Tensile Properties of TWIP Steel at High Strain Rate

摘要

Tensile tests of TWIP steels of two compositions are performed in the strain rate range of 10^(-5)-10~3s^(-1). Results indicate that steel 1~# does not exhibit TWIP effect but deformation-induced martensitic transformation ap- pears only.There exists TWlP effect in steel 3~#.Tensile properties at room temperature are sensitive to strain rate in the studied strain rate ranges.Analysis on the relationship between strain-hardening exponent and strain rates shows that strain-induced martensitic transformation and formation of twins during deformation have significant in- fluence on their strain-hardening behavior.