A MODEL FOR ANNEALING-INDUCED HARDENING IN ULTRAFINE-GRAINED METALS

被引：0

作者：

Sheinerman, A. G. ^{[1
]}

Krasnitckii, S. A. ^{[2
,3
]}

机构：

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

[2] Peter Great St Petersburg Polytech Univ, St Petersburg 195251, Russia

[3] ITMO Univ, Kronverkskiy Pr 49, St Petersburg 197101, Russia

来源：

MATERIALS PHYSICS AND MECHANICS | 2021年 / 47卷 / 04期

关键词：

ultrafine-grained materials; hardening; annealing; grain boundaries; PLASTIC-DEFORMATION; AL; DUCTILITY; BEHAVIOR; STRAIN;

D O I：

10.18149/MPM.4742021_8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We suggest a model, which describes the effect of grain boundary relaxation on the annealing-induced hardening in ultrafine-grained metals. Within the model, grain boundary relaxation during annealing is accompanied by a decrease in the number of grain boundary dislocation sources. The exhaustion of easily activated grain boundary dislocation sources results in the activation of harder grain boundary dislocation sources and/or repetitive action of the same dislocation sources. This gives rise to an increase in the strain hardening rate that can lead to an increase in the ultimate strength of ultrafine-grained solids. The results of the model agree with available experimental data.

引用

页码：608 / 612

页数：5

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