Modelling of microstructure development by means of a dislocation-disclination reaction kinetics

被引：2
|
作者：
Seefeldt, M [1 ]
Klimanek, P [1 ]
机构：
[1] Freiberg Univ Min & Technol, Inst Phys Met, D-09596 Freiberg, Germany
来源：
COMPUTATIONAL MATERIALS SCIENCE | 1997年 / 9卷 / 1-2期
关键词：
disclinations; reaction kinetics; microstructure development; subgrain strengthening; Poisson-Voronoi mosaic;
D O I：
10.1016/S0927-0256(97)00082-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure development under plastic deformation up to large strains is modelled by means of a four-component reaction kinetics for the densities of mobile and immobile dislocations and disclinations. The resulting system of nonlinear differential equations is able to describe the transition from a dislocation-dominated to a disclination-controlled kinetics finally running into an instability. A relationship between the density of sessile disclinations and the flow stress is proposed using a Hall-Petch type relation for subgrain-size strengthening. (C) 1997 Published by Elsevier Science B.V.
引用
收藏
页码：267 / 273
页数：7
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