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通过光学显微镜、扫描电镜分析了铸态及固溶处理态Mg93Zn6Y1合金的显微组织,并利用EDS、XRD进行了物相分析。结果表明,铸态Mg93Zn6Y1合金的显微组织主要由α-Mg相和准晶相(Mg3Zn6Y1)组成。此外,差热分析(DTA)用来分析其相变,得到Mg93Zn6Y1合金合适的固溶温度为430℃。研究发现固溶处理后,Mg93Zn6Y1合金中准晶相发生熔断,由铸态下的连续网状结构变为颗粒状。通过阻尼性能测试以及腐蚀速率测试,发现固溶处理可以较好地改善Mg93Zn6Y1合金的阻尼性能以及耐蚀性能。
The microstructure of as-cast and solution-treated Mg93Zn6Y1 alloy was analyzed by optical microscope and scanning electron microscope, and the phase analysis was carried out by EDS and XRD. The results show that the microstructure of as-cast Mg93Zn6Y1 alloy mainly consists of α-Mg phase and quasicrystalline phase (Mg3Zn6Y1). In addition, differential thermal analysis (DTA) was used to analyze the phase transition, resulting in a suitable solution temperature of Mg93Zn6Y1 alloy of 430 ℃. It is found that after the solution treatment, the quasicrystalline phase in the Mg93Zn6Y1 alloy melts and changes from continuous network structure under the as-cast state to granular form. Through the damping performance test and corrosion rate test, it is found that the solution treatment can improve the damping performance and corrosion resistance of Mg93Zn6Y1 alloy.