Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 07, 2017 - October 09, 2017
To examine the effect of pre-plastic deformation of austenite phase on pearlitic transformation plasticity, three point bending tests, wherein the specimens fixed at one end and simply supported at the other were performed. First, specimens were heated to austenitization temperature, then the austenitization temperature of the specimens were kept constant for several minutes and finally cooling and loading processes were performed. During the cooling process, the specimens were subjected to the tensile stress in plastic range on the austenite phase and then, before transformation start point, the bending stress in elastic range (less than the yield stress) was applied to the specimens during the phase transformation. The maximum bending deflections due to the austenite-pearlite transformation were measured under multiple loading condition and transformation plasticity coefficients were determined. The results show that the transformation plastic deflection due to the pearlitic transformation decreases with increasing pre-plastic deformation. In addition, we proposed the equation about the relation between the pearlitic transformation plasticity coefficient and preplastic strain.
