Mosaic Structure and Virgin Slip in Iron Single Crystal Plates

Abstract

Mosaic structures in iron single crystal plates and their bodily changes in early stages of tensile deformation are investigated from the appearances of the X-ray spectral lines and the ground figures of the Laue-spots appearing on the X-ray radiograph taken by means of the Divergent X-ray Method.
The iron single crystal plates have such a mosaic structure that it consists of many narrow grains which are arranged almost along the direction of rolling by which the plate was made before conversion into single crystal and the mutual disorientation among them is the order of one minute of arc. Deformation pattern of ground figures of Laue-spots indicates that the virgin slip already occurs at about 0.1% of stretching.