| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Martensitic Transformations and Shear-band Interactions in Austenitic Stainless Steel: Effects of Hydrogen |
| Author(s) |
Douglas L. Medlin, Julian E.C. Sabisch, James E. Nathaniel, Joshua D. Sugar, Joseph A. Ronevich, Christopher W. San Marchi |
| On-Site Speaker (Planned) |
Douglas L. Medlin |
| Abstract Scope |
The formation of deformation bands in austenitic stainless steels is often linked to shear-coupled crystallographic transformations, including twinning and the formation of ε-martensite, and can be sensitive to the presence of hydrogen. The interplay between strain and atomic shuffling in these bands can also drive further processes, such as the nucleation and growth of the α'-martensite phase at deformation band intersections. Here, we discuss electron microscopic observations of such bands and their relationship to grain boundaries and dislocation cell-walls in an austenitic stainless steel (304L), with and without hydrogen charging. Diffraction contrast STEM, nano-beam diffraction, and atomic-resolution observations provide fundamental insight concerning the elementary processes governing the nanoscale evolution of these structures.
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the USDOE’s NNSA under contract DE-NA-0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Phase Transformations, Characterization |