The influence of temperature on twinning behavior of a Mg-Gd-Y alloy during hot compression

被引：26
作者：
Lu, S. H. [1 ,2 ]
Wu, D. [1 ]
Chen, R. S. [1 ]
Han, En-hou [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 735卷
基金：
中国国家自然科学基金;
关键词：
Mg-Gd-Y alloy; Hot compression; Twin variant selection; Schmid factor; POLYCRYSTALLINE MAGNESIUM ALLOY; CLOSE-PACKED METALS; MECHANICAL-PROPERTIES; VARIANT SELECTION; ZR ALLOY; RECRYSTALLIZATION MECHANISMS; ROOM-TEMPERATURE; GRAIN-SIZE; DEFORMATION; MICROSTRUCTURE;
D O I：
10.1016/j.msea.2018.08.004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure evolution and plastic deformation mechanism of Mg-6.58Gd-5.7Y-0.55Zr alloy were investigated by uniaxial compression at temperatures ranging from 300 degrees C to 450 degrees C and with an initial strain rate of 0.1 s(-1), and characterized by optical microscope (OM), scanning electron microscope (SEM) and electron back-scattering diffraction (EBSD). The effect of temperature on twinning behavior was focused in detail. At relatively low temperature, such as 300 degrees C, multiple twin variant pairs can be activated in one grain, and the twining process was dominated by nucleation. However, at high temperature, most of the twins activated in one grain belong to the single twin variant pair with the highest Schmid Factor (SF), and twin growth seems to represent the twinning behavior at 450 degrees C. The twinning behavior of Mg-6.58Gd-5.7Y-0.55Zr alloy at temperatures ranging from 300 degrees C to 450 degrees C basically follows Schmid law, and can be well understood in terms of variation of stress state and activated deformation modes with compression temperature.
引用
收藏
页码：173 / 181
页数：9
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