Hot Deformation Behavior and Microstructural Evolution of Twin-Roll-Casting Mg Alloy during High-Temperature Compression

被引：0
作者：
Yang, Qingshan [1 ,2 ]
Dai, Jiahong [3 ]
Chai, Sensen [1 ]
Yu, Daliang [1 ]
Jiang, Bin [2 ]
Pan, Fusheng [2 ]
机构：
[1] Chongqing Univ Sci & Technol, Sch Met & Mat Engn, Chongqing 401331, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloy, Chongqing 400044, Peoples R China
[3] Yangtze Normal Univ, Coll Mat Sci & Engn, Chongqing 408100, Peoples R China
来源：
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2019年 / 2019卷
基金：
中国国家自然科学基金;
关键词：
MECHANICAL-PROPERTIES; HIGH-STRENGTH; RECRYSTALLIZATION; GD;
D O I：
10.1155/2019/1820671
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The deformation behavior and microstructural evolution of twin-roll-casting AZ31 Mg alloy sheets were investigated via hot compression tests at 0 degrees, 5 degrees, and 10 degrees from the normal direction. Compression strains of 5%, 15%, 25%, and 35% were employed at high temperatures of 450 degrees C and 500 degrees C. The flow stress as well as the difference in the flow stress associated with different sampling directions decreased when the temperature was increased. Furthermore, the volume fraction of dynamically recrystallized grains increased with increasing deformation, whereas the average grain size decreased. The DRX grain size and the volume fraction of dynamically recrystallized grains increased with increasing deformation temperature. During ultrahigh temperature compression, the effect of sampling direction on the compression microstructure is relatively small.
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页数：7
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