A Theory of Plastic Deformation of Metals at High Temperatures

Concerning the mechanism of plastic deformation of metals at high temperatures, a theory is presented, in which the effect of stress and temperature history is embodied. After Becker and Orowan, the concept of internal yield stress is introduced in the present theory. The internal yield stress is defined as the critical applied stress at which flow can occur without help from thermal agitations, In the theory it is assumed that, in course of...