Dry sliding wear behavior of extruded Mg-Sn-Yb alloy  

作　　者：姜静 毕广利 赵磊 李荣广 连建设 江中浩 

机构地区：[1]Key Laboratory of Automobile Materials, College of Materials Science and Engineering, Jilin University [2]State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology [3]School of Mechanical Engineering, Shenyang University of Chemical Technology

出　　处：《Journal of Rare Earths》2015年第1期77-85,共9页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51371089,51301082,51201158)

摘　　要：The dry sliding wear behavior of extruded Mg-9Sn and Mg-9Sn-3Yb alloys through pin-on-disc configuration was investigated at room temperature. Coefficient of friction, wear rate and wear resistance of extruded Mg-9Sn and Mg-9Sn-3Yb alloys were measured within a load range of 20-240 N and 20-380 N at a sliding velocity of 0.785 m/s, respectively. The wear tracks, worn surface and wear edge were observed using a scanning electron microscope and an energy dispersive X-ray spectrometer. The results indicated that wear rate, coefficient of friction and wear resistance changed with increasing applied load due to different wear mechanisms. Six wear mechanisms, namely adhesion, abrasion, oxidation, delamination, thermal softening and melting, were observed for both extruded alloys. The extruded Mg-9Sn-3Yb alloy exhibited good wear resistance compared with extruded Mg-9Sn alloy, which was mainly attributed to a large number of volume fraction of Mg2 Sn particles, the formation of thermal stable Mg2（Sn,Yb） particles and good elevated temperature mechanical properties.The dry sliding wear behavior of extruded Mg-9Sn and Mg-9Sn-3Yb alloys through pin-on-disc configuration was investigated at room temperature. Coefficient of friction, wear rate and wear resistance of extruded Mg-9Sn and Mg-9Sn-3Yb alloys were measured within a load range of 20-240 N and 20-380 N at a sliding velocity of 0.785 m/s, respectively. The wear tracks, worn surface and wear edge were observed using a scanning electron microscope and an energy dispersive X-ray spectrometer. The results indicated that wear rate, coefficient of friction and wear resistance changed with increasing applied load due to different wear mechanisms. Six wear mechanisms, namely adhesion, abrasion, oxidation, delamination, thermal softening and melting, were observed for both extruded alloys. The extruded Mg-9Sn-3Yb alloy exhibited good wear resistance compared with extruded Mg-9Sn alloy, which was mainly attributed to a large number of volume fraction of Mg2 Sn particles, the formation of thermal stable Mg2（Sn,Yb） particles and good elevated temperature mechanical properties.

关 键 词：Mg-Sn-Yb alloy coefficient of friction wear resistance wear mechanism rare earths 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TH117[金属学及工艺—金属材料]