| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
| Presentation Title |
Hydrogen Trapping at Grain Boundaries and Dislocation Structures in Additively-manufactured Stainless Steel 316L Evaluated via SIMS/EBSD |
| Author(s) |
Kaila Morgen Bertsch, Peter Weber, Shohini Sen-Britain, Chris San Marchi, Thomas Voisin, Morris Wang, Brandon Wood |
| On-Site Speaker (Planned) |
Kaila Morgen Bertsch |
| Abstract Scope |
Stainless steel (SS) 316L is frequently used in hydrogen-rich environments due to its superior resistance to degradation and embrittlement. Additively manufactured (AM) SS 316L exhibits distinctive cellular microstructures with segregation that can fundamentally change the material response. Qualifying AM SS 316L components requires defining the interactions of these novel microstructures with hydrogen. In this study, hydrogen trapping was compared in deuterium gas-precharged AM SS 316L components in the as-fabricated state, after recrystallization annealing, and after annealing + prestraining to create equiaxed dislocation cells. EBSD orientation mapping of grain structures and orientations and backscattered electron imaging of AM dislocation structures was combined with ToF-SIMS/NanoSIMS compositional mapping to reveal the spatial distributions of hydrogen. The trapping ability of the AM dislocation structures with segregation were compared to that of conventional dislocation structures and that of high- and low-angle grain boundaries to evaluate the response of AM SS316L to use in hydrogen environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Environmental Effects |