| Twinning during hot compression of ZK30 ＋ 0.3Yb magnesium alloy |
| |
| 引用本文： | 叶呈武,刘志义,张坤,郑青春.Twinning during hot compression of ZK30 ＋ 0.3Yb magnesium alloy[J].中国有色金属学会会刊,2005,15(4):884-888. |
| |
| 作者姓名： | 叶呈武 刘志义 张坤 郑青春 |
| |
| 作者单位： | School of Materials Science and Engineering, Central South University, Changsha 410083, China |
| |
| 摘 要： | The twinning process of ZK30＋0.3Yb magnesium alloy was studied. The results show that twinning occurs at the initial stage of deformation, and decreases during further deformation. The original grain is fragmented after small straining. It is investigated that the twinning boundary activates the occurrence of the non-basal slip system due to the stress concentration at the vicinity of twin boundary introduced by the dislocation pile-ups at the vicinity of twinning boundary. The rearrangement of dislocation after dislocation climb introduces new grain boundary. Simultaneously, twinning occurs to form “polygonization” due to the stress concentration relaxation, and the “polygonization” will transform into low angle boundary to refine the original grain under the shear stress with further straining.
|
| 关 键 词： | 镁合金 热压缩 变形 表面活性介质 弹性 |
| 文章编号： | 1003-6326（2005）04-0884-05 |
| 收稿时间： | 2004-09-12 |
| 修稿时间： | 2005-01-25 |
Twinning during hot compression of ZK30 + 0.3Yb magnesium alloy |
| |
| YE Cheng-wu,LIU Zhi-yi,ZHANG Kun,ZHENG Qing-chun.Twinning during hot compression of ZK30 + 0.3Yb magnesium alloy[J].Transactions of Nonferrous Metals Society of China,2005,15(4):884-888. |
| |
| Authors: | YE Cheng-wu LIU Zhi-yi ZHANG Kun ZHENG Qing-chun |
| |
| Abstract: | The twinning process of ZK30 0.3Yb magnesium alloy was studied. The results show that twinning occurs at the initial stage of deformation, and decreases during further deformation. The original grain is fragmented after small straining. It is investigated that the twinning boundary activates the occurrence of the non-basal slip system due to the stress concentration at the vicinity of twin boundary introduced by the dislocation pile-ups at the vicinity of twinning boundary. The rearrangement of dislocation after dislocation climb introduces new grain boundary.Simultaneously, twinning occurs to form "polygonization" due to the stress concentration relaxation, and the "polygonization" will transform into low angle boundary to refine the original grain under the shear stress with further straining. |
| |
| Keywords: | magnesium alloys twinning dislocation rearrangement grain refinement |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
