| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Metastable Phases and Phase Equilibria: Towards Designing the Next Generation of Alloys
|
| Presentation Title |
Deformation Mode, Strain Path, and Strain Rate Effects on Austenite to Martensite Transformation in Gen 3 Steels |
| Author(s) |
Louis G. Hector |
| On-Site Speaker (Planned) |
Louis G. Hector |
| Abstract Scope |
Gen 3 steels, which are typically multiphase, often contain metastable retained austenite which dynamically regulates work hardening to delay necking instability during plastic straining. This occurs via the transformation induced plasticity (TRIP) effect involving the diffusionless shear transformation of austenite to martensite. Material constitutive model development for Gen 3 steel forming and component performance simulations requires measurement of the austenite volume fraction evolution with deformation mode, strain path, and strain rate. This presentation will review recently developed experimental methods for measuring austenite transformation to martensite for selected Gen 3 steels. Focus will be on homogeneous vs. inhomogeneous transformation, transformation occurring in a complex stamping with multiple deformation modes and strain paths, and the effect of strain rate on austenite stability. Model calibration and validation requirements in an Integrated Computational Materials Engineering (ICME) Framework aimed at predicting and then making new Gen 3 steels with improved properties will also be discussed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |