| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Recrystallization Kinetics of 316L Stainless Steel Processed by Laser Powder Bed Fusion (LPBF) |
| Author(s) |
Edouard De Sonis, Sylvain Dépinoy, Pierre-François Giroux, Hicham Maskrot, Louis Lemarquis, Olivier Hercher, Flore Villaret, Anne-Françoise Gourgues-Lorenzon |
| On-Site Speaker (Planned) |
Edouard De Sonis |
| Abstract Scope |
In this study, the post-manufacturing recrystallization kinetics at two temperatures for two 316L stainless steels produced by laser powder bed fusion (LPBF) were compared. The obtained as-built microstructures differed in grain size, grain boundary character distribution, and nano-inclusion population. Strong differences in recrystallization kinetics were observed. Specific thermal cycles allowed to attribute these differences to an inhibition of the formation of the first recrystallized grains in the steel initially exhibiting the finest grains, the lowest density of low angle boundaries (LABs), and the highest volume fraction of nano-inclusions. A high density of LABs, originating from solidification in the particular case of the LPBF process, favored recrystallization by locally increasing the energy stored near grain boundaries and thus promoting the formation of new recrystallized grains. This work opens a way to the development of low-density LAB microstructures with enhanced microstructural stability under high temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Additive Manufacturing, Other |