Inverse Analysis Method to Determine Twinning Kinetics Model Using Stress-Strain Curve
LI Li-xin,HU Sheng-de,YE Ben
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Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
To determine the twinning kinetics and the influence of twins on dislocation density and flow stress of 304 stainless steel, a constitutive relation model including the twinning kinetics was established by using dislocation theory and the stress-strain curve measured. The undetermined coefficients in this model were optimized by the tensile test data. Therefore, the model of twinning kinetics was obtained. Results for the model show that the dislocation density and flow stress increase rapidly with the increase of deformation when twins exist.
LI Li-xin,HU Sheng-de,YE Ben.
Inverse Analysis Method to Determine Twinning Kinetics Model Using Stress-Strain Curve[J]. Journal of Iron and Steel Research, 2012, 24(09): 56-58