DISLOCATION DENSITY EVOLUTION EQUATION AND STRAIN-HARDENING OF FCC CRYSTALS

被引：63
作者：
MALYGIN, GA
机构：
[1] A. F. Ioffe Physico-Technical Institute, Academy of Sciences of the Ussr
来源：
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1990年 / 119卷 / 02期
关键词：
D O I：
10.1002/pssa.2211190204
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using the equation of the dislocation density evolution which includes the process of dislocation multiplication at obstacles of dislocation and nondislocation origin and the process of dislocation annihilation, the strain hardening curves of some f.c.c. and b.c.c. metallic crystals and polycrystals are analysed. A method of experimental and theoretical treatment of the curves is proposed allowing to obtain information concerning the influence of crystal microstructure on the coefficients of the evolution equation. Particular attention is given to receive quantitative data of the process of dislocation annihilation at temperatures lower than 0.4Tm, Tm is the melting temperature. It is found that the annihilation coefficient of dislocations in f.c.c. metals changes approximately linearly with temperature in this temperature region. Copyright © 1990 WILEY‐VCH Verlag GmbH & Co. KGaA
引用
收藏
页码：423 / 436
页数：14
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