Law of Atomic Motion during {10(1)over-bar1} Twinning in Magnesium Alloys

被引：6
作者：
Jiang, Shan [1 ,2 ,3 ]
Liu, Tianmo [1 ,2 ]
Chen, Cheng [1 ,2 ]
Jiang, Xianquan [3 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[3] Chongqing Acad Sci & Technol, Chongqing Res Ctr Adv Mat, Chongqing 401123, Peoples R China
来源：
MATERIALS TRANSACTIONS | 2011年 / 52卷 / 08期
关键词：
magnesium alloys; twinning; atomic motion; modeling; SEVERE PLASTIC-DEFORMATION; AL-ZN ALLOY; ELEVATED-TEMPERATURES; TEXTURE EVOLUTION; AZ31; ALLOY; BEHAVIOR; ECAP; SUPERPLASTICITY; MG-3AL-1ZN; DUCTILITY;
D O I：
10.2320/matertrans.MC201022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Twin types in a room-temperature compressed magnesium alloy (Mg-3Al-1Zn) sample were identified by using electron backscattered diffraction (EBSD) technique, and the results indicate that most of the twins are (10 (1) over bar2) twins and only a few of them arc {10 (1) over bar1} (twins. In order to study the law of atomic motion in the {10 (1) over bar1} twinning, we calculated the displacement vectors of the twinning atoms in the {10 (1) over bar1} twinning and found that the atomic motion can be explained through a model named quadrangular prism-shaped atomic group (QPAG). In the QPAG model there exist two types of alternately distributed QPAG units totally. Though the rotational angle of the two types of QPAG units in the (1011) twinning is smaller than in the {10 (1) over bar2} twinning, the relative displacement magnitude in the {10 (1) over bar1} twinning is larger than in the {10 (1) over bar2} twinning due to its more complicated atomic motion, and this should be the reason that the {10 (1) over bar1} twinning is harder to occur than the {10 (1) over bar2} twinning. [doi:10.2320/matertrans.MC201022]
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页码：1585 / 1588
页数：4
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