Twining and Slip Activity in Magnesium Single Crystal
Twining and Slip Activity in Magnesium Single Crystal
复制标题
镁单晶中的缠绕和滑移活动
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
E. Lilleodden
中科院分区：
文献类型：
--
作者：
Gyuseok Kim;S. Yi;Yuanding Huang;E. Lilleodden
对单晶Mg进行了不利于基底滑移方向的单轴μ压缩试验。结果表明，变形的早期阶段是通过孪晶和位错塑性进行的。孪晶导致有利于基底滑移的晶体重新定向，通常与压缩方向对齐。当达到临界应变时，会发生大的应变爆裂，这与孪晶的快速扩展和孪晶内部基底滑移的激活有关。通过对变形结构的SEM、EBSD和TEM表征，揭示了变形行为的机理。
Uniaxial μ-compression tests have been performed on single crystal Mg with a compression direction, an orientation unfavorable for basal slip. Results show that the early stages of deformation proceed via both twinning and dislocation plasticity. Twinning leads to a reorientation of the crystal favorable for basal slip, typically with the aligned with the compression direction. At a critical strain a large strain burst occurs, and is associated with both rapid propagation of the twin and the activation of basal slip within the twin. Such a mechanistic picture of the deformation behavior is revealed through SEM, EBSD and TEM characterization of the deformation structures.