Generation of dislocation loops in deformed nanocrystalline materials

被引：12

作者：

Gutkin, MY ^{[1
]}

Ovid'ko, IA ^{[1
]}

机构：

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

来源：

PHILOSOPHICAL MAGAZINE | 2006年 / 86卷 / 11期

关键词：

D O I：

10.1080/14786430500199302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A theoretical model is suggested which describes the generation of lattice perfect, lattice partial and grain boundary dislocation loops (DLs) at pre-existent DLs in mechanically loaded nanocrystalline materials (NCMs). The energy characteristics of various modes of the DL generation are calculated and compared. With these calculations and comparison, the two basic ranges of the grain size in NCMs are revealed each is characterized by its specific set of effectively operating modes of the DL generation and plastic deformation. The role of the DL generation in plastic and superplastic deformation processes in NCMs is discussed.

引用

页码：1483 / 1511

页数：29

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