Computer Simulation of the Effect of Ultrasound and Annealing on the Structure of a Two-Dimensional Severely Deformed Nanocrystalline Material

被引：25

作者：

Nazarova, A. A. ^{[1
]}

Dmitriev, S. V. ^{[1
]}

Baimova, Yu. A. ^{[1
]}

Mulyukov, R. R. ^{[1
]}

Nazarov, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Bashkortostan, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2011年 / 111卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

ultrafine-grained materials; ultrasound; severe plastic deformation; computer simulation; molecular dynamics; MICROSTRUCTURAL EVOLUTION; DEFORMATION; CRYSTALS; TORSION; FIELD;

D O I：

10.1134/S0031918X11040090

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Qualitative comparison of the effect of ultrasonic treatment and annealing on the structural relaxation of a two-dimensional nanocrystalline material after severe plastic deformation has been performed by the molecular-dynamics method. The treatments of both types lead to a decrease in the dislocation density and to a more equilibrium state of grain boundaries and triple junctions but, unlike the temperature effect, ultrasonic treatment does not result in a considerable grain growth. Thus, the calculations conducted indicate potentialities of the ultrasonic treatment of bulk nanomaterials with the aim of relieving internal stresses without increasing grain size.

引用

页码：513 / 519

页数：7

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