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New role of screw dislocation in twin lamella during deformation: An in situ TEM study at the atomic scale
Materials Science and Engineering: A ( IF 6.4 ) Pub Date : 2018-05-17 , DOI: 10.1016/j.msea.2018.05.053
Zongde Kou , Yanqing Yang , Lixia Yang , Bin Huang , Yanxia Chen , Xian Luo

Two dynamic processes were revealed in Cu by in situ tensile tests at the atomic scale: a lattice screw dislocation forming by the combination of two twinning dislocations; and two 60° full dislocations evolving from an extended screw dislocation. The results indicate that screw dislocation can trigger the transition of dislocation slip mode by its formation and dissociation, and also nucleate non-screw dislocations.



中文翻译:

螺旋位错在孪晶层变形过程中的新作用:原子尺度的原位TEM研究

通过原子尺度的原位拉伸测试,发现了铜中的两个动力学过程:晶格螺钉位错是由两个孪生位错的组合形成的;晶格位错是由两个孪生位错的组合形成的。和两个60°的全位错,这些位错是由扩展的螺丝位错演变而来的。结果表明,螺钉位错可以通过其形成和解离触发位错滑移模式的转变,并且还可以成核非螺钉位错。

更新日期:2018-05-17
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