|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||In-situ Synchrotron X-ray Diffraction Investigation on Strain Hardening Behavior of Fe-17Mn-1.5Al-0.3C Steel
||Yan Ma, Wenwen Song, Wolfgang Bleck
|On-Site Speaker (Planned)
The quantitative characterization of the deformation microstructure evolution in high-Mn austenitic TRIP/TWIP steel is of great importance for the understanding of its strain hardening behavior. Stacking fault energy (SFE) exhibits the decisive role to control the strain hardening behavior in high-Mn austenitic steels. In the present work, the <I>in-situ</I> high energy synchrotron X-ray diffraction (SYXRD) was applied to investigate the TRIP and TWIP effect during the deformation of Fe-17Mn-1.5Al-0.3C steel. The in-situ tensile test tracked by high-energy synchrotron X-ray diffraction was carried out and the 2D diffraction patterns were taken in every 10 seconds. The strain hardening behavior in different deformation stages was discussed with the variation of the ε-martensite and α´-martensite phase fraction, stacking faults and twin faults probability, and dislocation density. Finally, the stacking fault energy was calculated based on the synchrotron measurement and further compared with the thermodynamic calculation using subregular model.
||Planned: Supplemental Proceedings volume