Influence of rolling on the superplastic behavior of an Al-Mg-Sc alloy after ECAP

被引：118

作者：

Akamatsu, H ^{[1
]}

Fujinami, T

Horita, Z

Langdon, TG

机构：

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

[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

来源：

SCRIPTA MATERIALIA | 2001年 / 44卷 / 05期

基金：

日本学术振兴会;

关键词：

aluminum alloy; equal-channel angular pressing; microstructure; rolling; superplasticity;

D O I：

10.1016/S1359-6462(00)00666-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Equal-channel angular pressing (ECAP) produces an ultrafine grain size and superplastic ductilities at very rapid strain rates in an Al-Mg-Sc alloy. Essentially identical high superplastic elongations are also observed after ECAP plus cold rolling (CR) to form a sheet metal. The elongations remain unchanged because, although the grains become elongated within a banded microstructure in CR and dislocations are introduced within the grains, the boundaries of the ultrafine grains retain their high angles of misorientation. The results confirm that cold rolling after ECAP is an effective procedure for the production of a superplastic sheet metal.

引用

页码：759 / 764

页数：6

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