| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
A Martensitic Transformation Kinetics Law Sensitive to Stress State Implemented in Crystal Plasticity for Modeling of Strain and Stress Driven Austenite to Martensite Transformation |
| Author(s) |
Marko Knezevic, Zhangxi Feng , Milovan Zecevic |
| On-Site Speaker (Planned) |
Marko Knezevic |
| Abstract Scope |
Austenite to martensite transformations can be stress- or strain-induced. In the former case, austenite transforms directly to alpha-martensite at pre-existing nucleation sites. In the later case, the transformation occurs during plastic deformation through a process of nucleation at intersections of slip bands forming an intermediate epsilon-martensite phase, which subsequently transforms to alpha-martensite and a process of growth. As crystallographic texture has a strong influence on the active transformation mechanisms, an elasto-plastic self-consistent (EPSC) crystal plasticity model is used as a crystallographic platform to implement a phase transformations kinetics model, which is a physically enhanced version of the Olson-Cohen kinetics model considering both epsilon and alpha martensite. The model is applied to a comprehensive set of experimental data for metastable austenitic steels recorded under a variety of stress states at different temperatures and strain rates, including an impact deformation. The implementation and insights from these predictions are discussed in this paper. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |