The Effect of Grain Boundary Sliding and Strain Rate Sensitivity on the Ductility of Ultrafine-Grained Materials

被引：34

作者：

Chinh, Nguyen Q. ^{[1
]}

Csanadi, Tamas

Gubicza, Jeno

Valiev, Ruslan Z. ^{[2
]}

Straumal, Boris B. ^{[3
,4
]}

Langdon, Terence G. ^{[5
,6
]}

机构：

[1] Eotvos Lorand Univ, Dept Mat Phys, H-1117 Budapest, Hungary

[2] Ufa State Aviat Technol Univ, Inst Phys, Ufa 450000, Russia

[3] Russian Acad Sci, Inst Solid State Phys, Moscow 142432, Russia

[4] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

[5] Univ Southern Calif, Dept Aerosp & Mech Engn & Mat Sci, Los Angeles, CA 90089 USA

[6] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England

来源：

NANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2 | 2011年 / 667-669卷

基金：

美国国家科学基金会; 匈牙利科学研究基金会;

关键词：

Ultrafine-grained materials; grain boundary sliding; wetted boundaries; strain rate sensitivity; ductility; EVOLUTION; METALS;

D O I：

10.4028/www.scientific.net/MSF.667-669.677

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Most ultrafine-grained (UFG) materials produced by severe plastic deformation (SPD) exibit only limited ductility which is correlated with the low strain rate sensitivity (SRS) of these materials. Recently, it was demonstrated that SPD is capable of increasing the room temperature ductility of aluminum-based alloys attaining elongations up to 150%, together with relatively high strain rate sensitivity. In the present work, additional results and discussions are presented on the effect of grain boundary sliding (GBS) and SRS on the ductility of some UFG metals and alloys. The characteristics of constitutive equations describing the steady-state deformation process are quantitatively analyzed for a better understanding of the effects of grain boundaries and strain rate sensitivity.

引用

页码：677 / +

页数：2

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