AM Bench 2022 challenge problem Subcontinuum Mesoscale Tensile Test (CHAL-AMB2022-04-MeTT)
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One additively manufactured (AM) laser powder bed fusion (PBF-L) Inconel 625 mesoscale tensile specimen (gauge dimensions approximately 0.2mm x 0.2 mm x 1mm) was extracted from build AMB2022-CBM-B1 specimen TH1 and tested at room temperature using a quasistatic strain rate of 0.001/s to failure. Microstructure was measured using x-ray computed tomography (XRCT) and scanning electron microscopy (SEM) techniques on the specimen gauge section or adjacent material. Large-area electron backscatter diffraction was used to measure crystallographic texture and grain size/morphology of the entire gauge section and two orthogonal planes. Backscatter electron imaging was used to characterize the subgrain structure and assess recast layer thickness from electric discharge machining. Electron channeling contrast imaging was used to estimate dislocation density. XRCT was used to analyze the pore population as well as uncertainty in cross-sectional area for stress calculations. Literature sources were used to estimate phase fraction, residual stress, and the single crystal C-tensor. All processing details, specimen preparation details, tensile test method details, and microstructure measurements are provided. Predictions are requested for the subcontinuum stress strain behavior and fracture pathway of one as-built IN625 meso-scale specimen.
AM Bench 2022 Microstructure Measurements for IN718 3D builds
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The following data files include microstructure measurement results associated with the 2022 Additive Manufacturing Benchmark test series (AM-Bench 2022) AMB2022-01 benchmark on laser powder bed fusion (LPBF) 3D builds of nickel-based superalloy IN718 test objects. The AM builds were performed on the NIST Additive Manufacturing Metrology Testbed (AMMT) and the microstructure measurements were conducted using scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultra-small-angle X-ray scattering (USAXS), small-angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS), and automated serial sectioning. Detailed descriptions of the build process parameters, scan pattern, heat treatment, and descriptions of all of the AMB2022-01 measurements are provided on the AMB2022-01 challenge description webpage (https://www.nist.gov/ambench/amb2022-01-benchmark-measurements-and-challenge-problems).Due to the time-sensitive nature of the AM Bench challenge problems, those measurements and analyses were prioritized. The challenges that this data publication address are:Microstructure (CHAL-AMB2022-01-MS): Histograms of direction-specific grain sizes from specified regions within as-built and heat-treated samples.Phase Evolution (CHAL-AMB2022-01-PE): Formation and evolution of phases and phase fractions, including major precipitates, as a function of time for heat treatments of IN718 from a 2.5 mm leg.The data provided for CHAL-AMB2022-01-PE are preliminary since an additional phase in the as-build material has not yet been positively identified. These data will be updated shortly. Also, additional datasets that are not required for the challenges will be added soon. For updates, please check back here or at www.nist.gov/ambench.
AM Bench 2022 IN625 3D Build Microstructure Modeling Challenge Description Data (AMB2022-05)
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The following data files are provided in support of the AM Bench 2022 modeling challenges associated with Microstructure measurement extension to AMB2018-01: laser powder bed fusion (LPBF) 3D builds of nickel-based superalloy IN625 test objects (AMB2022-05). Description of the associated measurements are provided in the AMB2022-05 challenge description webpage (https://www.nist.gov/ambench).Some of the work was supported by the Exascale Additive Manufacturing Application Development Project, part of the Exascale Computing Project, (17-SC-20-SC), a collaborative effort of U.S. DOE Office of Science and NNSA. Lawrence Livermore National Security, LLC.
AM Bench 2022 IN625 3D Build Microstructure Modeling Challenge Description Data (AMB2022-05)
공공데이터포털
The following data files are provided in support of the AM Bench 2022 modeling challenges associated with Microstructure measurement extension to AMB2018-01: laser powder bed fusion (LPBF) 3D builds of nickel-based superalloy IN625 test objects (AMB2022-05). Description of the associated measurements are provided in the AMB2022-05 challenge description webpage (https://www.nist.gov/ambench).Some of the work was supported by the Exascale Additive Manufacturing Application Development Project, part of the Exascale Computing Project, (17-SC-20-SC), a collaborative effort of U.S. DOE Office of Science and NNSA. Lawrence Livermore National Security, LLC.
