NAGIRA, D. YAMASHITA, M. KAMAI, H. LIU, Y. AOKI, H. FUJII,K. UESUGI and A. TAKEUCHI
Time-resolved X-ray Imaging of Solidification
Cracking for Al-Cu Alloy at the Weld Crater
Mater. Charact., 167 (2020), 110469.

M. R. MUHAMAD, M. F. JAMALUDIN, F. YUSOF,
R. MAHMOODIAN, Y. MORISADA, T. SUGA and H. FUJII
Effects of Al-Ni Powder Addition on Dissimilar
Friction Stir Welding between AA7075-T6 and 304L
Materialwiss. Werkstofftech., 51 (2020), 1274-1284.

W. J. ZHANG, H. LIU, H. DING and H. FUJIIThe Optimal Temperature for Enhanced LowTemperature
Superplasticity
inFine-Grained
Ti–15V–3Cr–3Sn–3Al Alloy Fabricated by Friction Stir
Processing
J. Alloy. Compd, 832 (2020), 154917.

A. KAR, B. VICHARAPU, Y. MORISADA and H. FUJII
Elucidation of Interfacial Microstructure andProperties in Friction Stir Lap Welding of Aluminium
Alloy and Mild SteelMater. Charact., 168 (2020).

H. LIU and H. FUJII
Ultralow Rotation Speed Produces Hig-Quality Joint
in Dissimilar Friction Welding of Ti-6Al-4V Alloy and
SUS316L Stainless SteelMater. Sci. Eng. A., 800 (2020), 140303.

Y. HANGAI, D. KAWATO, M. ANDO, M. OHASHI, Y. MORISADA,
T. OGURA, H. FUJII, R. NAGAHIRO, K. AMAGAI,
T. UTSUNOMIYA and N. YOSHIKAWA
Nondestructive Observation of Pores during Press
Forming of Aluminum Foam by X-ray Radiography
Mater. Charact., 170 (2020).

B. CHEN, K. KONDOH and J. S. LI
In-situ Observation of Interaction between
Dislocations and Carbon Nanotubes in Aluminum atElevated Temperatures
Mater. Lett., 264 (2020), 127323.

M. ZHOU, Y. SUN, Y. MORISADA, K. USHIODA and H. FUJII
Quasi-in-situ Investigation into the Microstructure
and Texture Evolution of Pure Magnesium during
Friction Stir Welding
J. Magnes. Alloy., 8, 4 (2020), 1071-1083.

L. JIA, J. XU, S. LI, Z. LU, H. XIE and K. KONDOH
Reaction Kinetics of Cu-Ni and B4C in Cu-Ni Alloy
under Solid-State Sintering
Mater. Sci. Technol., 36 (2020), 759-764.
Q. YAN, B. CHEN, N. KANG, X. LIN, S. LV, K. KONDOH,
S. LI and J. S. LI
Comparison
StudyonMicrostructureandMechanical Properties of Ti-6Al-4V Alloys Fabricatedby Powder-Based Selective-Laser-Melting and
Sintering Methods
Mater. Charact., 160 (2020), 110358.

P. CHEN, H. LIU, M. NIINOMI, Z. HORITA, H. FUJII and
T. HANAWA
Fatigue Property and Cytocompatibility of a
Biomedical Co-Cr-Mo Alloy Subjected to a High
Pressure Torsion and a Subsequent Short TimeAnnealing
Mater. Trans., 61, 2 (2020), 361-367.

29

K. KONDOH, A. ISSARIYAPAT, J. UMEDA and P. VISUTTIPITUKUL
Selective Laser-Melted Titanium Materials with
Nitrogen Solid Solutions for Balanced Strength andDuctility
Mater. Sci. Eng. A., 790 (2020), 139641.

L. JIA, C. ZHANG, K. KONDOH, R. NIU, B. CHEN, S. LI and
Z. LU
Obvious Yielding Phenomenon and Selective racture
Behavior in Powder Metallurgy (TiCp+TiBw)/Ti
Composites
J. Mater. Res. Technol-JMRT, 9, 5 (2020),
10184-10188.

B. CHEN, X. Y. ZHOU, B. ZHANG, K. KONDOH, J. S. LI andQ. MA
Microstructure, Tensile Properties and Deformation
Behaviors of Aluminium Metal Matrix Composites
Co-Reinforced by Ex-Situ Carbon Nanotubes and
In-Situ Alumina Nanoparticles
Mater. Sci. Eng. A., 795 (2020), 139930.

K. KONDOH, M. FUKUO, S. KARIYA, K. SHITARA, S. LI,
A. ALHAZAA and J. UMEDA
Quantitative Strengthening Evaluation of Powder
Metallurgy Ti-Zr Binary Alloys with High Strengthand Ductility
J. Alloy. Compd, 852 (2020), 156954.

X. ZOU, M.Y. JIANG, K. CHEN, B. X. CHEN, K. M. REDDY,S. Y. ZHANG, K. KONDOH, M. WANGA, X. M. HUAA,
L. T. ZHANG and A. D. SHAN
Mechanism of Defect Formation during Friction Spot
Joining of 3D-printed TC4 Alloy and Ultra-High
Molecular Weight Polyethylene
Mater. Des., 195 (2020), 108989.

