Effect of Warm Deforming and Heat Treating on Microstructure and Mechanical Properties of Mg-Zn-Zr Magnesium Alloy

Abstract:

In this paper, the effects of hot extrusion and T5、T6 heat treatment on the microstructures and mechanical properties of ZK60 magnesium alloys are investigated by optical microscope, electronic scanning microscope and mechanical testers. The result shows that both the tensile strength and the elongation of the ZK60 alloy extruded at 380°Care much higher than that of the as-cast alloys, as there are much granular second phases precipitated during the extrusion. The tensile strength of the extruded and T5 treated alloy increases while the elongation decreases faster than that of the extruded alloy. The strengthening effect of the T6 treatment is inferior to that of the T5 treatment. The tensile fracture of the as-cast alloy is brittle fractured while that of the extruded and T5 treated alloy is ductile fractured with lots of deep and even dimples.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 707-711
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.707
• Online since: February 2012
• Authors: Guan Lu, Ya Qin Yang, Bao Cheng Li, Zhi Min Zhang
• Keywords: Extrusion, Mechanical Property, Microstructure, T5 Heat Treatment, T6-Heat Treatment, ZK60 Magnesium Alloy

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