|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Interface Migration and Carbon Partitioning during Quenching and Partitioning: Role of Interfacial Mn Partitioning
||Hao Chen, Zongbiao Dai, Chi Zhang, Zhigang Yang
|On-Site Speaker (Planned)
The effect of interfacial Mn partitioning on kinetics of the martensite/austenite interface migration and carbon partitioning during the Quenching \& Partitioning (Q&P) process in Fe-C-Mn-Si alloys has been investigated by a so called QP-LE model, in which interface condition is assumed to be Local Equilibrium (LE). The QP-LE model predicts that carbon concentration in the retained austenite after the Q&P process should be located between NPLE (Negligible Partitioning-Local Equilibrium) /PLE (Partitioning-Local Equilibrium) boundaries for the ferrite to austenite transformation and the austenite to ferrite transformation, and whether the interface migrates or not and its moving direction are quenching/ partitioning temperature and alloy composition dependent. The predictions by the QP-LE model are in good agreement with experimental results. The QP-LE model is also compared with the conventional QP-PE model in which interface condition is assumed to be Paraequilibrium (PE) and the “Constrained Carbon Equilibrium”(CCE) model.
||Planned: Supplemental Proceedings volume