bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fractography of Sinteraustempered and Sinterhardened Fe-3Mn-0.8C PM Steels
Authors: Tenerowicz M. , Sułowski M. 
Published: January 2017

Abstract
Sintered steels with the addition of manganese are widely used in industry because of their attractive mechanical properties. The main problem of using manganese in powder metallurgy steel production is its high affinity for oxygen. The choice of proper sintering parameters can significantly improve the properties of the final product.
For the present investigations Höganäs iron powder grade NC 100.24, low-carbon (1.3%C) ferromanganese Elkem (Eramet Norway Sauda – formerly Elkem Manganese Sauda) and graphite powder grade C-UF were used as the starting powders. Mixture of powders, containing 3% Mn and 0.8% C, was prepared in Turbula mixer for 30 minutes. Following mixing, “dog bone” compacts were pressed at 660 MPa according to PN-EN ISO 2740 standard. Sintering of compacts was carried out in the laboratory tube furnace at 1120 and 1250°C for 60 minutes in air or pure nitrogen (99.999%N2). The present investigation deals with the comparison of two heat treatment routes: sinterhardening (SH) and sinteraustempering (SAT), carried out both in air and pure nitrogen. Mechanically tested steels were investigated using JEOL JSM 700F completed with EDS. Metallography tests were carried out on 3% Nital etched samples.
In this paper the results of mechanical tests and metallography and fractography investigations are shown. According to the results obtained, it can be assumed that for sinteraustempering higher temperature does not influence mechanical properties of sintered steels. For both methods using pure nitrogen as sintering atmosphere gave better results.
Microstructure and Corrosion Resistance of Aluminium and Copper Composite Coatings Deposited by LPCS Method
Authors: Winnicki M. , Rutkowska-Gorczyca M. , Małachowska A. , Piwowarczyk T. , Ambroziak A. 
Published: January 2017

Abstract
The paper presents the study of microstructure and corrosion resistance of composite coatings (Al+Al2O3 and Cu+Al2O3) deposited by Low Pressure Cold Spraying method (LPCS). The atmospheric corrosion resistance was examined by subjecting the samples to cyclic salt spray and Kesternich test chambers, with NaCl and SO2 atmospheres, respectively. The selected tests allowed reflecting the actual working conditions of the coatings. The analysis showed very satisfactory results for copper coatings. After eighteen cycles, with a total time of 432 hours, the samples show little signs of corrosion. Due to their greater susceptibility to chloride ions, aluminium coatings have significant corrosion losses.
Reduced Glass-Transition Temperature versus Glass-Forming Ability in FeCoB-Based Amorphous Alloys
Authors: Nabiałek M. 
Published: January 2017

AbstractThis work presents studies concerning the relationship between reduction of glass transition temperatureTrgand the glass-forming ability of FeCoB-based alloys. On the basis of theoretical considerations, Turnbull [1] determined the reduced glass transition temperature (Tg/Tl) as being 2/3 of the Vogel–Fulcher–Tammann (VFT) temperature; since then, continuous research has been carried out, aiming to calculate the Trg parameter and describe its relationship with glass-forming ability. In the majority of research papers, the reduced glass transition temperature is calculated from the relationshipTg/Tm, proposed by Uhlmann and Davies [2, 3]. On the basis of differential scanning calorimetry (DSC) studies, undertaken in this current work, the values of the following temperatures have been found:Tg,Tx, Tmand Tl, in addition to the temperature ranges:ΔTx,ΔTmandΔTl. The correlation between:Tg/Tm,Tg/Tland the glass-forming ability also has been discussed. Finally, for the investigated alloys, it has been found that the relationship proposed by Turnbull is reliable over a wide range ofΔTm.
The Analysis of “Hot” Drawing Process of Trip Steel Wires at Different Initial Temperatures
Authors: Wiewiórowska S. , Muskalski Z. , Siemiński M. 
Published: January 2017

