Strain rate sensitivity studies in an ultrafine-grained Al-30 wt.% Zn alloy using micro- and nanoindentation

被引：94

作者：

Chinh, Nguyen Q. ^{[1
]}

Csanadi, Tamas ^{[1
]}

Gyori, Tivadar ^{[1
]}

Valiev, Ruslan Z. ^{[2
]}

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

Kawasaki, Megumi ^{[5
,6
,7
]}

Langdon, Terence G. ^{[5
,6
,8
]}

机构：

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

[2] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia

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

[4] KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

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

[6] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA

[7] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

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

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 543卷

基金：

欧洲研究理事会; 俄罗斯基础研究基金会; 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; Micro and nanoindentation; SEVERE PLASTIC-DEFORMATION; HIGH-PRESSURE TORSION; HIGH-TENSILE DUCTILITY; AL-ZN; METALS; EVOLUTION; ALUMINUM; REFINEMENT; STRENGTH; COPPER;

D O I：

10.1016/j.msea.2012.02.056

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The characteristics of plastic deformation of an ultrafine-grained (UFG) Al-30 wt.% Zn alloy were investigated using depth-sensing micro- and nanoindentation. Emphasis was placed on the effects of grain boundaries and the unusually high strain rate sensitivity. It is shown that there is a close relationship between enhanced strain rate sensitivity and ductility in this UFG material and this is associated with grain boundary sliding and enhanced diffusion along the Al/Al grain boundaries which appear to be wetted by Zn-rich layers. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：117 / 120

页数：4

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