The effect of impurity level on ultrafine-grained microstructures and their stability in low stacking fault energy silver

被引：24

作者：

Hegedus, Zoltan ^{[1
]}

Gubicza, Jeno ^{[1
]}

Kawasaki, Megumi ^{[2
,3
]}

Chinh, Nguyen Q. ^{[1
]}

Fogarassy, Zsolt ^{[4
]}

Langdon, Terence G. ^{[2
,3
,5
]}

机构：

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

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

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

[4] Res Inst Tech Phys & Mat Sci, H-1525 Budapest, Hungary

[5] 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 | 2011年 / 528卷 / 29-30期

基金：

匈牙利科学研究基金会; 美国国家科学基金会; 欧洲研究理事会;

关键词：

Severe plastic deformation; Equal-channel angular pressing; Silver; Stacking fault energy; Thermal stability; SEVERE PLASTIC-DEFORMATION; ECAE-PROCESSED COPPER; HIGH-PRESSURE TORSION; HIGH-PURITY ALUMINUM; METALS; CU; RECRYSTALLIZATION; TEMPERATURE; EVOLUTION; TEXTURE;

D O I：

10.1016/j.msea.2011.08.034

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of impurity content on the evolution of microstructure in low stacking fault energy silver processed by severe plastic deformation (SPD) was studied. The SPD-processing was carried out on 4N5 and 4N purity Ag samples by equal-channel angular pressing (ECAP) up to 16 passes. It was found that, although the minimum grain size and the maximum dislocation density were not affected by the different impurity atom content, there is a lower degree of twinning in the less pure material for high number of passes. The small increase of impurity level from 4N5 to 4N in Ag resulted in a significantly better thermal stability at room temperature for the ultrafine-grained microstructures obtained by ECAP. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：8694 / 8699

页数：6

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