|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||High Performance Steels
||NOW ON-DEMAND ONLY – The Influence of Temperature on the Strain-hardening Behavior of
Fe-22/25/28Mn-3Al-3Si TRIP/TWIP Steels
||Dean Pierce, Jake Benzing, Jose Jiménez, Tilmann Hickel, Ivan Bleskov, Jong Keum, Dierk Raabe, Jim Wittig
|On-Site Speaker (Planned)
The influence of temperature and stacking fault energy (SFE) on the strain-hardening behavior, microstructural evolution, and critically resolved shear stress for mechanical twinning was investigated for three Fe–22/25/28Mn–3Al–3Si wt.% transformation- and twinning-induced plasticity (TRIP/TWIP) steels. The intrinsic SFEs were calculated by two different methods, density functional theory and statistical thermodynamic modeling. The steels were systematically mechanically tested at elevated temperatures and their dislocation and defect structures characterized by optical and transmission electron microscopy. New insight into factors controlling controlling mechanical twinning and the critical resolved shear stress for twinning at elevated temperatures were discovered.