About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Effect of Heat Treatment on the Micro-/Defect-structure and Tensile Behavior of Additively Manufactured A6061-RAM2 Aluminum Alloy |
Author(s) |
Md Faysal Khan, Reza Ghiaasiaan, Paul R. Gradl, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Md Faysal Khan |
Abstract Scope |
This study investigated the effect of heat treatment (HT) on micro-/defect-structure and room temperature tensile behavior of A6061-RAM2 alloy fabricated using laser powder bed fusion. Specimens were fabricated via reactive additive manufacturing strategy, using a mixture of Ti and B4C inoculant particles into pre-alloyed A6061 powder. These particles acted as grain boundary pinners and facilitated the formation of equiaxed grains. Effect of different post-process HTs, including hot isostatic pressing (HIP), solutionizing (SOL), and aging (AGE), conducted at varying temperatures and durations were examined. All HTs incorporating HIP greatly reduced defect content compared to non-heat-treated condition but had minimal impact on the grain structure of the alloy. It showed noticeable changes in tensile strengths and ductility with variations in SOL (at 500-530 °C for 1.5-2 hrs) and AGE (at 160-180 °C for 8-34 hrs) temperature and duration. Tensile strengths increased, while ductility decreased with higher SOL temperature and longer AGE durations. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |