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 Additive Manufacturing Benchmark Test Series (AM-Bench)
    
      
  AM Bench Data and Challenge Problems
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Some of the AM Bench data links are de-activated as the data management systems are upgraded to be more compatible with the AM Bench 2022 data systems.  The remaining data links will be re-activated again soon. If you need the data right away, please contact the AM Bench co-chairs.

**List of 2018 AM-Bench Measurement Results for Challenge Problems**

The following links point to summarized measurement results for the 2018 AM-Bench test challenges.  Additionally, these links provide descriptive details of the measurements, links to downloadable data files, and additional measurement data that is not associated with an AM-Bench challenge, but modelers may find useful.

It is highly recommended that modelers review the provided description and details associated with each measurement.  This will provide key information regarding measurement procedures, caveats measurement uncertainty, or important notes from scientists that conducted the measurement.

All evaluations of submitted modeling results will be conducted by the AM-Bench 2018 organizing committee.  Award plaques will be awarded at the discretion of the organizing committee.

**AMB2018-01**: Laser powder bed fusion 3D builds of nickel-based superalloy IN625 and 15-5 stainless steel test objects

**Part deflection** (CHAL-AMB2018-01-PD): Measurement results for part deflection of the as-built (no heat treatment) bridge structure before and after it is separated from the build.  Measurement results, data, and descriptions can be found here.
	**Residual elastic strains** (CHAL-AMB2018-01-RS): Neutron and synchrotron X-ray diffraction measurements of the residual elastic strain tensors at select points internal to the bridge structure.  Neutron measurement results, data, and descriptions can be found here.  X-ray measurement results, data, and descriptions for an IN625 specimen can be found here.  Also, mechanical residual stress measurements from an IN625 specimen can be found here and here.
	**Microstructure** (CHAL-AMB2018-01-MS): Measurement results for primary phases, grain size, aspect ratio, dendritic vs cellular microstructure, primary arm spacing, and elemental segregation within the thick and thin legs, as observed on transverse and longitudinal views.  Regarding phase predictions, part of this aspect of the challenge includes being able to make assumptions about what phases might be present.  Measurement results, data, and descriptions can be found here.
	**Phase fractions** (CHAL-AMB2018-01-PF): Measurement results for phases and phase fractions, including major precipitates, within the transverse samples from the thick and thin legs of the as-built 15-5 specimens.  Measurement results, data, and descriptions can be found here.
	**Phase evolution** (CHAL-AMB2018-01-PFRS): Measurement results for phases and phase fractions, including major precipitates, as a function of time for residual stress anneals of IN625 and 15-5, from transverse specimens cut from thick and thin legs. Measurement results, data, and descriptions can be found here.**AMB2018-02**: Individual laser traces on bare metal plates of IN625, using the three cases: A) 150 W, 400 mm/s, B) 195 W, 800 mm/s, C) 195 W, 1200 mm/s.  Some example data are available for case B) for model calibration.

**Note**: After experiments were performed on the AMMT, it was determined that the laser power calibration was erroneous, and the actual power was lower than commanded.  The true laser power levels for AMMT were A) **137.9 W**, 400 mm/s, B) **179.2 W**, 800 mm/s, C) **179.2 W**, 1200 mm/s.  Laser power levels for the CBM experiments are as expected.