Abstract
In the work the results of preliminary research of the „hot” drawing process of TRIP steel wires at different initial temperatures has been shown.
The study is expected to find whether the „hot” drawing process, and so the increase in the temperature of the material being drawn, will block the transformation of retained austenite into martensite and, as a consequence, influence the properties of drawn wire.
Supporting the Manufacturing Process of Metal Products with the Methods of Artificial Intelligence
Authors: Wilk-Kołodziejczyk D. 
Published: January 2017

Abstract
The aim of this research programme was to develop a series of methods and solutions to support the decision-making process in foundry and materials engineering. The specific problems discussed included the selection of methods for data processing and knowledge representation formalisms, backed up by the creation of decision algorithms based on contemporary achievements of artificial intelligence, tailored to the needs of foundry industry and metallurgy. The manufacturing process of metal items is associated with many aspects, which affect the quality of end product. For process engineers responsible for the supervising and planning of production, an important feature is, among others, the diversified nature of numerous aspects of the knowledge acquisition and integration from distributed sources of information which, when made available in an appropriate manner, can support the improvement of manufacturing process.
Modified Twin-Spot Laser Welding of Complex Phase Steel
Authors: Różański M. , Morawiec M. , Grajcar A. , Stano S. 
Published: January 2017

Abstract
The work addresses modified methods of twin-spot laser welding of complex phase steel sheets and investigates the effects of laser beam distribution on the macrostructure, microstructure and hardness. The research-related results were obtained for the beam power distributions of 50%-50%, 60%-40% and 70%-30%. Test joints were made using a Yb:YAG disc laser with a maximum power of 12 kW and a welding head by means of which it was possible to focus a laser beam on two spots. It was found that the change in the laser beam distribution affects geometrical features of the joint. The application of the second beam of lower power enables obtaining tempering-like effects, which finally lead to the beneficial hardness reduction both in the fusion zone and in heat-affected zone. The identification of various microstructural constituents in different zones of the joint was performed using light microscopic micrographs and scanning electron images.
Acetylene Flow Rate as a Crucial Parameter of Vacuum Carburizing Process of Modern Tool Steels
Authors: Rokicki P. , Dychton K. 
Published: January 2017

Abstract
Carburizing is one of the most popular and wide used thermo-chemical treatment methods of surface modification of tool steels. It is a process based on carbon diffusive enrichment of the surface material and is applied for elements that are supposed to present higher hardness and wear resistance sustaining core ductility. Typical elements submitted to carburizing process are gears, shafts, pins and bearing elements. In the last years, more and more popular, especially in highly advanced treatment procedures used in the aerospace industry is vacuum carburizing. It is a process based on chemical treatment of the surface in lower pressure, providing much higher uniformity of carburized layer, lower process cost and much lesser negative impact on environment to compare with conventional carburizing methods, as for example gas carburizing in Endo atmosphere. Unfortunately, aerospace industry requires much more detailed description of the phenomena linked to this process method and the literature background shows lack of tests that could confirm fulfilment of all needed requirements and to understand the process itself in much deeper meaning. In the presented paper, authors focused their research on acetylene flow impact on carburized layer characteristic. This is one of the most crucial parameters concerning homogeneity and uniformity of carburized layer properties. That is why, specific process methodology have been planned based on different acetylene flow values, and the surface layer of the steel gears have been investigated in meaning to impact on any possible change in potential properties of the final product.
Interaction of Liquid Steel with Mould Flux in Continuous Casting Bloom Mould - Numerical Simulations and Industrial Experiences
Authors: Cwudziński A. , Jowsa J. , Przegrałek P. 
Published: January 2017

Abstract
The device under examination is a mould of a capacity of 0.5 Mg and with inner cross-section of 280×400 mm. The virtual model of the facility under investigation was made using Gambit, DesignModeler and Meshing programs. Computer simulation of the liquid steel flow and mould flux behaviour in turbulent motion conditions was done using the Ansys-Fluent® computer program. On the basis of earlier researches the volume of fluid (VOF) model was applied. Based on computer simulations carried out, steel flow and flux behaviour fields and curves of flux mould entrainment concentration were obtained. The results obtained from numerical simulation were compared with the data obtained during bloom casting under industrial conditions. Based on the obtained information on the interaction of steel with mould flux, the region was determined, in which conditions likely to favour the entrainment of slag portions into the forming bloom exist.
Physical and Numerical Investigations of Mould Flux Entrainment into Liquid Steel
Authors: Jowsa J. , Bielnicki M. , Cwudziński A. 
Published: January 2017

