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01-06-2008 | Issue 6/2008

Metallurgical and Materials Transactions A 6/2008

Effects of Temperature and Strain Rate on the High-Temperature Workability of Strip-Cast Mg-3Al-1Zn Alloy

Journal:
Metallurgical and Materials Transactions A > Issue 6/2008
Authors:
B.H. Lee, W. Bang, S. Ahn, C.S. Lee
Important notes
Manuscript submitted October 17, 2007.

Abstract

In this study, high-temperature workability of a strip-cast Mg-3Al-1Zn (AZ31) alloy was investigated on the basis of the processing map and microstructural analysis. To obtain the processing map, a series of isothermal compression tests was carried out up to a strain of 0.5 at temperatures of 473 to 673 K and strain rates of 0.01 to 10 s−1. It was found that the maximum efficiency indicating the optimum processing condition was obtained at 573 K and 10 s−1, and the processing instability occurred around the region of 473 K and 0.01 s−1. The possible high-temperature deformation mechanisms were also discussed in relation to initial texture development and twin formation.

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