Thermal stability of ultrafine-grained aluminum in the presence of Mg and Zr additions

被引：207

作者：

Hasegawa, H

Komura, S

Utsunomiya, A

Horita, Z

Furukawa, M

Nemoto, M

Langdon, TG ^{[1
]}

机构：

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

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

[3] Fukuoka Univ Educ, Dept Technol, Fukuoka 8114192, Japan

[4] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8128581, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 265卷 / 1-2期

关键词：

aluminum alloys; equal-channel angular pressing; grain growth; superplasticity; ultrafine grain size;

D O I：

10.1016/S0921-5093(98)01136-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Superplastic deformation occurs at high temperatures and requires the presence of a very small grain size. Experiments demonstrate that equal-channel angular (ECA) pressing is capable of introducing ultrafine grain sizes in pure Al, Al-Mg and Al-Zr alloys, with grain sizes lying in the sub-micrometer range for the alloys. It is shown by static annealing that these ultrafine grain sizes are not stable in pure Al and the A-Mg alloys at elevated temperatures but in the Al-Zr alloys the grains remain small up to temperatures of approximate to 600 K. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：188 / 196

页数：9

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