Abstract
This paper presents results of model tests, performed in order to analyze phenomenon of slag droplets entrainment into steel in mould, during continuous casting process. The carried out studies took the form of laboratory experiments using physical model, in which – using similarity criteria – the behaviour of interfacial boundary liquid steel-liquid slag has been simulated using water and silicon oils, differing in physicochemical properties. Additionally, based on PIV (Particle Image Velocimetry) measurements and numerical simulations, vector flow field and values of critical velocities, at which observed the occurrence of interfacial boundary silicon oil-water instability have been identified. Based on the carried out investigations, results, that illustrate relationship between critical entrainment velocity and physicochemical properties of oils have been presented.
Optimization of Steel Flow in the Tundish by Modifying its Working Area
Authors: Warzecha P. , Hutny A. M. , Warzecha M. , Merder T. 
Published: January 2017

Abstract
Presented paper describes model investigations carried out on six-strand continuous casting tundish. Numerical analysis is based on simulations performed with the use of commercial code ANSYS Fluent. The analysis concerns determination of hydrodynamic conditions of the flow in the analysed tundish, with nominal capacity of 22 Mg, and its optimisation by modification of the flow structure in the tundish working area. Four different flow control devices (FCD) were proposed.
Results of investigations presented in the paper include the distribution of velocity vectors and distribution of temperature and turbulence kinetic energy. Additionally, for more detailed comparative analysis, the macroscopic characteristics of residence time distribution (RTD) in the reactor, and the transition zone ranges were determined for each of the variants.
The Effect of Thermophysical Parameters on Temperature Distribution in the Primary Cooling Zone
Authors: Miłkowska-Piszczek K. 
Published: January 2017

Abstract
The values of thermophysical properties obtained from the experimental research, and those that were calculated with thermodynamic databases, are crucial parameters which were used in the numerical modelling of the steel solidification process. This paper presents the results of research on the impact of specific heat and enthalpy, along with the method of their implementation, on temperature distribution in the primary cooling zone in the continuous steel casting process. A cast slab – with dimensions of 1100 mm and 220 mm and a S235 steel grade – was analysed. A mould with a submerged entry nozzle (SEN), based on the actual dimensions of the slab continuous casting machine, was implemented. The research problem was solved with the finite element method using the ProCAST software package. Simulations were conducted using the “THERMAL + FLOW” module.
Optimization of Chemical Composition of the Mould Powder for Casting Ø 170 mm Billets from C45 Steel
Authors: Kania H. , Nowacki K. 
Published: January 2017

Abstract
Physico-chemical properties of mould powders and assumed casting parameters for the particular steel grade influence the way of lubricating the surface of the skin of concast billets formed in the mould, as well as heat transfer along its circumference.
The paper presents research which main aim was to improve the surface quality of continuous casting round billets (Ø 170 mm) cast from C45 steel. Improvement of the surface quality can be obtained by designing the chemical composition of mould powder for local casting conditions and the technical and technological parameters of CC equipment. Based on the experimental casting from C45 medium carbon steel it was found that there are relationships between the physicochemical properties of mould powder and intensity of skin lubrication and heat transmission to the mould wall.
Analysis of Agglomeration of Al2O3 Particles in Liquid Steel
Authors: Kalisz D. , Żak P.L. , Kuglin K. 
Published: January 2017

