Atomic group rotation mechanism of {1013} twinning in HCP materials

作者：Jiang Shan^*; Zeng Bin; Douadji Lyes

来源：International Journal of Materials Research, 2014, 105(4): 413-416.

DOI：10.3139/146.111038

• Hexagonal close-packed
• Twinning
• Atomic groups
• Mechanism
• Modeling

In this paper the mechanism of {10 (1) over bar3) twinning was studied through the application of the atomic group rotation model. The atomic displacement vectors of some selected atoms were calculated and the general formulas for calculating the displacement vectors of the twinning atoms were obtained; the atomic group rotation mechanism was then proposed. It was found that two types of alternately distributed atomic groups exist in (10 (1) over bar3) twinning as in {10 (1) over bar1} twinning. The atomic groups rotate by an angle of 6.3 degrees, and a relative displacement magnitude of 0.539a is produced. The larger relative displacement magnitude produced during twinning may be the reason that (10 (1) over bar3) twinning occurs more rarely than (10 (1) over bar1) twinning.

• 出版日期2014-4