抄録
The crystal rotation of metal single crystals during tensile deformation is possible only when crystal bending regions are plastically formed. The object of the present investigation is to obtain the information about the plastic bending of a crystal during tensile deformation by measuring the minor discontinuity of the crystal rotation in copper and aluminium crystals.
Minor discontinuity of the crystal rotation was continuously measured by the new method. The crystal rotation in the first stage was continuous and always occurred in the same direction, whereas it became abruptly discontinuous immediately after the deformation entered the second stage; for example, the reversal and the temporary stop of the crystal rotation were observed.
Evaluation of the bending stress caused by the non-rotating grip was carried out in a copper crystal. The results have indicated that the bending stress reaches a large value enough to activate the latent slip in the early stage of deformation.
