| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Microstructure Evolution and Kinetics in Post Heat-Treatment of 316H Stainless Steel Fabricated by Laser Powder Bed Fusion |
| Author(s) |
Lin Gao, Srinivas Aditya Mantri, Xuan Zhang |
| On-Site Speaker (Planned) |
Lin Gao |
| Abstract Scope |
Laser powder bed fusion (LPBF) is a prominent metal additive manufacturing (AM) technology for producing structural components. Performing heat-treatment is an effective approach to mitigate microstructure heterogeneity and modify the mechanical properties of as-built products. A comprehensive understanding of microstructure evolution and kinetics during heat treatment is essential for designing and optimizing post-treatment strategies for AM components. 316H stainless steel is a material widely used in the nuclear industry. This study investigated various solution-annealing conditions applied to initiate the recovery or recrystallization of 316H stainless steel fabricated using LPBF. In-situ high-energy synchrotron X-ray characterization techniques, including small-angle (SAXS) and wide-angle (WAXS) X-ray scattering, were employed to study the microstructure evolution during solution annealing, focusing on phenomena such as dislocation recovery, particle coarsening, and composition homogeneity. Furthermore, creep tests and room-temperature tensile loading were conducted to explore the relationship between the annealed microstructure and the mechanical properties of AM 316H samples. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Other |