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ASTM International Conference on Additive Manufacturing – 2022The In-Situ Project: Correlating In-situ monitoring data and Non-Destructive Evaluation (NDE) methods to characterize defect populations in Laser Powder Bed Fusion (L-PBF) material
NDE is critical to enable the safe use of additive manufactured (AM) parts in aerospace applications. However, traditional NDE methods are not fully adaptable to complex AM geometries to appropriately screen for critical defects, and L-PBF processes inherently generate defects. In-situ monitoring techniques can give information about the quality of the build process and indicate process variations that could potentially create defects. Proven, causal correlations between in-situ monitoring indications and resulting defects are needed to inform about the final quality of the part. Thus, the development of a new approach is necessary. NASA started a two-phase study that would investigate techniques for characterizing defect populations in L-PBF material, first in material with induced defects, then in a nominal L-PBF process, by correlating in-situ, NDE, and serial sectioning data. Objectives also include the evaluation of seeded defect methodologies for realistic defect creation, creating a baseline of defect populations in a Qualified Material Process (QMP), characterizing the effect of heat treatment, and correlating defect populations with tensile and fatigue properties. By comparing computed tomography images, in-situ monitoring images, and metallography images, the team has been able to draw preliminary conclusions. They include a better understanding of the limitation of the NDE tools, learning about the “healing” of the samples observed during layer building and a comparison study on different laser power variation samples. Those preliminary conclusions will help dictate the follow-up work that will be presented at the conference.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Delphine Duquette
(Marshall Space Flight Center Redstone Arsenal, Alabama, United States)
Erin Leigh Lanigan
(Marshall Space Flight Center Redstone Arsenal, Alabama, United States)
James Mavo
(Jacobs Huntsville, AL)
Isabelle Sadowski
Date Acquired
October 31, 2022
Subject Category
Metals And Metallic Materials
Meeting Information
Meeting: ASTM International Conference on Additive Manufacturing (ICAM 2022)
Location: Orlando, FL
Country: US
Start Date: October 31, 2022
End Date: November 4, 2022
Sponsors: American Society For Testing and Materials
Funding Number(s)
WBS: 277385.
Distribution Limits
Public Use Permitted.
Technical Review
NASA Peer Committee
additive manufacturing
in-situ monitoring
non destructive evaluation
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