| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Stacking Fault Energy Dependent Deformation Mechanisms in Medium-Mn Steels |
| Author(s) |
Krista R. Limmer, Daniel Field, Daniel Magagnosc, Timothy Walter, Christopher Meredith, Jeffrey Lloyd |
| On-Site Speaker (Planned) |
Krista R. Limmer |
| Abstract Scope |
Medium-Mn steels with a range of stacking fault energy (SFE) values were mechanically tested at a range of temperatures and strain rates and characterized to determine the dominant deformation mechanisms: twinning, phase transformation, or dislocation glide. The temperature and rate dependence of twinning and phase transformation is a function of the alloy dependent intrinsic stacking fault energy as well as the unstable stacking fault energy (USFE). Empirical models were used to predict the composition dependent SFE and first principles calculations were used to determine USFE in representative medium-Mn alloys. Temperature and rate effects on the effective stacking fault energy and resulting deformation mechanisms are discussed in terms of ex-situ characterization, in-situ neutron diffraction, and Taylor impact tests. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Modeling and Simulation, Mechanical Properties |