AbstractThe removal of non-metallic inclusions from liquid steel is a result of co-operation of fluctuation, adhesion and agglomeration effects, with emphasis on agglomeration which plays the most important role. It is based on a few types of collisions between non-metallic particles, where turbulent collisions are most prominent. As a result of agglomeration, nonmetallic inclusions are intensely removed through flotation and increase of different dimensions of inclusions, which manifests itself with the occurrence of clusters mainly composed of Al2O3precipitations. Authors investigated the agglomeration effect by making computer simulations with the use of the PSG method. The calculations were performed for a definite population of spherical particles of radiusrin the steel volume. The applied calculation method allows for analyzing the dynamics of the collision process. The assumed initial number of particles remains constant, only the number of particles in specific size-groups varies. It was also revealed that the process of agglomerates formation is much faster for particles having a bigger initial radius. In the case of very small precipitations (r=1 μm) their removal through agglomeration is very difficult because the probability those collisions can take place between them rapidly decreases.
Hypoeutectic Silumin to Pressure Die Casting with Vanadium and Tungsten
Authors: Szymczak T. , Gumienny G. , Pacyniak T. 
Published: January 2017

AbstractThe basic aim of this study is to investigate the effect of vanadium and tungsten on the crystallization process, microstructure and mechanical properties of silumin grade EN-AC 46000. The research involved a derivative thermal analysis DTA of the crystallization process, the metallographic analysis as well as the mechanical properties. The metallographic analysis was carried out on pressure die castings and made in the DTA probe. Vanadium and tungsten were added simultaneously to silumin in amount of approximately 0.1; 0.2; 0.3 and 0.4%. The DTA studies have shown the similar shape of all crystallization curves. It has been shown the additives of vanadium and tungsten in pressure die cast silumin can significantly increase its tensile strength as an well as elongation.
Austempered Ductile Iron Manufacturing Data Acquisition Process with the Use of Semantic Techniques
Authors: Wilk-Kołodziejczyk D. , Kluska-Nawarecka A.S. , Regulski K. , Adrian W. , Jaśkowiec K. 
Published: January 2017

Abstract
The aim of this work was to propose a methodology supporting the task of collecting the comparative data on studies of the mechanical properties of ADI. Collecting of research data is an important step in the process of finding the optimum design solutions for newly made products - experimental data allow us properly calibrate the manufacturing process of ADI to let the final product achieve the required properties. Parameters of the ADI production process, i.e. the time and temperature of austenitising and austempering, as well as the alloying elements added to ductile iron affect the ADI properties. The design process can use research data collected, among others, from the Web. As stated in the article, the process of data acquisition can be supported by semantic technologies, including ontologies which are descriptive logic formalism.
Statistical Assessment of the Impact of Elevated Contents of Cu and Ni on the Properties of Austempered Ductile Iron
Authors: Nawrocki P. , Kochański A. , Myszka D. 
Published: January 2017

Abstract
The article presents a statistical analysis of data collected from the observation of the production of austempered ductile iron. The impact assessment of the chemical composition, i.e. high contents of Cu and Ni on the properties of ductile iron isothermal tempered is critical to find the right chemical composition of austempered ductile iron. Based on the analyses range of the percentage of Cu and Ni which were selected in the cast iron to obtain material with high strength properties.
Microstructure and selected properties of boronized layers produced on C45 and CT90 steels after modification by diode laser
Authors: Bartkowska Aneta , Bartkowski Dariusz , Przestacki Damian , Talarczyk Małgorzata 
Published: January 2017

Abstract
The paper presents the study results of macro- and microstructure, microhardness and corrosion resistance of C45 medium carbon steel and CT90 high carbon steel after diffusion boriding and laser modification by diode laser. It was found that the increase of carbon content reduced the thickness of boronized layer and caused change in their morphology. Diffusion boronized layers were composed of FeB and Fe2B iron borides. As a result of laser surface modification of these layers, the microstructure composed of three areas: remelted zone, heat affected zone (HAZ) and the substrate was obtained. Microhardness of laser remelting boronized layer in comparison with diffusion boronized layer was lower. The presence of HAZ was advantageous, because mild microhardness gradient between the layer and the substrate was assured. The specimens with laser boronized layers were characterized by better corrosion resistance than specimens without modified layer.
Shape optimization of the modular press body
Authors: Pabiszczak Stanisław 
Published: January 2017

