The Additive Manufacturing Benchmark Test Series (AM-Bench) is developing a continuing series of controlled benchmark tests, in conjunction with a conference series, with two initial goals: 1) to allow modelers to test their simulations against rigorous, highly controlled additive manufacturing benchmark test data, and 2) to encourage additive manufacturing practitioners to develop novel mitigation strategies for challenging build scenarios. This dataset provides the files to allow the participants in the study (modelers) to understand the experiments and measurements and the files to facilitate the model development. Types of files include .stl files, process videos, and material information.

Additively manufactured (AM) laser powder bed fusion (PBF-L) Inconel 625 blocks were built with two different scan strategies: XY and X-only. 96 tensile specimens were extracted from blocks at different tensile axis orientations with respect to the build direction to yield the following conditions: XY scan strategy (0, 30, 45, 60, and 90 degree orientation w.r.t. build direction) and X-only scan strategy (0, 60, 90 degree orientation w.r.t. build direction). Tensile testing was performed 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 representative specimens of each scan strategy. Large-area electron backscatter diffraction was used to measure crystallographic texture and grain size/morphology for three 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. 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 for both XY and X-only scan strategies. Additionally, true stress strain curves for all XY-scan strategy, 0 degree orientation specimens are provided. Predictions are requested for the bulk/continuum stress strain behavior of as-built Inconel 625 tensile specimens at different orientations (XY-scan strategy 30, 45, 60, 90 degree orientation w.r.t. build direction) and scan strategy (X-only scan strategy 0, 60, and 90 degree orientation w.r.t. build direction).

Additively manufactured (AM) laser powder bed fusion (PBF-L) Inconel 625 blocks were built with two different scan strategies: XY and X-only. 96 tensile specimens were extracted from blocks at different tensile axis orientations with respect to the build direction to yield the following conditions: XY scan strategy (0, 30, 45, 60, and 90 degree orientation w.r.t. build direction) and X-only scan strategy (0, 60, 90 degree orientation w.r.t. build direction). Tensile testing was performed 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 representative specimens of each scan strategy. Large-area electron backscatter diffraction was used to measure crystallographic texture and grain size/morphology for three 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. 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 for both XY and X-only scan strategies. Additionally, true stress strain curves for all XY-scan strategy, 0 degree orientation specimens are provided. Predictions are requested for the bulk/continuum stress strain behavior of as-built Inconel 625 tensile specimens at different orientations (XY-scan strategy 30, 45, 60, 90 degree orientation w.r.t. build direction) and scan strategy (X-only scan strategy 0, 60, and 90 degree orientation w.r.t. build direction).

These measurements were performed as part of the 2018 Additive Manufacturing Benchmark Test Series (AM-Bench). This dataset and the associated experiments are part of a continuing series of controlled benchmark tests, in conjunction with a conference series, with two initial goals, 1) to allow modelers of Additive Manufacturing processes to test their simulations against rigorous, highly controlled additive manufacturing benchmark test data, and 2) to encourage additive manufacturing practitioners to develop novel mitigation strategies for challenging build scenarios. More information regarding the AMBench 2018 study can be found at www.nist.gov/ambench. For this year's challenge, numerous metal parts of the same geometry were created using an identical processing condition using a commercial powder bed fusion machine. The eight parts in total were manufactured in two builds. In situ thermal measurements of a select region on one of the parts within each build were acquired at 1800 frames per second. The part is a bridge structure geometry that has 12 legs of varying size (5 mm x 5 mm, 5 mm x 2.5 mm, and 0.5 mm x 5 mm), each leg is 5 mm tall, then uses a 45-degree overhang to transition into the bridge structure with a constant cross section. Each part is manufactured using 0.02 mm layer thickness, a programmed laser power of 195 W traveling at a scan speed of 800 mm/s, and the hatch spacing is 0.1 mm. The part is manufactured in 624 layers and the total build time nearly 9.5 hours. Details on the experiment can be found at www.nist.gov/ambench/amb2018-01-description, while related post-process measurement results can be found at www.nist.gov/ambench/benchmark-test-data.This dataset consists of thermal videos and MATLAB data structures for each layer. These are provided for each layer of the build and are grouped ten layers at a time in the provided zip files. The thermal videos provide an overview of the radiant temperature (not accounting for emissivity) measured during each layer, while the MATLAB structures contain the measurement data along with information on the camera timing, calibration, and process information. Two MATLAB functions are also provided. The first allows the measured radiant temperature to be converted into true temperature based on an assumed emissivity correction factor. The second function recreates the thermal video files. The second MATLAB function helps to provides context on how to interact with the MATLAB structures.For a detailed description of the dataset, please refer to the NIST Journal of Research publication, "Thermography of the Metal Bridge Structures Fabricated for the 2018 Additive Manufacturing Benchmark Test Series (AM-Bench 2018)." (in press)

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.

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.

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. These AM builds performed on the NIST Additive Manufacturing Metrology Testbed (AMMT). Description of the associated measurements and model are provided on the AMB2022-01 challenge description webpage (https://www.nist.gov/ambench), and information on the directory structure and file formats available in the 2607_README.txt file.Note that this dataset may be periodically updated. Refer to the Version number below, and updates described in this Description and the README file.

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. These AM builds performed on the NIST Additive Manufacturing Metrology Testbed (AMMT). Description of the associated measurements and model are provided on the AMB2022-01 challenge description webpage (https://www.nist.gov/ambench), and information on the directory structure and file formats available in the 2607_README.txt file.Note that this dataset may be periodically updated. Refer to the Version number below, and updates described in this Description and the README file.

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.

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.