1995 Volume 81 Issue 6 Pages 673-678
Mechanical properties of cold-rolled and continuously annealed TRIP steel with 0.14%C-1.9%Si-1.7%Mn have been discussed especially from the aspect of the plastic stability of retained austenite which was varied by changing austemper time at 400°C. The results obtained are as follows ; The plastic stability of retained austenite and the strength-ductility balance at room temperature are improved with the increase in C content in retained austenite after optimizing the austemper time in the continuous annealing process. Martensitic tranformation is considered to occur from the plastically unstable retained austenite with low C content. The kinetics model for deformation-induced martensitic transformation explains the experimentally obtained change in volume% of retained austenite with plastic strain in terms of the C content in retained austenite.
