High temperature cyclic loading experiments on synthetic forsterite single crystals. Mechanical data.

Abstract

Cyclic loading deformation experiments on [110]c oriented synthetic forsterite single crystals have been performed at about 1640K and ambient pressure, in order to confirm cyclic loading effects on deformation. Loading pattern was set as a systematic alternation of lower loading steps and higher loading steps. According to the present mechanical data, it seems that the response of strain rate to an additional stress has a hysteresis in the early period during which dislocation multiplication controls the deformation. With increasing the number of cyclic loading, dislocation glide comes to dominate the deformation, and then the hysteresis disappears.