文献类型：期刊文献

英文题名：Dependence of Microstructure and Hardening Behavior on Torsion Strain and Strain Rate in Extruded AZ31 Rods

作者：Chen, Hongbing Liu, Tianmo Yu, Hongni Song, Bo Hou, Dewen Guo, Ning He, Jiejun

第一作者：Chen, Hongbing

通信作者：Liu, TM[1];Song, B[2]

机构：[1]Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China;[2]Southwest Univ, Fac Mat & Energy, Chongqing 400716, Peoples R China;[3]Southwest Univ, Coll Engn & Technol, Chongqing 400716, Peoples R China;[4]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

通信机构：corresponding author), Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China;corresponding author), Southwest Univ, Fac Mat & Energy, Chongqing 400716, Peoples R China.

年份：2016

卷号：18

期号：9

起止页码：1683-1689

外文期刊名：ADVANCED ENGINEERING MATERIALS

收录：;EI(收录号：20162902618995);Scopus(收录号：2-s2.0-84978908821);WOS:【SCI-EXPANDED(收录号:WOS:000382986100020)】；

基金：The current study was financially supported by the National Natural Science Foundation of China (Grant Nos. 11332013, 51405396, and 51405396), the China and Chongqing Postdoctoral Science Foundation Funded Project (2015M572429 and XM2015058), and Natural Science Foundation of Guizhou Province (Grant No. [2015] 2067).

语种：英文

外文关键词：Deformation - Hardening - Hardness - Magnesium alloys - Microstructure - Torsional stress

摘要：In this study, the effects of torsion strain and strain rate on microstructure and hardening behavior of extruded AZ31 Mg alloy rods are investigated. Torsion deformation can generate abundant extension twins and dislocations and cause the rotation of c-axis toward extrusion direction. These microstructures exhibit gradient distributions along the radial direction of torsion-deformed rods. Torsion deformation can effectively enhance the hardness of AZ31 rods. The gradient microstructure leads to a gradient hardness distribution in torsion-deformed rods. High strain rates can enhance the hardening effect via torsion deformation by promoting increment of dislocation density.