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Journal of Alloys and Compounds

 

发表期刊名称

Journal of Alloys and Compounds

简介

The effects of solid solution and aging treatments on the microstructure evolution and mechanical property of the as-cast Mg–14Gd–3Y–1.8Zn–0.5Zr alloy are investigated in this study. The microstructures of the 14H type long period stacking ordered (LPSO) structure and RE precipitates in the conditioned alloys are observed and analyzed by XRD, SEM and TEM. The mechanical properties of the alloys are evaluated Vickers hardness and ambient-temperature tensile tests. The results show that the volume fraction of 14H-LPSO structure in the alloy increased gradually with continued solution. The maximum volume fraction of RE precipitates is obtained when the alloy is solid-solution-treated at 793 K for 10 h and subsequently aged at 498 K for 16 h, under this optimum condition the mechanical properties (ultimate tensile strength: 366 MPa, yield strength: 230 MPa, elongation: 2.8%) at ambient temperature are achieved. The good performance of the studied GWZK alloy results from the dense precipitation of 14H-LPSO structure and RE precipitates in the matrix during the solid solution and aging process.

图片

发表时间

2013.04

影响因子

2.999

完成人

Song Zhang, Wencai Liu, Xiyao Gu, Chen Lu, Guangyin Yuan, Wenjiang Ding

联系人

刘文才

电话

 

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