期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 25, 期 12, 页码 3928-3935出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(15)64040-7
关键词
magnesium alloy; microstructure; torsion; asymmetry; texture; twinning
资金
- National Natural Science Foundation of China [51474241]
- National Basic Research Program of China [2013CB632204]
The ductility and plastic asymmetry of an as-annealed magnesium alloy plate were studied in compression through combined process of torsion and subsequent annealing by optical microscope and EBSD. The yield strength (YS) and ultimate compression strength (UCS) as well as the compression ductility (CD) were simultaneously raised by prior torsion at room temperature. The CD was further enhanced by subsequent annealing. Also, the torqued sample followed by annealing experienced a rising CD with the increase in prior strain, leading to the maximum true strain of 0.279, which is twice that of the as-annealed original one. The sample showed a largely reduced tension-compression yield asymmetry by subjecting to pre-torsion alone or combined with a subsequent annealing. The enhanced ductility and reduced asymmetry are attributed to the development of a gradient microstructure with refined grains, and also randomization of the weakened texture due to torsion and subsequent annealing.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据