K. KONDOH, K. FUNATSU, M. TAKAHASHI, S. LI, F. AKAMATSU
and J. UMEDA
Understanding Corrosion Behavior of Magnesium
Surface by X-Ray Irradiation for Improved Surface
Design and Applications
JOM, 72, 12 (2020), 4657-4664.

K. KONDOH, E. ICHIKAWA, A. ISSARIYAPAT, K. SHITARA,
J. UMEDA, B. CHEN and S. LI
Tensile Property Enhancement by Oxygen Solutes in
Selectively Laser Melted Titanium Materials
Fabricated from Pre-Mixed Pure Ti and TiO2 Powder
Mater. Sci. Eng. A., 795 (2020), 139983.

L. JIA, M. YANG, J. CHEN, Z. LU, K. KONDOH and H. XIE
Tribological Properties of Low-Cost Titanium Alloys
by Using Rice Husk as Reinforcement
Rare Metal Mat. Eng., 49, 10 (2020), 3309-3313.
A. KHALIQ, D. J. PARKER, N. SETARGEW, K. KONDOH andQ. MA
Dissolution Kinetics of Iron-Based Intermetallic
Compounds (τ5c IMCs) in a Commercial Steel Strip
Metallic Alloy Coating Process
Metall. Mater. Trans. B, 52 (2020), 41-50.

X. ZHANG, X. HOU, D. PAN, B. PAN, L. LIU, B. CHEN,
K. KONDOH and S. LI
Designable Interfacial Structure and Its Influence on
Interface Reaction and Performance of MWCNTs
Reinforced Aluminum Matrix Composites
Mater. Sci. Eng. A., 793 (2020), 139783.

A. BAHADOR, J. UMEDA, M. MIZUTANI, E. HAMZAH, F. YUSOF
and K. KONDOH
High-Brightness and High-Power Laser Welding ofPowder
Metallurgy
Shape
MemoryAlloy:
Welding-Parameter-Dependent Microstructure
J. Mater. Eng. Perform., 29, 2 (2020), 987-996.

D. PAN, X. ZHANG, X. HOU, Y. HAN, M. CHU, B. CHEN, L. JIA,
K. KONDOH and S. LI
TiB Nano-Whiskers Reinforced Titanium Matrix
Composites
with
Novel
Nano-Reticulated
Microstructure and High Performance via Composite
Powder by Selective Laser Melting
Mater. Sci. Eng. A., 795 (2020), 140137.

B. CHEN, Z. LI, J. SHEN, S. LI, L. JIA, J. UMEDA, K. KONDOH
and J. S. LI
Mechanical Properties and Strain Hardening
Behavior of Aluminum Matrix Composites
Reinforced with Few-Walled Carbon Nanotubes
J. Alloy. Compd, 826 (2020), 154075.

30

K. KAMIYAMA, S. KARIYA, M. FUKUO, J. UMEDA and
K. KONDOH
Ductility Improvement Mechanism of Ti-6Al-4V+O
Sintered Material
Mater. Trans., 61, 3 (2020), 430-437.

P. NYANOR, A. BAHADOR, O. A. EL-KADY, J. UMEDA,
K. KONDOH and M. A. HASSAN
Improved Ductility of Spark Plasma Sintered
Aluminium-Carbon Nanotube Composite throughthe Addition of Titanium Carbide Microparticles
Mater. Sci. Eng. A., 795 (2020), 139959.

A. ISSARIYAPAT, P. VISUTTIPITUKUL, T. SONG, J. UMEDA,
Q. MA and K. KONDOH
Strength-ductility Improvement of Extruded Ti-(N)Materials Using Pure Ti Powder with High Nitrogen
Solution
Mater. Sci. Eng. A., 779 (2020), 139136.

A. ISSARIYAPAT, P. VISUTTIPITUKUL, J. UMEDA and K. KONDOH
RefinedGrain
Formation
Behavior
andStrengthening Mechanism of Α-Titanium with
Nitrogen Fabricated by Selective Laser Melting
Addit. Manuf., 36 (2020), 101537.

A. ELSAYED, J. UMEDA and K. KONDOH
Effect of Quenching Media on the Properties of TiNi
Shape Memory Alloys Fabricated by Powder
Metallurgy
J. Alloy. Compd, 842 (2020), 155931.

A. BAHADOR, J. UMEDA, R. YAMANOGLU, T. A. A. BAKAR and
K. KONDOH
Strengthening Evaluation and High-Temperature
Behavior of Ti-Fe-O-Cu-Si Alloy
Mater. Sci. Eng. A., 800 (2020), 140324.

J. SHEN, B. CHEN, J. UMEDA, J. ZHANG, Y. LI and K. KONDOHAn In-Situ Study on Deformation and Cracking
Initiation in Oxygen-Doped Commercial Purity
Titanium
Mech. Mater., 148 (2020), 103519.

