|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||High Performance Steels
||B2 Precipitation Strengthened Medium Mn Steel Processed by Intercitical Annealing and Aging
||Jinyoung Kim, Jinkyung Kim
|On-Site Speaker (Planned)
To enhance the yield strength of the medium Mn steel, we designed Fe-Mn-C-Ni-Al medium Mn steel having the B2 phase in the microstructure due to the addition of Ni and Al. The material was subjected to casting, homogenization, hot-rolling, cold-rolling, intercritical annealing, and aging. The intercritically annealed material consists of tempered martensite and fine ferrite/austenite with the dispersed fine B2 precipitates mainly present in the BCC constituents. The microstructure after aging is similar to that after intercritical annealing. While the fraction of tempered martensite decreases, the fraction of fine ferrite/austenite increases due to the progress of recrystallization. The size of B2 precipitates increases after aging. The aged materials show higher strength and similar ductility compared to the intercritically annealed materials. We discuss the detailed microstructure-mechanical properties relationship of the investigated materials.
||Iron and Steel, Phase Transformations,