About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
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Presentation Title |
Using Defects as ‘Fossil Records’ in Metallic Parts Produced with Electron Beam Powder Bed AM |
Author(s) |
Katie O'Donnell, Amamchukwu Ilogebe, Maria J. Quintana, Peter C. Collins |
On-Site Speaker (Planned) |
Katie O'Donnell |
Abstract Scope |
Defects in additive manufacturing are typically considered to be deleterious features and the literature has focused on the intent of reducing or eliminating defects from final parts, either during the actual additive process or with post-processing methods. However, defects can serve as microstructural informants or ‘fossil records’, recording evidence of physical phenomena at play during additive manufacturing processes. Such records help fill knowledge gaps that still exist. Analysis of a variety of defects in electron beam melted Ti-6Al-4V, Inconel 738, and Haynes 282 parts using compositional, crystallographic, and microstructural characterization methods can reveal key information about timeline and cause-effect of formation of different types of defects, including lack-of-fusion defects, solute segregation and aluminum vaporization, nonmetallic inclusions, and columnar grain growth changes, among others. The effect of different scan strategies and geometries on the resulting defect formation and retention has been studied for these three alloys. MURI and AUSMURI Collaborative Research. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Other |