固溶处理对含长周期结构Mg97Zn1Y2合金显微组织及阻尼性能的影响  

Microstructure and Damping of Mg97Zn1Y2 Alloy with or without Solid Solution Treatment

作　　者：万迪庆[1] 利助民 周新建[1] 

机构地区：[1]华东交通大学,江西南昌330013

出　　处：《稀有金属材料与工程》2016年第5期1245-1248,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51361010)

摘　　要：通过光学显微镜、扫描电镜分析了铸态及固溶处理态Mg97Zn1Y2合金的显微组织,并利用EDS,XRD进行了物相分析。研究发现,固溶处理后,Mg97Zn1Y2合金中的长周期结构相（long period stacking ordered,LPSO）发生长大,由离散分布变为连续分布。阻尼测试结果显示,固溶处理后Mg97Zn1Y2合金阻尼性能下降。通过对铸态及固溶处理态Mg97Zn1Y2合金进行阻尼-温度谱分析,发现存在2个内耗峰：P1内耗峰位置在150-250℃附近,峰宽很宽,是由位错机制引起的内耗峰;P2内耗峰位置在350-500℃附近,初步认为是晶界内耗峰。The microstructure of as-cast Mg97Zn1Y2 alloy with or without solid solution treatment was observed by OM and SEM. Meanwhile, phases were analyzed by EDS and XRD. Results show that after solid solution treatment, LPSO（long period stacking ordered） phase grows up and turns into continuous distribution in Mg97Zn1Y2. Through damping testing, it is found that the damping capacity of Mg97Zn1Y2 alloy declines after solid solution treatment. The damping-temperature spectra of the as-cast Mg97Zn1Y2 and the solid solution treated alloy were also investigated. It is revealed that here are two internal friction peaks： damping peak P1 located between 150 ℃ and 250 ℃ and it is very wide, caused by the dislocation mechanism; while the damping peak P2 is near 350-500 ℃, which is preliminarily considered as grain boundary internal friction peak.

关 键 词：Mg97Zn1Y2合金 固溶处理 长周期结构 阻尼性能 内耗峰 

分 类 号：TG146.22[一般工业技术—材料科学与工程]