|About this Abstract
|2020 TMS Annual Meeting & Exhibition
|Advanced High Strength Steels IV
|Interstitial-free Bake Hardening Realized by Epsilon-martensite Reverse Transformation
|Shaolou Wei, Menglei Jiang, Cemal Cem Tasan
|On-Site Speaker (Planned)
Benefitting from thermally- or mechanically-induced martensitic transformation, ferrous-based alloys exhibit an exceptionally broad range of strength-ductility combinations. Due to technological importance, the forward austenite-to-martensite transformation is intensively studied, whereas its reverse counterpart remains comparatively less explored and unutilized. Here in this presentation, by exploiting an interstitial-free Fe-Mn-rich alloy as a model material, we report a latent strengthening mechanism that is associated with the thermally-activated epsilon-martensite-to-austenite reverse transformation. We will show that this sort reversion-induced hardening effect can be achieved in the same time-scale and temperature range similar to the conventional bake-hardening treatment, but leads to both improved strength and cumulative ductility. We will discuss the key mechanisms regarding transformation kinetics, kinematics, strengthening and ductilization modules.
|Planned: Supplemental Proceedings volume