The tribological behavior of a surface-nanocrystallized magnesium alloy AZ31 sheet after ultrasonic shot peening treatment

查看全文 作　　者：Jianyue [1]Zhang;Yongxin [2]Jian;Xuzhe [3]Zhao;Dean [4]Meng;Fusheng [5]Pan;Qingyou [1]Han

机构地区：[1]School of Engineering Technology,Purdue University,West Lafayette,IN 47906,USA;[2]State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,PR China;[3]Böllhoff Inc,Troy,MI 48084,USA;[4]School of Automobile,Chang’an University,Xi’an 710064,PR China;[5]College of Materials Science and Engineering,Chongqing University,Chongqing 400045,PR China

出　　处：《Journal of Magnesium and Alloys》索引2021年第9卷第4期,共14页

摘　　要：A magnesium alloy AZ31 sheet was processed by ultrasonic shot peening treatment to fabricate a surface nanocrystalline,and a ball-on-disk dry sliding wear test was performed to evaluate the tribological behavior after treatment.The microstructure observation indicated a gradient nanocrystalline structure was formed after USSP treatment.The microhardness at the top surface was improved from 60 HV to 145 HV after treatment.The formed nanocrystalline resulted in an easy formation of MgO patches on the surface and reduced the coefficient of friction.Moreover,the formed nanocrystalline leaded to a retard of delamination with increasing the sliding speed and applied load,which was due to its stronger sub-surface.Under high sliding speed(0.5 m/s)and high applied load(50 N),it was firstly found that the formed nanocrystalline prevented the happening of thermal softening and melting.The possible reasons accounting for the prevention of thennal softening and melting were discussed accordingly. 关键词：AZ31Mg alloy Ultrasonic shot peening Surface-nanocrystallization Wear mechanism

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The tribological behavior of a surface-nanocrystallized magnesium alloy AZ31 sheet after ultrasonic shot peening treatment

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耦合文献(219)

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