钪元素对Al-20Zn合金拉伸性能及阻尼性能的影响  

Effect of Sc on Tensile Properties and Damping Capacity of Al-20Zn Alloy

作　　者：陈勇 侯远飞 徐峥峥 彭英浩 刘崇宇(指导)[2] 钟皓 CHEN Yong;HOU Yuanfei;XU Zhengzheng;PENG Yinghao;LIU Chongyu;ZHONG Hao(Guangdong Hongjin New Material Technology Co.,Ltd.,Dongguan 523808,China;College of Material Science and Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]广东宏锦新材料科技有限公司,东莞523808 [2]桂林理工大学材料科学与工程学院,桂林541004

出　　处：《机械工程材料》2020年第7期88-91,97,共5页Materials For Mechanical Engineering

基　　金：广西科技重大专项资助项目(桂科AA17202007)。

摘　　要：通过熔铸工艺制备Al-20Zn和Al-20Zn-0.5Sc合金,对比研究了铸态、均匀化处理态、轧制态合金的显微组织以及轧制态合金的拉伸性能及阻尼性能。结果表明:Al-20Zn-0.5Sc合金的晶粒尺寸均小于相同状态下Al-20Zn合金的;轧制态Al-20Zn-0.5Sc合金比Al-20Zn合金具有更高的屈服强度、抗拉强度、断后伸长率及高温(360℃)内耗;钪元素与铝结合形成的Al3Sc纳米相可以钉扎晶界和位错,抑制再结晶,细化晶粒,使Al-20Zn-0.5Sc合金表现出更优异的拉伸性能及高温阻尼性能。Al-20 Zn and Al-20 Zn--.5 Sc alloys were prepared by melt-casting technique.The microstructure of the as-cast,homogenized,rolled alloys and the tensile properties and damping properties of the rolled alloys were studied and compared.The results show that the grainsizeofAl-20 Zn-0.5 Scalloy was smaller than that of Al-20 Zn alloyinthesamestate.TherolledAl-20 Zn-0.5 Scalloy showed higher yield strength,tensile strength,elongation after fracture and high temperature(360℃)internal friction than the Al-20 Zn alloy.The Al3 Sc nanophase formed by the reaction of scandium and aluminum could pin grain boundaries and dislocations,inhibit recrystallization,and refine grains,sotheAl-20 Zn-0.5 Scalloy exhibited more excellent tensile properties and high-temperature damping capacity.

关 键 词：铝合金 钪 阻尼 拉伸性能 Al3Sc纳米相 

分 类 号：TB303[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]