|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Analysis of Misorientation Relationship between Austenite Parent and Twins
||Alex Brust, Stephen Niezgoda, Eric Payton
|On-Site Speaker (Planned)
The forward transformation from austenite to martensite in ferrous alloys can significantly influence the overall microstructural properties of the material. However, challenges remain in characterizing variant selection and interactions, especially in regards to parent austenite-twin interactions. Presented here are composition tables detailing the product variant boundary misorientation relationships for parent-parent, parent-twin and twin-twin intersections for the Kurdjumov-Sachs (KS), Nishiyama-Wassermann (NW), and some experimentally determined orientation relationships. It is established that the frequently referenced KS and NW orientation relationships produce significantly different results from experimental observations. Furthermore, the introduction of a twin into the parent austenite introduces a substantially larger number of misorientation relationships when the orientation relationship is irrational. Lastly, it is observed that some shared variants are found between twins and parents. The results and relationships may be useful towards accurate and consistent reconstructions of the parent austenite microstructure from observations of martensite.
||Planned: Supplemental Proceedings volume