Identication of the transformation plastic coefcient of various materials and the application to heat processing simulation
- H. WAKAMATSU, T. INOUE
- Proceedings of 58th Annual Meeting, Society of…
Original scienc paper A phenomenological mechanism of transformation plasticity (TP) is discussed, in the rst part of the paper, why it takes place under a stress level even lower than the characteristic yield stress of mother phase: This is principally based on the difference in thermal expansion coefcient in both phases. Bearing in mind that it is also a kind of plastic strain, a unied plastic ow theory is derived by introducing the effect of progressing new phase into the yield function of stress, temperature and plasticity related parameters. Experimental results of the TP coefcient will be shown in the following section for some steels under tensile and compressive stress. As examples of the application of the theory and the data, metallo-thermomechanical simulation for a quenched blank gear wheel is executed to demonstrate the effect of TP.