Mechanisms of Strain Hardening of B.C.C. Polycrystals and Stress-Strain Curve

摘要

Behaviour of the misorientation and size of deformation cells in high plastic deformation of b.c.c. polycrystals is analysed on the basis of original and litera-ture data. It is determined that the average misorientation angle adheres to the law #omega#=#alpha#e~(3/2), where a is a coefficient and e is a true strain, and average size of dislocation cells is governed by the dependence d = K/(#DELTA#o" + K'e), where K, K, and #DELTA##sigma#" are constants of the material in a given structural state. The structural changes are compared with the work hardening curve.