Collinear superjogs and the low-stress response of fcc crystals

被引：42

作者：

Devincre, B.

Kubin, L.

Hoc, T.

机构：

[1] CNRS, ONERA, Lab Etude Microstruct, UMR 104, F-92322 Chatillon, France

[2] Ecole Cent Paris, Lab MSSMat, CNRS, UMR 8570, F-92295 Chatenay Malabry, France

来源：

SCRIPTA MATERIALIA | 2007年 / 57卷 / 10期

关键词：

plastic deformation; hardening; dislocation microstructure; dislocation dynamics; collinear superjogs;

D O I：

10.1016/j.scriptamat.2007.07.026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mutual interactions of dislocation lines containing collinear superjogs are investigated in face-centered cubic crystals by dislocation dynamics simulations in single slip and for various loading axes. The examination of the dislocation microstructures, dislocation densities and stress-strain curves allows the origin of work hardening during stage I to be clarified and explains the unusual hardening that is observed experimentally in [0 0 1] crystals at low stresses. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：905 / 908

页数：4

共 18 条

[1]

[Anonymous], PLASTIC DEFORMATION

[2]

Basinski S. J., 1979, Dislocations in solids, vol.IV. Dislocations in metallurgy, P261

[3] A dipole model for the cross-slip of screw dislocations in fcc metals [J].