A. ISSARIYAPAT, P. VISUTTIPITUKUL, T. SONG, A. BAHADOR,
J. UMEDA, Q. MA and K. KONDOH
Tensile Properties Improvement by Homogenized
Nitrogen
Solid
Solution
StrengtheningofCommercially Pure Titanium through Powder
Metallurgy Process
Mater. Charact., 170 (2020), 110700.

J. UMEDA, J. FUJITA, S. LI and K. KONDOH
Reduction Mechanism of Thermally Stable CaO
during Heating Mg-Al Composites with CaO
Particles
J. Sci. Eng. Res., 7 (2020), 85-93.

N. NISHIMURA, J. UMEDA, H. FUJII, L. JIA and K. KONDOH
Fabrication of In-situ Formed Al3Zr Reinforced Al
Sintered Composites and Their TribologicalBehaivior
J. Jpn. Soc. Powder Powder Metal., 67, 10 (2020),
536-542 (in Japanese).

J. UMEDA, H. ISHIZAKA, S. LI, A. ALHZAA and K. KONDOH
Comparison Study on Mechanical Properties of
Powder Metallurgy Titanium Materials with Nitrogen
Solutes and TiN Dispersoids
J. Alloy. Compd, 846 (2020), 156455.

K. YOKOTA, A. BAHADOR, K. SHITARA, J. UMEDA and
K. KONDOH
Mechanisms of Tensile Strengthening and Oxygen
Solid Solution in Single Β-Phase Ti-35 At.%Ta+O
AlloysMater. Sci. Eng. A., 802 (2020), 140677.

H. LUO, Y. WU, X. DIAO, W. SHI, F. FENG, F. QIAN, J. UMEDA,
K. KONDOH, H. XIN and J. SHEN
Mechanical Properties and Biocompatibility ofTitanium with a High Oxygen Concentration for
Dental Implants
Mater. Sci. Eng. C, 117 (2020), 111306.

A. BAHADOR, J. UMEDA, H. GHANDVAR, T. A. A. BAKAR,
R. YAMANOGLU, A. ISSARIYAPAT and K. KONDOH
Microstructure Globularization of High Oxygen
Concentration Dual-Phase Extruded Ti Alloys via
Powder Metallurgy RouteMater. Charact., 172 (2020), 110855.

A. BAHADOR, J. UMEDA, R. YAMANOGLU, H. GHANDVAR,
A. ISSARIYAPAT, T. A. A. B. BAKAR and K. KONDOH
Deformation Mechanism and Enhanced Propertiesof CueTiB2 Composites Evaluated by the In-Situ
Tensile Test and Microstructure Characterization
J. Alloy. Compd, 847 (2020), 156555.

31

S. SUZUKI, S. TAKENO, T. TAMURA, K. SHITARA and
M. KARASUYAMA
Multi-objective Bayesian
Optimization Using
Pareto-frontier Entropy
Proc. Int. Conf. on Machine Learning 1
pre-proceedings (ICML 2020), (2020), 6243.

S. TOKITA, K. KADOI, S. AOKI and H. INOUE
Relationship between the Microstructure and Local
Corrosion Properties of Weld Metal in Austenitic
Stainless Steels
Corrosion Sci., 175 (2020), 108867.
K. KADOI, S. UEDA, S. TOKITA and H. INOUE
Effect of MC Carbide Formation on Weld
Solidification Cracking Susceptibility of Austenitic
Stainless SteelJ. Alloy. Compd, 828 (2020), 154423.

M. KARASUYAM, H. KASUGAI, T. TAMURA and K. SHITARA
Computational Design of Stable and Highly
Ion-Conductive Materials Using Multi-Objective
Bayesian Optimization: Case Studies on Diffusion of
Oxygen and Lithium
Computational Mater. Sci., 184 (2020), 109927.

H. BABA, K. KADOTA, T. ERA, T. UEYAMA, M. MAESHIMA,
K. KADOI, H. INOUE and M. TANAKA
Single-Pass Full-Penetration Welding for StainlessSteel Using High-Current GMAW
The 73rd IIW Annual Assembly & Int. Conf.,
XII-2450-2020 (2020), 1-15.

T. TERAMAE, T. TANAKA, M. FUKUO, K. SHITARA, J. UMEDA,
S. LI, A. ALHAZAAD and K. KONDOH
AcicularMicrostructure
Formation
andStrengthening Behavior of Ti-4%Fe Alloys by Zr
Addition
J. Alloy. Compd, 858 (2020), 158292.

K. KADOI, S. TAKADA, H. INOUE, M. HOJO and Y. YOSHIOKA
Influence of Microstructural Morphology on Pitting
Corrosion Resistance of Duplex Stainless Steel Weld
MetalsQ. J. Jpn. Weld. Soc., 38, 4 (2020), 263-268 (inJapanese).

H. INOUE
Examples and Preventive Measures of Pitting
Corrosion
J. Japan Welding Soc., 89, 5 (2020), 345-346 (inJapanese).
H. INOUE
Examples and Preventive Measures of IntergranularCorrosion
J. Japan Welding Soc., 89, 5 (2020), 347-348 (inJapanese).

