Abstract
TRIP steel possesses favorable mechanical properties such as high strength, ductility and toughness and is frequently employed as structural material. To obtain the expected mechanical properties of TRIP steels through cold-working conditions, prediction and control of the material characteristics during the deformation processes are indispensable. Here, to evaluate such macroscopic characteristics as the stress-strain relationship and the average volume fraction of the overall specimen and such microscopic characteristics as shape, orientation and periodicity of the martensitic particles, uniaxial tension and compression tests, including SEM observation, for 304 austenitic stainless steels have been carried out under various environmental temperature conditions. On the basis of the experimental results, the deformation mode dependence of martensitic transformation and deformation behavior of TRIP steels are discussed. Finally, a deformation-mode-dependent transformation kinetics model is presented.
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