Tensile Strain Hardening Behavior of FeMnC TWIP Steels
ZHOU Xiaofen1，FU Renyu1，SU Yu1，2，LI Lin1
1.School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China；2.School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
Abstract：The strain hardening behaviour of FeMnC TWIP steel was investigated. It was showed there existed different n values in different phases during the tensile strain hardening of samples. There were also two strain hardening mechanisms: in the region of 0.4%3% strain, samples were strengthened by dislocation piling, but in the region of 10%50% strain, by twinning. In these two regions, the n value kept constant, However, n increased continuously in the region of 4%10%. The microstructure observation showed that the fractures of the FeMnC TWIP steel were typical ductile fracture pattern.
2009, Vol. 44 