AbstractA paper contains an optimization algorithm of cross-sectional dimensions of a modular press body for the minimum mass criterion. Parameters of the wall thickness and the angle of their inclination relative to the base of section are assumed as the decision variables. The overall dimensions are treated as a constant. The optimal values of parameters were calculated using numerical method of the tool Solver in the program Microsoft Excel. The results of the optimization procedure helped reduce body weight by 27% while maintaining the required rigidity of the body.
Stabilisation problem in biaxial platform
Authors: Lindner Tymoteusz , Rybarczyk Dominik , Wyrwał Daniel 
Published: January 2017

AbstractThe article describes investigation of rolling ball stabilization problem on a biaxial platform. The aim of the control system proposed here is to stabilize ball moving on a plane in equilibrium point. The authors proposed a control algorithm based on cascade PID and they compared it with another control method. The article shows the results of the accuracy of ball stabilization and influence of applied filter on the signal waveform. The application used to detect the ball position measured by digital camera has been written using a cross platform .Net wrapper to the OpenCV image processing library - EmguCV. The authors used the bipolar stepper motor with dedicated electronic controller. The data between the computer and the designed controller are sent with use of the RS232 standard. The control stand is based on ATmega series microcontroller.
Generalized variational-like inclusion involving relaxed monotone operators
Authors: Irfan Syed Shakaib , Khan Mohammad F. , Farajzadeh Ali P. , Shafie Allahkaram 
Published: January 2017

Abstract
In this paper, we introduce a new class of resolvent operator, the η-proximal operator, and discuss some of its properties. We consider a new generalized variational-like inclusion problem involving relaxed monotone operators in Hilbert space and construct a new iterative algorithm for proving the existence of the solutions of our problem. Our results improve and generalize many corresponding results in the recent literature.
Reconstruction methods of the middle facial region after skin tumor removal
Authors: Aftenie C. , Bordeianu I. 
Published: January 2017

Abstract
The purpose of this paper is highlighting the treatment used for patients with skin tumours in the middle third of the face. Fear of a malign skin disease have been rising public awareness of the danger of exposure to sunlight. The probability of developing a skin tumours increases with age. Non melanocytic skin cancers are currently the most common types of cancers in Caucasians; their incidence has steadily increased worldwide in recent decades in the context of actinic aggression and increased exposure to other carcinogens, with geographic variations depending on climate, sun exposure and skin phototype. Knowing the most common forms of benign and malignant skin tumours is crucial for a proper evaluation and therapeutic management. To restore the defects resulting from excision of different types of skin tumour, were used various surgical procedures. The choice of reconstruction method was done according to the need of each patient, considering the location, size and defect results as well as medical history and level of cooperation with each patient.
Late results after a new therapeutic protocol for soft tissue management in the treatment of tibial pylon fractures
Authors: Serban Al. O. , Obada B. , Radu Georgiana , Zekra M. 
Published: January 2017

Abstract
The prospective study targets the tibial pylon fractures admitted in our clinic, to which a new treatment protocol was applied, consisting of two surgical steps, assessing in the end the results achieved at the discharge of the patient and later follows up. The study group consist of 196 patients (198 fractures), in the period 2012-2015.
The average evaluation time was of 16 months. The average age of the patients was 46.5 years (19-83 years), this type of fracture especially affecting active people. The etiology was dominated by high falls (109 cases), most of them being work related accidents. The most frequently applied osteosynthesis principle was staged osteosynthesis which consisted of first stage fibula semitubular plate osteosynthesis and external fixator tibia pylon, followed by minimally invasive or limited approach locked plate tibia pylon fixation. (64.14%) Olerud and Molander clinical score at more than one year after the last surgical intervention highlights good results: excellent results in the amount of 37% to 15% in the first lot, good results 52% to 29%, moderate success 7% to 39% and poor 4% to 17%.
Two stage surgery protocol with external fixation in emergency and minimally invasive internal fixation with locked plate performed after the dissappearance of the local edema, as the second surgical step, allows anatomically correct articular reconstruction without skin complications, with decrease of arthitic late complications.