AM Bench 2022 Residual Elastic Strain, Residual Stress, and Part Deflection Measurements for IN718 3D Builds
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The following data files include residual elastic strain, residual stress, and part deflection results associated with the 2022 Additive Manufacturing Benchmark test series (AM Bench 2022) AMB2022-01 benchmark on laser powder bed fusion (LPBF) 3D builds of nickel-based superalloy IN718 test objects. The AM builds were performed on the NIST Additive Manufacturing Metrology Testbed (AMMT). The residual elastic strains were measured using synchrotron X-ray diffraction at the Cornell High Energy Synchrotron Source (CHESS) and neutron diffraction at the Oak Ridge National Laboratory (ORNL) High Flux Isotope Reactor (HFIR). Residual stresses were characterized using the contour method by UC Davis and Hill Engineering. Part deflection after partial cutting of the build part off the build plate was measured at NIST. Detailed descriptions of the build process parameters, scan pattern, heat treatment, and descriptions of all of the AMB2022-01 measurements are provided on the AMB2022-01 challenge description webpage (https://www.nist.gov/ambench/amb2022-01-benchmark-measurements-and-challenge-problems). Due to the time-sensitive nature of the AM Bench challenge problems, those measurements and analyses were prioritized. The challenges that this data publication address are:Residual elastic strain (CHAL-AMB2022-01-RS): Residual elastic strain components at select locations internal to the bridge structure, corresponding to synchrotron X-ray diffraction measurements. Part deflection (CHAL-AMB2022-01-PD): Deflection of the as-built (no heat treatment) bridge structure after it is partially separated from the build plate.Additional datasets that are not required for the challenges will be added soon. For updates, please check back here or at www.nist.gov/ambench.
AM Bench 2022 3D Build with Custom Laser Scan Strategies Modeling Challenge (AMB2022-02)
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The following data files are provided in support of the 2022 Additive Manufacturing Benchmark test series (AM-Bench 2022) modeling challenges associated with laser powder bed fusion (LPBF) 3D builds of nickel-based superalloy IN718 test objects using variety of custom scan strategies. These AM builds were performed on the NIST Additive Manufacturing Metrology Testbed (AMMT, https://www.nist.gov/el/ammt-temps). Note that these 3D builds are an extension of those for the AMB2022-01 challenges, and part geometry, materials data, and 'nominal' 3D build data are available in the corresponding data repository (https://doi.org/10.18434/mds2-2607)Description of the associated 3D builds and measurements are provided on the AMB2022-02 challenge description webpage (https://www.nist.gov/ambench). Note that this dataset may be periodically updated. Refer to the Version number below, and updates described in this Description and the README file.
AM Bench 2022 3D Build with Custom Laser Scan Strategies Modeling Challenge (AMB2022-02)
공공데이터포털
The following data files are provided in support of the 2022 Additive Manufacturing Benchmark test series (AM-Bench 2022) modeling challenges associated with laser powder bed fusion (LPBF) 3D builds of nickel-based superalloy IN718 test objects using variety of custom scan strategies. These AM builds were performed on the NIST Additive Manufacturing Metrology Testbed (AMMT, https://www.nist.gov/el/ammt-temps). Note that these 3D builds are an extension of those for the AMB2022-01 challenges, and part geometry, materials data, and 'nominal' 3D build data are available in the corresponding data repository (https://doi.org/10.18434/mds2-2607)Description of the associated 3D builds and measurements are provided on the AMB2022-02 challenge description webpage (https://www.nist.gov/ambench). Note that this dataset may be periodically updated. Refer to the Version number below, and updates described in this Description and the README file.