Superplasticity in an ultrafine-grained Al-Mg-Sc alloy produced by equal-channel angular pressing

被引：0

作者：

Komura, S ^{[1
]}

Berbon, PB ^{[1
]}

Utsunomiya, A ^{[1
]}

Furukawa, M ^{[1
]}

Horita, Z ^{[1
]}

Nemoto, M ^{[1
]}

Langdon, TG ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 81281, Japan

来源：

HOT DEFORMATION OF ALUMINUM ALLOYS II | 1999年

关键词：

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An Al-3% Mg-0.2% Sc alloy was subjected to equal-channel angular (ECA) pressing to produce a grain size of similar to 0.2 mu m. Static annealing experiments showed that it was possible to retain a very small grain size at temperatures up to 673 K for an annealing time of 1 hour. Large tensile ductilities were observed after ECA pressing, including elongations of >600% and >1000% when testing with an initial strain rate of 3.3 x 10(-2) s(-1) at temperatures of 573 and 673 K, respectively, The results demonstrate the potential for using a scandium addition in Al-based alloys in order to retain an ultrafine grain size at elevated temperatures and thereby to achieve superplastic ductilities.

引用

页码：125 / 138

页数：14

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