Atomic Group Rotation Mechanism for {10\bar{1}2} Twinning of HCP Crystal Materials

Abstract

In this paper the atomic motion law of the {10\bar{1}2} twinning in hexagonal close-packed (HCP) crystal materials was studied through the atomic group rotation (AGR) model. The research results show that the AGR mechanism has universal property to all the HCP crystal materials. Though the structure of the atomic group changes with the axial ratio, the atomic motion of {10\bar{1}2} twinning in all the HCP crystal materials can be ascribed to the rotational motion of the atomic groups. The relation between the rotational angle, the relative displacement magnitude and the axial ratio was obtained. With the growth of axial ratio, the rotational angle increases, but the relative displacement magnitude decreases.