About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructure-Sensitive Design and Advanced Characterization: An MPMD/SMD Symposium Honoring David T. Fullwood
|
| Presentation Title |
Disconnection-enabled Plastic Shear De-localization in Austenitic Stainless Steel |
| Author(s) |
Liming Xiong, Remi Dingreville, Josh Kacher |
| On-Site Speaker (Planned) |
Liming Xiong |
| Abstract Scope |
In this talk, we present results from atomistic-sensitive mesoscale simulation of plastic shear localization (PSL) in austenitic stainless steel and its comparison with experimental observations. One primary focus is to understand how the mesoscale PSL interacts with the atomically structured twin boundaries (TBs) in stainless steel by taking 316L and Alloy 709 as two sample materials. Our three major findings are: (i) TBs in stainless steel is not perfectly flat, but is often decorated with a high density of nano-sized disconnections instead; (ii) the mobility of these disconnections in different stainless steel significantly differ from each other due to the presence of different solute atoms on the TBs; (iii) the highly mobile disconnections can effectively relax the local stress concentration induced by a PSL and then de-localize it in turn. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Mechanical Properties |