| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Influence of Ni on the austenitic deformation mechanism of model Fe-Cr-Ni alloys studied using in situ synchrotron X-ray diffraction, electron microscopy, density functional theory and thermodynamic linear-response theory |
| Author(s) |
Tingkun Liu, Semanti Mukhopadhyay, Cheng-Han Li, Tianyi Li, Yang Ren, Prashant Singh, Arun Devaraj |
| On-Site Speaker (Planned) |
Tingkun Liu |
| Abstract Scope |
Composition dependent change in deformation mechanisms of austenite in stainless steels is important to understand to develop accurate predictive failure models both for stress induced failures and stress corrosion cracking of steels. Here, the deformation mechanisms of model Fe-18Cr-10Ni and Fe-18Cr-14 Ni (wt.%) alloys are studied using in-situ synchrotron X-ray diffraction during tensile testing and postmortem electron microscopy of deformed microstructure. The role of Ni on phase-stability and short-range ordering was also investigated using a thermodynamic route: Density Functional Theory and thermodynamic linear-response theory. The quantitative and qualitative analysis of the SXRD data investigates the response behavior of specific crystallographic planes, phase transformation, defects evolution to the increasing stress throughout the experiment. Combined with post-deformation microstructure analysis, calculating stacking fault energy and short range ordering, these results are directly beneficial for understanding deformation mechanisms of austenitic stainless steels based on Fe-Cr-Ni system, especially for understanding the role of Ni. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Other |