Dislocations emitted from nanocrystalline grain boundaries: nucleation and splitting distance
Dislocations emitted from nanocrystalline grain boundaries: nucleation and splitting distance
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DOI：
10.1016/j.actamat.2004.09.001
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发表时间：
2004-12-01
期刊：
影响因子：
9.4
通讯作者：
Van Swygenhoven, H
中科院分区：
文献类型：
--
作者：
Froseth, AG;Derlet, PM;Van Swygenhoven, H
本文用部分位错的分裂距离讨论了面心立方金属纳米晶中从晶界分离的全位错的形核和扩展。它表明，使用的分裂距离假设存在的部分位错，因此不能解释成核标准。此外，即使两个部分位错都成核，局部应力分布似乎在部分位错的分离中起着重要作用。(C)2004 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The nucleation and propagation of dissociated full dislocations from grain boundaries in nanocrystalline fcc metals is discussed in terms of the splitting distance between two partial dislocations. It is demonstrated that the use of the splitting distance assumes the existence of the partial dislocations and therefore can not account for nucleation criteria. Moreover, even once both partial dislocations are nucleated, the local stress distribution seems to play an important role in the separation of the partials. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.