|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Design of Duplex Stainless Steels with TRIP Effect: Link between Composition, Phase Stability and Plasticity
||Audrey Lechartier, Alexis Deschamps, Marc Mantel, Guillaume Parry, Muriel Veron
|On-Site Speaker (Planned)
High strength, high ductility lean duplex stainless steels gain an optimum combination of properties by tuning the level of instability of the austenite phase with respect to strain-induced phase transformation. In this presentation, we present a systematic evaluation of varying the alloy composition to monitor austenite stability while keeping an equal proportion of austenite and ferrite. The strain-induced transformation is evaluated during in-situ testing with high energy synchrotron X-ray diffraction analysis. It is related to strain hardening and to the tendency for macroscopic strain localization, evaluated by digital image correlation. The stress-strain behavior and strain-induced phase transformation rate in the duplex alloys are compared to that in purely ferritic and austenitic alloys of the same composition as in the duplex microstructure, and the mechanical behavior of the duplex alloy is modelled as a function of the constitutive behavior of the two phases and of the phase transformation rate.
||Planned: Supplemental Proceedings volume