S. SARUWATARI, T. KAMO, Y. NAKATA, K. KADOI and
H. INOUE
Effect of Grain Boundary Migration on Intergranular
Fracture in the Weld Metal of Steels
Q. J. Jpn. Weld. Soc., 38, 4 (2020), 222-228 (inJapanese).

H. INOUE
Relationship between Microstructure and Corrosion
Behavior of Stainless Steel Weld Metals
J. Japan Welding Soc., 89, 8 (2020), 538-549 (inJapanese).

S. TOKITA, K. KADOI, Y. KANNO and H. INOUE
Microstructural Evolution and Solidification Cracking
Susceptibility of Grain Boundary Engineered Fully
Austenitic Stainless Steel
Weld. World, 64 (2020), 593-600.

W. WINARTO, A. PRIHASTOMO, E. S. SIRADJ, R. MUSLIH and
H. INOUE
Effects of Heat Input on Microstructures, Hardness,and Residual Stress of GMA Weld Dissimilar Butt
Joints between Stainless Steel SUS 316 and Marine
Steel AH 36
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 182s-185s.

S. KIRIHARA
Direct Additive Manufacturing of Fine Ceramic
Components by Laser Lithography
Ceram. Japan, 55, 2 (2020), 1-4 (in Japanese).
S. KIRIHARA
Fabrication of Biological Ceramic Implants by
Stereolithography
J. Japan Soc. Abrasive Technol., 64, 4 (2020),
181-184 (in Japanese).

K. KADOI, Y. NAKATA, H. INOUE and S. SARUWATARI
Relationship between Solidification Sequence andToughness of Carbon Steel Weld Metal
Mater. Charact., 165 (2020), 110402.

32

S. KIRIHARA
Stereolithographic Additive Manufacturing ofCeramic Components for Electromagnetic Wave
Modulation
Chem. Eng., 84, 5 (2020), 2-4 (in Japanese).

C. SAKAGUCHI, Y. NARA, T. HASHISHIN, H. ABE, M. MATSUDA,
S. TSUREKAWA and H. KUBOTA
Direct Observation of Potential Phase at Joining
Interface between P-MgO and N-MgFe2O4
Sci. Rep., 10 (2020), 17055.

T. ITO and S. KIRIHARA
Stereolithographic Additive Manufacturing of Fluid
Channels Bundles with Graded Aperture Sizes in
Thermoacoustic Converters
J. Smart Process., 9, 4 (2020), 194-198 (inJapanese).

K. HAYASHI, K. NOZAKI, Z. TAN, K. FUJITA, R. NEMOTO,
K. YAMASHITA, H. MIURA, K. ITAKA and S. OHARA
Enhanced Antibacterial Property of FacetEngineered TiO2 Nanosheet in Presence and
Absence of Ultraviolet Irradiation
Materials, 13, 1 (2020), 78(13pages).

T. SHIMIZU and S. KIRIHARA
Stereolithographic Additive Manufacturing of
Artificial Tree Models Using Sawdust Woodchips
Dispersed Resin Paste
J. Smart Process., 9, 4 (2020), 190-193 (inJapanese).

S. OHARA, T. NAKA, K. SUNAKAWA, S. KUBUKI, M. SENNA andT. HASHISHIN
Emergence of Ferromagnetism Due to Charge
Transfer in Compressed Ilmenite Powder Using
Super-High-Energy Ball Milling
Sci. Rep., 10 (2020), 5293-1-7.

T. SHIMIZU and S. KIRIHARA
Stereolithographic Additive Manufacturing of Silicon
Carbide Components
J. Smart Process., 9, 4 (2020), 185-189 (inJapanese).

M. OZAWA, K. HIGUCHI, K. NAKAMURA, M. HATTORI,
S. OHARA and S. ARAIIn Situ Observation of Catalytic CeO2-nanocube(100) Surface with Carbon Contamination by
Environmental TEM: a Model for Soot Combustion
Jpn. J. Appl. Phys., 60 (2020), SAAC04.

S. KIRIHARA
Coordination Number Modulations of Spatial Lattice
Structures
by
Stereolithographic
Additive
Manufacturing
J. Smart Process., 9, 4 (2020), 174-179 (inJapanese).

Z. DAI, J. CAO, Z. GUO, K. ZHENG, X.-F. SONG, W. WEN,
X. XU, X. QI, S. OHARA and Z. TAN
Soft X-ray-Enhanced Reactive Oxygen Species
Generation in Mesoporous Titanium Peroxide andthe Application in Tumor Synergistic Therapy
ACS Appl. Bio Mater., 3, 11 (2020), 7408-7417.

S. KIRIHARA
Laser Micro-Nano-Manufacturing and 3D Microprinting (Book)
Published by SPRINGER, (2020).

K. MAEDA, R. SUZUKI, T. SUGA and Y. KAWAHITO
Investigating Delayed Cracking Behaviour in Laser
Welds of High Strength Steel Sheets Using an X-ray
Transmission In-Situ Observation System
Sci. Technol. Weld. Joining, 25, 5 (2020), 377-382.

