Microstructure and Creep Resistance of Mg-(8-12 Wt.%) Zn-(2-6 Wt.%) Al Alloys

Xiao Feng Wan; Hong Jun Ni; Ming Yu Huang

doi:10.4028/www.scientific.net/AMR.591-593.1034

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Microstructure and Creep Resistance of Mg-(8-12 Wt.%) Zn-(2-6 Wt.%) Al Alloys
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Microstructure and Creep Resistance of Mg-(8-12 Wt.%) Zn-(2-6 Wt.%) Al Alloys

Abstract:

The aim of this paper is to investigate the microstructural characteristics and creep resistance of Mg-(8-12 Wt. %) Zn-(2-6 Wt. %) Al alloys in order to get a better overall understanding of these series alloys. The results indicate that the alloys studied with the ratio of Zn/Al concentration between 2 and 3 exhibit high creep resistances, and the alloy ZA124 with the continuous network of τ precipitate along grain boundaries shows the highest creep resistance. The creep resistance of alloys decreases significantly due to  eutectic phase,  eutectics and β compounds appearing, especially the creep properties of alloys containing  eutectic phase and β phase with lower Zn/Al concentration are obviously inferior to other alloys.