Relation of flow stress to the mean-square amplitude of atomic vibrations in cubic metals.

Abstract

The critical resolved shear stress (CRSS) of 14 face-centered- and body-cubic elements in the temperature range 0 to 300 K has been examined as a function of the mean-square amplitude of atomic vibration measured at room temperature. It is found that the CRSS of elements with a given crystals structure is a unique fonction of . For a given temperature and crystal structure, the CRSS decreases as increases. The dislocation lines composed of atoms with large value have low line tension, and are easy to move in the slip plane of the crystal, resulting in a low CRSS value