S. KIRIHARA
Multi-Dimensional Additive Manufacturing (Book)
Published by SPRINGER, (2020).
T. NAKA, J. VALENTA, J. KASTIL, M. MISEK, J. PRCHAL,
V. SECHOVSKY, H. ABE, T. NAKANE, M. NAKAYAMA and
T. UCHIKOSHI
Chemical and Physical Pressure Effects in the A-site
Spinel Antiferromagnetes CoM2O4(M=Al, Co, Rh)
Mater. Res. Express, 7 (2020), 056105(13pages).

33

[Mechanics, Strength & Structural Design]

G. OGITA, K. MATSUMOTO, M. MOCHIZUKI, Y. MIKAMI and
K. ITO
Evaluation of Hydrogen-induced Cracking Behavior
in Duplex Stainless Steel by Numerical Simulationof
Stress and Diffusible Hydrogen Distribution at theMicrostructural Scale
ISIJ Int., 61, 4 (2020).

N. KAWABE, H. MATSUDA, Y. OKITA, R. IKEDA, Y. MIKAMI and
M. MOCHIZUKI
Hydrogen Diffusion Simulation Model Considering
Thermal and Stress Changes in Spot Welds
Q. J. Jpn. Weld. Soc., 37, 3 (2020), 125-132 (inJapanese).

G. OGITA, K. MATSUMOTO, M. MOCHIZUKI, Y. MIKAMI and
K. ITO
Numerical Simulation on Effect of Microstructure on
Hydrogen-induced Cracking Behavior in Duplex
Stainless Steel Weld Metal
ISIJ Int., 61, 4 (2020).

N. KAWABE, H. MATSUDA, Y. OKITA, R. IKEDA, Y. MIKAMI and
M. MOCHIZUKI
Numerical Simulation of Hydrogen Diffusion
Behavior with Thermal and Stress Changes inResistance Spot Welds
Proc. National Symp. on Welding Mechanics andDesign 2019, (2020), 314-320 (in Japanese).

T. MATSUZAKI, H. MURAKAWA, N. MA, S. TSUTSUMI,
K. HIRAOKA, N. OSAWA, K. OKADA, T. TANINO, T. SHIGA and
H. YAJIMA
A Study on Fatigue Life Improvement of Welded
Joints Using Elongated Bead Welding with Low
Transformation Temperature Welding Material
J. High Pressure Inst., 58, 1 (2020), 22-38 (inJapanese).

G. OGITA, K. MATSUMOTO, M. MOCHIZUKI, Y. MIKAMI and
K. ITO
Evaluation of Hydrogen-induced Cracking Behavior
in Duplex Stainless Steel by Numerical Simulationof
Stress and Diffusible Hydrogen Distribution at theMicrostructural Scale
Tetsu-to-Hagane, 106, 4 (2020), 214-223 (inJapanese).

H. XIA, L. LI, N. MA, C. TANA and J. GONG
Influence of Energy Ratio on Dual-Spot Laser
Welded-Brazed Al/steel Butt Joint
J. Mater. Process. Technol., 281 (2020), 116624.

G. OGITA, K. MATSUMOTO, M. MOCHIZUKI, Y. MIKAMI and
K. ITO
Numerical Simulation on Effect of Microstructure on
Hydrogen-induced Cracking Behavior in Duplex
Stainless Steel Weld Metal
Tetsu-to-Hagane, 106, 4 (2020), 224-234 (inJapanese).

S. SAEKI and N. MA
Digital Twin for Metal/CFRP Resistance Spot Joining
Welding Technol., 68, 3 (2020), 45-49 (in Japanese).
B. CHANG, S. YANG, G. LIU, W. LI, D. DU and N. MA
Influences of Cooling Conditions on the Liquation
Cracking in Laser Metal Deposition of a Directionally
Solidified Superalloy
Metals, 10, 4 (2020), 466.

Y. MIKAMI
Application of Welding Residual Stress Simulation
for Enhancement of Fracture Toughness Test of
Welds
Inspection Eng., 25, 5 (2020), 61-64 (in Japanese).

H. HUANG, N. MA, J. CHEN, Z. FENG and H. MURAKAWA
Toward Large-Scale Simulation for Residual Stressand Distortion in Wire and Arc Additive
Manufacturing
Addit. Manuf., 34 (2020), 101248(10Pages).

Y. MIKAMI
Integrated Simulation of Fracture Toughness Testing
Process in Consideration of Weld Residual Stress
J. Japan Welding Soc., 89, 7 (2020), 494-498 (inJapanese).

H. XIA, C. TAN, R. TIAN, S. MENG, L. LI and N. MA
Influence of Shielding Gas on Microstructure andMechanical Properties of Laser Welded–brazed
Al/steel Lapped Joint
J. Manufacturing Processes, 54 (2020), 347-358.

34

Q. GAO, C. SHAO, H. CUI, N. MA and F. LU
Study on Fracture Toughness of 617 Ni-based Alloy
Welded Joint under Different Elevated Temperatures
J. Mater. Res., 35, 14 (2020), 1-13.

Z. TANG, H. JING, L. XU, D. CHI, L. ZHAO, Y. HAN, H. LI andN. MA
Investigation of Creep-Fatigue Crack Growth of
G115 Steel Using a Novel Damage Model
Int. J. Mech. Sci., 183, 10 (2020), 105827.

T. OHTA and N. MA
Measurement of Shot Velocity Using Particle Image
Velocimetry and Numerical Analysis of ResidualStress at Two Shot Peening Conditions,
Mech. Eng. J., 7, 4 (2020), 1-9.

J. LIN, Y. LEI, N. MA and F. GUO
Microstructural Evolution and Shear Strength ofInterface Layer between Steel and AluminumMaterials under Thermal and Mechanical Coupled
Loading
J. Manufacturing Processes, 56 (2020), 981-989.

N. MA, K. TAKADA and N. SHIMIZU
Isogeometric Analysis and Its Application to Sheet
Metal Forming Simulation
Bulletin of JSTP, 3, 31 (2020), 400-404 (inJapanese).

T. OHTA and N. MA
Shot Velocity Measurement Using Particle Image
Velocimetry and a Numerical Analysis of the
Residual Stress in Fine Particle Shot Peening
J. Manufacturing Processes, 58, 10 (2020),
1138-1149.

C. CHEN, Z. ZHANG, Q. WANG, B. ZHANG, Y. GAO,
T. SASAMURA, Y. ODA, N. MA and K. SUGANUMA
Robust Bonding and Thermal-Stable Ag-Au Joint on
ENEPIG Substrate by Micron-Scale Sinter Ag Joining
in Low Temperature Pressure-Less
J. Alloy. Compd, 828 (2020), 1-11.

Y. WANG, C. SHAO, M. FAN, N. MA and F. LU
Effect of Solidified Grain Boundary on Interfacial
Creep Failure Behavior for Steel/nickel Dissimilar
Metal Welded Joint
Mater. Sci. Eng. A., (2020), 1-9.

M. YU, H. ZHAO, F. XU, T. CHEN, L. ZHOU, X. SONG and
N. MA
Influence of Ultrasonic Vibrations on theMicrostructure and Mechanical Properties of Al/Ti
Friction Stir Lap Welds
J. Mater. Process. Technol., 282 (2020), 1-8.

Z. FENG, N. MA and F. LU
MTT and LTT Weld Metal for Reduction of Stress
Concentration and Tensile Residual Stress of
Cruciform Welded JointISOPE2020, 30, 30 (2020), 3154-3156.

P. GENG, G. QIN, J. ZHOU, T. LI and N. MA
Characterization of Microstructures and HotCompressive Behavior of GH4169 Superalloy by
Kinetics Analysis and Simulation
J. Mater. Process. Technol., 288 (2020), 116879.

H. HUANG, H. MURAKAWA, N. MA and Z. FENG
Progressive Collapse Analysis of Stiffened Panel
Structure with Consideration of Actual Welding
Distortion and Residual Stresses
ISOPE2020, 30, 30 (2020), 2962-2968.

Q. WANG, N. MA, M. TAKAHASHI, X. LUO and C. LI
Development of a Material Model for Predicting
Extreme Deformation and Grain Refinement during
Cold Spraying
Acta Mater., 199 (2020), 326-339.

T. MATSUZAKI, N. MA, H. MURAKAWA, K. HIRAOKA, Z. FENG,
K. OKADA, S. KIMURA, C. SHIGA and H. YAJIMA
A Study on Fatigue Life Improvement of Welded
Joints in All Positions and Fracture Toughness ofWeld Metal for CO2 Gas Arc Elongated Bead
Welding Method with Low Transformation
Temperature Welding Material
J. High Pressure Inst., 58, 6 (2020), 315-328.

N. MA, Y. MA and P. GENG
Thermal-Mechanical Simulation for Solid State
Joining Phenomena
SOKEIZAI, 61, 9 (2020), 1-8 (in Japanese).

35

R. GENG, J. DU, Z. WEI and N. MA
Multiscale
Modellingof
Microstructure,
Micro-segregation and Mechanical Properties of
Al-Cu Alloy in Wire and Arc Additive Manufacturing
Addit. Manuf., (2020), 1-12.

D. LIN, L. XU, H. JING, Y. HAN, L. ZHAO and F. MINAMI
Effects of Annealing on the Structure andMechanical Properties of FeCoCrNi High-Entropy
Alloy Fabricated via Selective Laser Melting
Addit. Manuf., (2020), in Press.

S. MAEDA, M. SHIBAHARA, K. NISHIHARA, H. TAKEDA,
T. MIWA, K. YAMAZAKI, T. MORIMOTO and N. MA
Study of Hot Cracking on Automatic Tandem Butt
Welding
J. Offshore Mech. Arct. Eng. (OMAE), (2020), 1-8.

T. KAWABATA, T. INOUE, T. TAGAWA, T. FUKUI, Y. TAKASHIMA,
K. SHIBANUMA and S. AIHARAHistorical Review of Research on Brittle Crack
Propagation Arresting Technology for Large Welded
Steel Structures Developed in Japan with theApplication of Kca Parameters
Mar. Struct., 71 (2020), 102737.

