|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||High Performance Steels
||Neighborhood effects on mechanically induced martensitic transformation in QP steels
||Jiyun Kang, C. Cem Tasan, Narayan S. Pottore, Hong Zhu
|On-Site Speaker (Planned)
Understanding factors governing strain localization in QP steels is challenging, due to the presence of multiple phase constituents including metastable retained austenite. Microscopic strain partitioning among such phases is considered critical in the stability of retained austenite, which often competes with elemental partitioning effects. In this work, we integrate in situ SEM/EBSD and synchrotron XRD tensile tests to reveal the neighborhood effects on mechanically induced martensitic transformation. Our results demonstrate that local strain partitioning effects can exceed the elemental partitioning effects, highlighting the role of ferrite in controlling the transformation. Based on our findings, microstructure design strategies to improve strain hardenability of this steel will be provided.
||Iron and Steel, Phase Transformations, Characterization