Microstructure-Mechanical Properties Relationships for Medium-Mn Steel
(Room 202A)
09 May 17
2:00 PM
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2:30 PM
Tracks:
Metallurgy, Processing & Characterization of AHSS
This presentation will focus on the aspects of the mechanical properties of medium-Mn steels that have not received much attention, but still require an in-depth analysis. The tensile properties of ultrafine-grained, intercritically annealed, medium-Mn steel reveal a complex dependence on the intercritical annealing temperature. The kinetics of deformation twinning and strain-induced transformation in the ultrafine-grained austenite play a prominent role in determining the strain hardening of medium-Mn steel. While excellent strength-ductility combinations are obtained when deformation twinning and strain-induced transformation occurred gradually and in sequence, large elongations are also observed when strain-induced transformation plasticity is not activated.