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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Computational Thermodynamics and Kinetics
Presentation Title H-18: Analysis of Microstructure and Interfacial Characteristics in Q&P Steels Using Phase-Field Model
Author(s) Hwijae Cho, Hyung-Uk Jang, Dong-Uk Kim, Seong Gyoon Kim, Pil-Ryung Cha
On-Site Speaker (Planned) Hwijae Cho
Abstract Scope Quenching and Partitioning (Q&P) processing is a key technology for developing advanced steels that simultaneously achieve high strength and ductility. In this study, we employed a Phase-Field Model to elucidate the effects of quench temperature (QT), partition temperature (PT), and partition time on carbon and substitutional-element redistribution as well as on martensite/austenite interface migration. Numerical results were benchmarked against experiments to quantify how processing parameters influence the carbon content retained in austenite, the volume fractions of martensite and retained austenite, and the resulting microstructural architecture. The optimized processing window derived from this combined simulation–experiment approach provides clear guidance for designing high-performance Q&P steels.
Proceedings Inclusion? Planned:
Keywords Computational Materials Science & Engineering, Phase Transformations, Other

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