Special mechanism for dislocation nucleation in nanomaterials

被引：45

作者：

Gutkin, M. Yu. ^{[1
]}

Ovid'ko, I. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Problems Mech Engn, St Petersburg 199178, Russia

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 21期

关键词：

D O I：

10.1063/1.2206095

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A special mechanism of dislocation nucleation in deformed nanocrystalline materials (NCMs) is suggested and theoretically described. The mechanism represents nonlocal homogeneous nucleation of a nanoscale loop of "noncrystallographic" partial dislocation whose Burgers vector magnitude continuously grows during the nucleation process. It is shown that the special mechanism can effectively produce nanoscale loops of lattice and grain boundary dislocations in NCMs deformed at high mechanical stresses. (c) 2006 American Institute of Physics.

引用

页数：3

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