**Melt pool geometry** (CHAL-AMB2018-02-MP): 1) In-situ measurement results for the equilibrium length of the laser melt pool as defined by the solidus temperature, from the front of the melt pool to the back.  Measurement results, data, and descriptions can be found here. 2) Predict the equilibrium size and shape of the transverse cross sections of the solidified laser traces. Measurement results, data, and descriptions can be found here.
	**Cooling rate** (CHAL-AMB2018-02-CR): In-situ measurement of the surface cooling rate at the center of the melt track, defined as the time to cool from the solidus temperature to 290 °C and/or 100 °C below the solidus temperature.  Measurement results, data, and descriptions can be found here.
	**Topography** (CHAL-AMB2018-02-TP): Measurement results of 3D surface features of the solidified laser tracks, including the height distribution perpendicular to the laser track and the geometry and spacings of the chevron features.  Measurement results, data, and descriptions can be found at the following links:
	AMB2018-02-AMMT-625-TR2-TP
		AMB2018-02-AMMT-625-TR5-TP
		AMB2018-02-AMMT-625-TR8-TP
	**Grain shapes**(CHAL-AMB2018-02-GS): Measurement results for morphology, growth direction, and other general grain characteristics observed in the transverse cross sections of the melt tracks, including EBSD data.  Measurement results, data, and descriptions can be found here.
	**Dendritic microstructure** (CHAL-AMB2018-02-DM): Measurement results for general character, length scale, and/or elemental segregation of the dendritic/cellular microstructure. Measurement results, data, and descriptions can be found here.
	**Three-dimensional structure** (CHAL-AMB2018-02-3D): Measurement results for the morphology, growth direction, and crystal orientation of grains as a function of position in the laser track. Measurement results, data, and descriptions can be found here.**AMB2018-03**: Materials extrusion polymer 3D builds of test objects.  Test object will be a rectangular coupon of polycarbonate.

**Part Thickness**(CHAL-AMB2018-03-Th): Measurement results for the thickness of the thinnest dimension of the rectangular coupon after it is separated from the build plate.  Measurement results, data, and descriptions can be found here.
	**Part Mass**(CHAL-AMB2018-03-Ma): Measurement results for mass of the coupon after it is separated from the build plate and cut.  Measurement results, data, and descriptions can be found here.
	**Part Tensile Properties**(CHAL-AMB2018-03-TP):  Measurement results for the tensile properties of the part after it is separated from the build plate and cut.  Predict the location of the failure point.  Predict the mode of failure.  Measurement results, data, and descriptions can be found here.
	**Part Void Distribution**(CHAL-AMB2018-03-VD):  Measurement results for the shape and size distribution of voids part after it is separated from the build plate and cut. Measurement results, data, and descriptions can be found here.
	**Part Cross Section**(CHAL-AMB2018-03-CS):  Measurement results for the shape and size distribution of voids within the part after it is separated from the build plate and cut.  Measurement results, data, and descriptions can be found here.**AMB2018-04**: Polymers Powder Bed Fusion: Test object will be a dogbone shape part from Nylon 12.

**Part Thickness**(CHAL-AMB2018-04-Th): Measurement results for the thickness of the thinnest dimension of the dogbone.  Measurement results, data, and descriptions can be found here.
	**Part Mass**(CHAL-AMB2018-04-Ma): Measurement results for the mass of the part after it is separated from the build plate and cut.  Measurement results, data, and descriptions can be found here.
	**Part Tensile Properties**(CHAL-AMB2018-04-TP):  Measurement results for the tensile properties of the part after it is separated from the build plate and cut.  Predict the location of the failure point.  Predict the mode of failure.  Measurement results, data, and descriptions can be found here.
	**Part Void Distribution**(CHAL-AMB2018-04-VD):  Measurement results for the shape and size distribution of voids within the part after it is separated from the build plate.  Measurement results, data, and descriptions can be found here.
	**Part Cross Section**(CHAL-AMB2018-04-CS):  Measurement results for the internal shape of a cross-section of the coupon after it is separated from the build plate and cut.  Measurement results, data, and descriptions can be found here.
	**Part Crystallinity and Melting**(CHAL-AMB2018-04-CM): Measurement results for the melt onset temperature, the melt peak temperature, the enthalpy and the crystallinity of a piece of the coupon.  Measurement results, data, and descriptions can be found here.
  Additive manufacturing

    
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Lyle E. Levine
    
      
  lyle.levine@nist.gov
  (301) 975-6032

  Brandon Lane
    
      
  brandon.lane@nist.gov
  (301) 975-5471

Created May 17, 2018, Updated December 19, 2023
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