Z. FENG, N. MA, W. LI, K. NARASAKI and F. LU
Efficient Analysis of Welding Thermal Conduction
Using the Newton–Raphson Method, Implicit
Method, and Their Combination
Int. J. Adv. Manuf. Technol., 111 (2020), 1929-1940.

L. ZHAO, C. SHAO, Y. TAKASHIMA, F. MINAMI and F. LU
Numerical Investigation on Fracture Initiation
Properties of Interface Crack in Dissimilar Steel
Welded Joints
Chin. J. Mech. Eng., 33 (2020), 27.

Y. MA, S. NIU, H. SHAN, Y. LI and N. MA
Impact of Stack Orientation on Self-Piercing Riveted
and Friction Self-Piercing Riveted Aluminum Alloyand Magnesium Alloy Joints
Automot. Innov., 3 (2020), 242-249.

Y. LUO, R. MA and S. TSUTSUMI
Parametric Formulae for Elastic Stress Concentration
Factor at the Weld Toe of Distorted Butt-Welded
JointsMaterials, 13, 1 (2020), 169.

Y. MA, H. SHAN, S. NIU, Y. LI, Z. LIN and N. MA
A Comparative Study of Friction Self-Piercing
Riveting (F-SPR) and Self-Piercing Riveting (SPR) of
Aluminum Alloy AA5182-O
Engineering, (2020).

S. TSUTSUMI, H. NAGAHAMA and R. FINCATO
Fatigue Crack Initiation and Propagation Life of
Steels Predicted by Local Elastoplasticity Response
J. Japan Soc. Civil Eng., 75, 2 (2020), I_445-I_453(in Japanese).

S. WU, Y. MA, L. GAO, Y. ZHAO, S. RASHED and N. MA
A Novel Multi-Step Strategy of Single Point
Incremental Forming for High Wall Angle Shape
J. Manufacturing Processes, 56 (2020), 697-708.

S. TSUTSUMI, H. SHIBATA and R. FINCATO
Effect of Local Materials and Geometries of Weld
Joint Root on Fatigue Crack Initiation and
Propagation Life
J. Japan Soc. Civil Eng., 75, 2 (2020), I_467-I_476(in Japanese).

S. REN, Y. MA, S. SAEKI, Y. IWAMOTO, C. CHEN and N. MA
Fracture Mechanism and Strength Evaluation of
Al5052/CFRP Joint Produced by Coaxial One-SideResistance Spot Welding
Compos. Struct., 252, 11 (2020), 112766.

R. GADALLAH, S. TSUTSUMI, S. TANAKA and N. OSAWA
Accurate Evaluation of Fracture Parameters for a
Surface-Cracked Tubular T-joint Taking Welding
Residual Stress into AccountMar. Struct., 71 (2020), 1-20.

S. NIU, Y. MA, M. LOU, C. ZHANG and Y. LI
Joint Formation Mechanism and Performance ofResistance Rivet Welding (RRW) for Aluminum Alloyand Press Hardened SteelJ. Mater. Process. Technol., 286 (2020), 116830.

J. ROMERO-HDZ, B. N. SAHA, S. TSUTSUMI and R. FINCATO
Incorporating
DomainKnowledge
into
Reinforcement Learning to Expedite Welding
Sequence Optimization
Eng. Appl. Artif. Intell., 91 (2020), 103612.

36Q. WANG, J. SHI, L. ZHANG, S. TSUTSUMI, J. FENG and N. MA
Impacts of Laser Cladding Residual Stress andMaterial Properties of Functionally Graded Layers on
Titanium Alloy Sheet
Addit. Manuf., 35 (2020), 1-10.

S. TSUTSUMI, H. NAGAHAMA and R. FINCATO
Fatigue Crack Initiation and Propagation Life
Assessment of Butt Joint Considering the Effect ofCorrosion
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 168s-171s.

Q. WANG, X. LUO, S. TSUTSUMI, T. SASAKI, C. LI and N. MA
Measurement and Analysis of Cold Spray ResidualStress Using Arbitrary Lagrangian-Eulerian Method
Addit. Manuf., 35 (2020), 101296.

S. TSUTSUMI, G. DAIMON and R. FINCATO
Effect of Blowholes on Fatigue Crack Initiation Life of
Aluminum Alloy Lap-Joint
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 159s-162s.

Z. FENG, T. L. AUNG, C. SHAO, F. LU, S. TSUTSUMI and N. MA
A Design Method of Tensile Triangles and Low
Transformation Temperature Weld Metal for
Reduction of Stress Concentration and ResidualStress of Welded Joints
Mar. Struct., 72 (2020), 102759.

S. TSUTSUMI, T. KITAMURA and R. FINCATO
Ductile Behaviour of Carbon Steel for Welded
Structures: Experiments and Numerical Simulations
J. Constr. Steel. Res., 172 (2020), 106185.
M. MOCHIZUKI, M. SHIBAHARA, S. TSUTSUMI, Y. MIKAMI,
K. IKUSHIMA and S. OKANOTechnical Commission on Welded Structure
J. Japan Welding Soc., 89, 5 (2020), 358-365 (inJapanese).

