搅拌摩擦加工对ZL108合金结构及阻尼性能的影响  

Effects of Friction Stir Processing on Microstructure and Damping Capacity of the ZL108 Aluminum Alloy

作　　者：杨振兴[1,2] 江鸿杰 刘崇宇[1] 秦芳诚[1] 黄宏峰 Yang Zhenxing;Jiang Hongjie;Liu Chongyu;Qing Fangcheng;Huang Hongfeng(Key Laboratory of New Processing Technology for Nonferrous Metal ＆ Materials,Ministry of Education,Guilin University of Technology;Alnan Aluminium Co.,Ltd.)

机构地区：[1]桂林理工大学广西有色金属及特色材料加工教育部重点实验室 [2]广西南南铝加工有限公司

出　　处：《特种铸造及有色合金》2018年第11期1257-1261,共5页Special Casting & Nonferrous Alloys

基　　金：广西科技重大专项资助项目(桂科AA17202007);广西中青年教师基础能力提升计划资助项目(2018KY0254);桂林理工大学博士科研启动基金资助项目(GUTQDJJ2014016)

摘　　要：采用搅拌摩擦加工(FSP)技术制备出具有细晶结构的ZL108铝合金,并对其微观组织、力学和阻尼性能进行研究。结果发现,ZL108铝合金FSP后,基体中粗大的Si相得到显著细化和均匀化,合金的抗拉强度和伸长率均随着FSP旋转速度的增加而增大。研究还发现,ZL108铝合金内耗值随着温度的升高而增大,当温度高于200℃时,FSP试样中存在大量细小晶界和相界的滑移运动,将外界施加的振动能转化为内能,有利于改善合金的高温阻尼性能,使得FSP试样的阻尼性能明显高于母材,其中FSP旋转速度为300r/min的试样阻尼性能最高;ZL108铝合金的存储模量随着温度的升高而降低,而FSP试样的存储模量高于母材的。The ZL108 aluminum alloy with fine grain structure was prepared by friction stir processing（FSP）technology,and its microstructure,mechanical properties and damping capacity were investigated.The results reveal that after the FSPed,the coarse Si phase in the ZL108 aluminum alloy is significantly refined with more uniform distribution,and tensile strength and elongation of the ZL108 aluminum alloy are increased with the increase of the FSP rotation speed.In addition,the internal friction value of ZL108 aluminum alloy is increased with the increase of temperature.When the temperature is higher than 200℃,there exists a lot of fine grain boundary and phase boundary slip movement in the FSP sample,and the external vibration energy is converted into internal energy,which is beneficial to improving the high temperature damping behavior performance of the alloy.The damping behavior of the FSPed sample is significantly higher than that of the base metal,and the FSP sample with the rotation speed of 300 r/min has the highest damping behavior.The storage modulus of the ZL108 alloy is decreased as the temperature increase,and the storage modulus of the FSPed sample is higher than that of the base metal.

关 键 词：搅拌摩擦加工 ZL108铝合金 微观结构 阻尼性能 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]