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Superplastic deformation characteristics and constitution equation in rapidly solidified Mg–Al–Ga alloy

Published online by Cambridge University Press:  31 January 2011

A. Uoya ,
T. Shibata ,
K. Higashi ,
A. Inoue  and
T. Masumoto
A. Uoya
Affiliation:
Sendai Institute of Materials Science and Technology, YKK Corporation, Tomiya Miyagi 981–33, Japan
T. Shibata
Affiliation:
Sendai Institute of Materials Science and Technology, YKK Corporation, Tomiya Miyagi 981–33, Japan
K. Higashi
Affiliation:
Department of Mechanical System Engineering, College of Engineering, University of Osaka Prefecture, Sakai, Osaka 593, Japan
A. Inoue
Affiliation:
Institute of Materials Research, Tohoku University, Sendai Miyagi 980, Japan
T. Masumoto
Affiliation:
Institute of Materials Research, Tohoku University, Sendai Miyagi 980, Japan
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Abstract

The hot deformation characteristics of a newly typed, high strength magnesium-based alloy, Mg–8.3 wt.% Al–8.1 wt.% Ga alloy, produced by rapidly solidified and powder metallurgy method have been investigated. Tensile tests were carried out at a temperature range from 523 to 623 K and a strain rate range from 10−4 to 1 s−1. Superplastic characteristics were found and, especially, a maximum elongation-to-failure of 1080% was obtained at 573 K and at a relatively high strain rate of 10−2 s−1. Because of the presence of fine microstructures at high temperatures, the optimum superplastic strain rate of the Mg–Al–Ga alloy was higher than that of the reported conventional superplastic aluminum and magnesium alloys.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 11 , November 1996 , pp. 2731 - 2737
Copyright
Copyright © Materials Research Society 1996

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