R. GADALLAH, S. TSUTSUMI, T. YONEZAWA and H. SHIMANUKI
Measurement of Residual Stress Distribution at the
Weld Root for a U-rib Specimen Using the Contour
MethodQ. J. Jpn. Weld. Soc., 38, 2 (2020), 49s-53s.

T. KAGIMURA, Y. SHINTAKU, S. TSUTSUMI and K. TERADA
A Gurson Model Improved by Cohesive TractionSeparation Law to Realize Transition from Ductile toBrittle Fracture
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 126s-130s.

Y. KOTANI, T. TSUYAMA, S. TSUTSUMI and A. BUERLIHAN
Experimental Study for the Effect of Additional Weld
on Fatigue Strength in Out-of-Plane Gusset Welded
JointsQ. J. Jpn. Weld. Soc., 38, 2 (2020), 139s-143s.

S. TSUTSUMI, H. SHIBATA, R. FINCATO, T. YONEZAWA and
H. SHIMANUKI
Effect of Pre-overload on Fatigue Life Extension of
U-rib Steel Floor Slab Root
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 177s-180s.

R. GADALLAH, S. TSUTSUMI, T. YONEZAWA and H. SHIMANUKI
Residual Stress Measurement at the Weld Root of
Rib-To-Deck Welded Joints in Orthotropic Steel
Bridge Decks Using the Contour Method
Eng. Struct., 219 (2020), 110946.

Y. SHINTAKU, K. SOEJIMA, S. TSUTSUMI and K. TERADAAn Elastic-plastic Constitutive Law Embedding
Cohesive Cracks with Plasticity-induced Damage to
Realize Degradation of Strength and Toughness
under Cyclic Loading
Tetsu-to-Hagane, 106, 9 (2020), 662-671 (inJapanese).

S. TSUTSUMI, K. TAKAYA and R. FINCATO
Effects of Additional Weld and Grinding on Fatigue
Life Extension of Non-Load-Carrying Cruciform
JointsQ. J. Jpn. Weld. Soc., 38, 2 (2020), 172s-176s.
S. TSUTSUMI, A. BUERLIHAN, R. FINCATO, Y. KOTANI and
T. TSUYAMA
Numerical Study for the Effect of Shape of
Additional Weld on Fatigue Strength in
Out-of-Plane Gusset Welded Joint
Q. J. Jpn. Weld. Soc., 38, 2 (2020), 163s-167s.

T. UMEDA, M. SANO, S. TSUTSUMI, T. KINOSHITA and
T. TAGAWA
Influence of the Shape and the Hardness
Distribution near the Weld Toe to Strain Distribution
and Low-Cycle Fatigue Life
Steel Constr. Eng., 27, 106 (2020), 39-49 (inJapanese).

37

R. GADALLAH and S. TSUTSUMIAn Interaction Integral Retardation Model for
Predicting Fatigue Life under Multi-Step Loading
Eng. Fract. Mech., 236 (2020), 107224 (1-19).
Y. WANG, Y. LUO and S. TSUTSUMI
Parametric Formula for Stress Concentration Factor
of Fillet Weld Joints with Spline Bead Profile
Materials, 13, 20 (2020), 4639.
K. SATO, T. MATSUMOTO, S. TSUTSUMI and Y. UEMATSU
Evaluation of Fatigue Damage to Beam-Column
Welded Connections of Low-Rise Steel Buildings
Due to Wind Forces
J. Constructional Steel, 28 (2020), 956-967 (inJapanese).
T. OHTA, S. TSUTSUMI and N. MA
Direct Measurement of Shot Velocity and Numerical
Analysis of Residual Stress from Pneumatic Shot
Peening
Surf. Coat. Technol., 22, 22 (2020), 1-12.
R. FINCATO, S. TSUTSUMI, T. SAKAI and K. TERADA
3D Crystal Plasticity Analyses on the Role ofHard/soft Inclusions in the Local Slip Formation
Int. J. Fatigue, 134 (2020), 105518.
R. FINCATO and S. TSUTSUMIAn Overstress Elasto-Viscoplasticity Model for
High/low Cyclic Strain Rates Loading Conditions:
Part I - Formulation and Computational Aspects
Int. J. Solids Struct., 207 (2020), 279-294.
R. FINCATO and S. TSUTSUMIAn Overstress Elasto-Viscoplasticity Model for
High/low Cyclic Strain Rates Loading Conditions:
Part II - Numerical Analyses
Int. J. Solids Struct., 208-209 (2020), 247-261.
Y. LUO, R. MA, M. HE, R. FINCATO and S. TSUTSUMI
Experimental Research and Parametric Study on the
Fatigue Performance of Slotted Tubular Connection
Based on the Effective Notch Stress Approach
EASEC16. Lecture Notes in Civil Engineering, 101(2020), 1467-1477.

38

Joining and Welding Research Institute,
Osaka University, Japan
11-1 Mihogaoka, lbaraki, Osaka 567-0047, Japan
Telephone +81-6(6877)5111
Facsimile +81-6(6879)8689
Web Site

http://www.jwri.osaka-u.ac.jp/