About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
Additively Manufactured Hastelloy-X: Effect of Post-process Heat Treatment on Microstructure and Mechanical Properties |
Author(s) |
Muztahid Muhammad, Reza Ghiaasiaan, Paul R. Gradl, Andre Schobel, Donald Godfrey, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Muztahid Muhammad |
Abstract Scope |
In this study, the effect of post-process heat treatment on the microstructure and mechanical properties of Hastelloy-X superalloy fabricated via two different additive manufacturing technologies, namely, laser beam powder bed fusion (LB-PBF) and laser powder directed energy deposition (LP-DED), is investigated. Microstructure was examined using scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD) analysis, while mechanical properties were evaluated by macro-hardness testing using the Rockwell B method. Microstructure of the alloys was studied thoroughly after several heat treatments that involve stress-relieving (at 1066°C for 1.5 hours), hot isostatic pressing (HIP at 1163°C for 3 hours under 103 MPa pressure), and/or solution treatment (at 1177°C for 3 hours). The results revealed that, for both LB-PBF and LP-DED Hastelloy-X, the post-process heat treatments resulted in uniform grain structure as well as partial dissolution of carbides, although they have different grain sizes. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |