Twins formation and their role in nanostructuring of zirconium
Twins formation and their role in nanostructuring of zirconium
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DOI：
10.1016/j.msea.2009.05.057
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发表时间：
2009-10
期刊：
影响因子：
6.4
通讯作者：
Lan Zhang;Yong Han
中科院分区：
文献类型：
--
作者：
Lan Zhang;Yong Han
研究了表面机械研磨处理中孪晶的形成及其在锆纳米结构化中的作用。孪晶通过晶界部分位错的连续发射或晶粒内部堆垛层错和部分位错的重叠而成核。随着应变的增加，孪核通过在孪晶界两侧增加更多的部分位错对而长大。孪晶与位错的相互作用使晶粒细化，从而实现锆的纳米晶化。
Twins formation and their role in nanostructuring of zirconium by surface mechanical attrition treatment were investigated. Twins nucleate via successive emission of partial dislocations from grain boundaries or overlapping of stacking faults and partial dislocations in grain interiors. As strain increases, twin nuclei grow up by adding more partial dislocations pairs into either side of the twin boundaries. The interaction between the formed twins and dislocations refines coarse grains into smaller ones, resulting in nanocrystallization of zirconium.