|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Advanced High Strength Steels V
||In Situ Investigation of Stacking Fault Energy Dependent Deformation Response of a Medium-Mn Steel
||Daniel Field, Daniel Magagnosc, Ke An, Jeffrey Lloyd, Krista R. Limmer
|On-Site Speaker (Planned)
The microstructural evolution during deformation through phase transformation or twinning is determined by the temperature dependent stacking fault energy (SFE). In situ investigations were performed using neutron diffraction to determine the effect of temperature on the material response of a medium-Mn steel with a nominal composition of Fe-13Mn-3.5Cr-0.5Al-1Si-0.15C (wt. %). Quasi-static tension tests were performed at a range of temperatures from 25 to 200 °C and diffraction patterns were continuously collected. It was found that at temperatures when the stacking fault energy was calculated to be below 20 mJ/m² transformation induced plasticity was the dominant deformation mode. Twinning was measured when the fault energy exceeded 20 mJ/m²; and at 200 °C when the stacking fault energy exceeded 30 mJ/m² deformation was dominated by dislocation glide.
||Iron and Steel, Characterization, Mechanical Properties