|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||A Strain-induced Austenite to Martensite Transformation Kinetics Law Implemented in Crystal Plasticity for Predicting Strain-path Sensitive Deformation of Stainless Steels
||Marko Knezevic, Zhangxi Feng
|On-Site Speaker (Planned)
Austenite to martensite phase transformation during deformation in stainless steels is primarily strain-induced featuring an intermediate epsilon phase. The transformation involves partial dislocations forming shear bands of epsilon phase, which after intersecting with other shear bands give rise to alpha phase. A phase transformation kinetics law reflecting the deformation mechanism physics of transformations is implemented in an elasto-plastic self-consistent crystal plasticity model for predicting the evolution of martensite phases and mechanical properties. The model is calibrated as a standalone code using a comprehensive set of experimental data for 304L and 316L consisting of stress-strain curves and phase fractions during tension and compression at different temperatures and strain rates. The model is then used in finite elements to predict the evolution of phases, texture per phase, and geometrical changes during several deformation paths including tension, compression, and impact. The implementation and insights from these predictions are discussed in this paper.