Additive Manufacturing Benchmarks 2022 (AM-Bench 2022): Tuesday Benchmarks
Program Organizers: Brandon Lane, National Institute of Standards and Technology; Lyle Levine, National Institute of Standards and Technology

Tuesday 10:20 AM
August 16, 2022
Room: Regency Ballroom I & II
Location: Hyatt Regency Bethesda

Session Chair: Brian Simonds, National Institute of Standards and Technology


10:20 AM  Plenary
Laser-Scanned Tracks and Pads and In-situ Measurements for the 2022 Additive Manufacturing Benchmark Challenges: David Deisenroth1; Jordan Weaver1; Ho Yeung1; Sergey Mekhontsev1; Brandon Lane1; Lyle Levine1; 1National Institute of Standards and Technology
     The AMB2022-03 benchmark explores a range of individual and overlapping melt pool behaviors using individual laser tracks and 2D pads on bare IN718 plate. Single track laser scans were created with several combinations of laser power, scan speed, and spot diameter. Two 2.5 mm × 5 mm pad scans were created by scanning the laser in the ±X-direction and ±Y-direction. Then, the in-situ thermographic and laser coupling measurement approaches, data processing steps, and results will be presented. In addition to evaluation of the measurement uncertainty, a sensitivity study of the measurement results to the test uncertainty (uncertainty of process parameter values) will also be described. An overview of the machine process parameter measurements (including laser power, scan speed, and spot diameter, and more) will be given. Finally, the measurement results will be compared with anonymized challenge submission results from modelers to show the relative accuracy or trends in the models.

10:50 AM  Plenary
Characterizing the Post-build Microstructures of the AM Benchmark Artifacts: Mark Stoudt1; Maureen Williams1; Lyle Levine1; Sandra Young1; 1National Institute of Standards and Technology
    It is now well known that the AM build process creates segregated microstructures with significant differences from those of traditional wrought alloys. However, understanding the relationships between the build conditions and the concomitant microstructures is key to developing appropriate post-build heat treatments that will produce parts with reliable and predictable properties. This presentation examines the local microstructures from comprehensively characterized locations within a set of 3D builds and from individual laser traces. Detailed analyses from the sets of IN718 AM-Bench artifacts will be presented, including the solidification and post-processed microstructures, compositional heterogeneities, grain structures and orientations, and melt pool geometries. The data from the characterizations of the benchmark artifacts will be used to evaluate the fidelity of simulations submitted for the microstructure challenges.

11:20 AM  Plenary
AM Bench 2022 Thermoplastic Material Extrusion Challenge: Jonathan Seppala1; Orion Kafka1; Newell Moser1; Edward Garboczi1; 1National Institute of Standards and Technology
    The Thermoplastic Material Extrusion AM-Bench 2022 Challenge (CHAL-AMB2022-06-EW, -DCS, and -CS) asks the modeling community to predict the single-layer part dimension (i.e. width and cross-section) of an amorphous polymer from the material properties (viscoelasticity) and print parameters (temperature, rate, nozzle diameter). Two-layer samples were prepared under varying processing conditions and the cross-sections were characterized by X-ray microcomputed tomography. The material, process, and post-processing characterizations and future direction of the thermoplastic material extrusion challenge will be presented.

11:50 AM Question and Answer Period