Abstract
The elastic plastic constitutive equation with the stress dependent effect on phase transformation is proposed, but there are few experimentally examples to verify its accuracy. Therefore, the transformation induced plasticity (TRIP) strain during pealrite reaction of S45C was measured when the hollow specimen was subjected to torsional stress. The transformation plasticity coefficient K was identified from experimental results, which is similar value of different stress condition by four-point bending tests from another author.
