Study on Aging Strengthening of Mg-Zn-Cu Alloy Based on Component Optimization Design

Abstract:

In this study, we investigated the aging strengthening of Mg-Zn-Cu alloy based on component optimization design by FactSage software, optical microscope (OM), X-ray diffraction (XRD) and Vickers hardness tester. The results show that the precipitation rate of MgZn₂ phase in Mg-6Zn-1Cu is significantly higher than that of the other alloys. When Mg-6Zn-1Cu alloy is subjected to aging at 160°C for different time, the phase consists of α-Mg, MgCu₂ and MgZn₂. The content of main strengthening phase MgZn₂ is increasing with the prolonging of aging time. When Mg-6Zn-1Cu alloy aged at 160°C for 10h, the kinetics of precipitation is considerably accelerated. The results indicate that the hardening produced in the Cu-containing alloy is considerably higher than in the Mg-Zn alloy. Therefore, based on component optimization design to establish Mg-Zn-Cu alloy solidification database, and to predict the phase equilibrium and thermodynamic properties of the alloy, is an effective method for the development of new magnesium alloy.

• Periodical: Materials Science Forum (Volume 873)
• Pages: 33-37
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.873.33
• Online since: September 2016
• Authors: Jie Ye, Xiao Ping Lin*, Yun Dong, Bo Li, Gao Peng Xu, Fei Teng, Gui Fang Sun, Jie Han
• Keywords: Aging Strengthening, Component Optimization, MgZn₂ Phase, Mg-Zn-Cu Alloy

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