Compressive deformation behavior of an indirect-extruded Mg-8Sn-1Al-1Zn alloy

被引：11
作者：
Cheng, Wei-li [1 ,2 ]
Que, Zhong-ping [1 ]
Zhang, Jin-shan [1 ]
Xu, Chun-xiang [1 ]
Liang, Wei [1 ]
You, Bong Sun [2 ]
Park, Sung Soo [3 ]
机构：
[1] Taiyuan Univ Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Korea Inst Mat Sci, Chang Won 641831, South Korea
[3] Ulsan Natl Inst Sci & Technol, Ulsan 689798, South Korea
来源：
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2013年 / 20卷 / 01期
关键词：
magnesium alloys; compression testing; dynamic recrystallization; microstructure; HIGH-TEMPERATURE DEFORMATION; MG-SN ALLOYS; HOT-WORKING; DYNAMIC RECRYSTALLIZATION; MG-3SN-1CA ALLOY; MAGNESIUM ALLOY; CREEP-BEHAVIOR; ZR ALLOY; AS-CAST; MICROSTRUCTURE;
D O I：
10.1007/s12613-013-0692-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The medium and warm deformation behaviors of an indirect-extruded Mg-8Sn-1Al-1Zn alloy were investigated by compression tests at temperatures between 298 and 523 K and strain rates of 0.001-10 s(-1). It was found that the twinning-slip transition temperature was strain rate dependent, and all the true stress-true strain curves could be divided into two groups: concave and convex curves. Associated microstructural investigations indicated that the dynamic recrystallization (DRX) behavior of the alloy varied with deformation conditions. At high strain rate and low temperature, dynamically recrystallized grains preferentially nucleated and developed in the twinned regions, indicating that twinning-induced DRX was dominant. While, at low strain rate, DRX developed extensively at grain boundaries and twins, and the process of twinning contributed to both oriented nucleation and selective growth. For the studied alloy, cracks mainly initiated from the shear band and twinning lamellar over the ranges of temperature and strain rate currently applied.
引用
收藏
页码：49 / 56
页数：8
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