Characterization and nondestructive inspection of additively manufactured materials

Journal Article · 08 May 2019 · AIP Conference Proceedings

DOI: https://doi.org/10.1063/1.5099707 · OSTI ID:1595042

Stair, Sarah L. ^[1]; Moore, David G. ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Additively manufactured (AM) components often exhibit significant discontinuities and indications without a clear understanding of how they might affect the mechanical properties of a part during qualification and service. This uncertainty is unacceptable for the design and manufacturing of most aerospace components. Current research in both mechanical testing and nondestructive evaluation involves developing methods for characterizing and inspecting AM components as the use of such materials continues to rise. Although several AM manufacturing methods have been developed in recent decades, this paper focuses on AM production-ready processes for a direct metal laser sintering (DMLS) powder bed fusion machine and will provide background on Sandia National Laboratories’ research efforts in this area. Tensile bar samples manufactured using the DMLS powder bed fusion method were inspected in this study, and the results of ultrasonic spectroscopy for assessing internal flaws will be presented. A combination of material property evaluation, microstructural characterization, and nondestructive inspection techniques will also be described. Finally, the results obtained from these material evaluation methods assist in determining inspection limits and methods for qualifying AM materials.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1595042
• Report Number(s): SAND-2018-9797J; 667662; TRN: US2100842
• Journal Information: AIP Conference Proceedings, Vol. 2102; Conference: 45.Review of Progress in Quantitative Nondestructive Evaluation (QNDE), Burlington, VT (United States), 15-19 Jul 2018; ISSN 0094-243X
• Publisher: American Institute of Physics (AIP)Copyright Statement
• Country of Publication: United States
• Language: English