Investigation of dry sliding wear properties of multi-directional forged Mg-Zn alloys  

作　　者：S.Ramesh Gajanan Anne H.Shivananda Nayaka Sandeep Sahu M.R.Ramesh 

机构地区：[1]Department of Mechanical Engineering,National Institute of Technology Karnataka,Surathkal 575025,India [2]Department of Mechanical Engineering,Shri Madhwa Vadiraja Institute of Technology and Management,Udupi,Karnataka 574115,India [3]Department of Materials Science and Engineering,Indian Institute of Technology Kanpur,Kanpur 208016,India

出　　处：《Journal of Magnesium and Alloys》2019年第3期444-455,共12页镁合金学报（英文）

摘　　要：Effect of multi-directional forging(MDF)on wear properties of Mg-Zn alloys(with 2,4,and 6wt%Zn)is investigated.Dry sliding wear test was performed using pin on disk machine on MDF processed and homogenized samples.Wear behavior of samples was analyzed at loads of ION and 20 N,with sliding distances of 2000m and 4000m,at a sliding velocity of 3m/s.Microstructures of worn samples were observed under scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),and x-ray diffraction(XRD)and the results were analyzed.Mechanical properties were evaluated using microhardness test.After 5 passes of MDF,the average grain size was found to be 30±4p m,22±3 pm,and 18±3 pm,in Mg-2%Zn,Mg-4%Zn,and Mg-6%Zn alloys,respectively,with significant improvement in hardness in all cases.Wear resistance was improved after MDF processing,as well as,with increment in Zn content in Mg alloy.However,it decreased when the load and the sliding distance increased.Worn surface exhibited ploughing,delamination,plastic deformation,and wear debris along sliding direction,and abrasive wear was found to be the main mechanism.

关 键 词：Multi-directional forging Mg-Zn alloy MICROHARDNESS WEAR Coefficient of friction 

分 类 号：TG1[金属学及工艺—金属学]