The Preparation of Rapidly Solidified and Powder Metallurgy AZ91 Alloy

Abstract:

AZ91 alloy powder was prepared by two-roller quenching equipment. The powders were consolidated and extruded into bar. The microstructures of the powders and bars were observed by optical microscope (OM), XRD, HRTEM and SEM. The results suggested that the grain size of the powder were equiaxed with the sizes of about 1~5μm. The as-extruded alloy bars retain equiaxed grains with a large number of precipitated phases, β-Al12Mg17 and AlMg2Zn. The alloy exhibited excellent mechanical properties, the ultimate and yield tensile strength were 383.2MPa and 275.1MPa respectively. The shape of the precipitated phase was approximately globular with the size of about 50~200nm.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 29-33
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.29
• Online since: February 2012
• Authors: Shao Ding Sheng, Hong Ge Yan
• Keywords: Magnesium Alloy, Mechanical Property, Powder metallurgy, Rapidly Solidified

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