Fretting wear behaviour of machined layer of nickel-based superalloy produced by creep-feed profile grinding

查看全文 作　　者：Weijie [1]KUANG;Qing [2]MIAO;Wenfeng [1]DING;Yanjun [3]ZHAO;Biao [1]ZHAO;Xuebing [4]WEN;Shaopeng [4]LI

机构地区：[1]National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;[2]College of Mechanical Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;[3]State Key Laboratory of Super abrasives,Zhengzhou Research Institute for Abrasive&Grinding Co.Ltd,Zhengzhou 450001,China;[4]AECC Xi'An Aero-Engine LTD,Xi'an 710021,China

出　　处：《Chinese Journal of Aeronautics》索引2022年第35卷第10期,共11页

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51921003 and 51775275);National Major Science and Technology Projects of China(No.2017-VII-0002-0095);Six Talents Summit Project in Jiangsu Province(No.JXQC-002)。 摘　　要：Fretting wear has an adverse impact on the fatigue life of turbine blade roots.The current work is to comparatively investigate the fretting wear behaviour of the nickel-based superalloy surfaces produced by polishing and creep-feed profile grinding,respectively,in terms of surface/subsurface fretting damage,the friction coefficient,wear volume and wear rate.Experimental results show that the granulated tribolayer aggravates the workpiece wear,while the flat compacted tribolayer enhances the wear resistance ability of workpiece,irrespective of whether the workpiece is processed by polishing or grinding.However,the wear behaviors of tribolayers are different.For the polished surface,when the normal load exceeds 100 N,the main defects are crack,rupture,delamination and peeling of workpiece materials;the wear mechanism changes from severe oxidative wear to fatigue wear and abrasive wear when the loads increase from 50 to 180 N.As for the ground surface,the main wear mechanism is abrasive wear.Particularly,the ground surface possesses better wear-resistant ability than the polished surface because the former has the lower values in coefficient friction(0.23),wear volume(0.06×10^(6)μm^(3))and wear rate(0.25×10^(-16)Pa^(-1)).Finally,an illustration is given to characterize the evolution of wear debris on such nickel-based superalloy on the ground surface. 关键词：Creep-feed profile grinding Fretting wear Nickel-based superalloy TRIBOLAYER Wear debris

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Fretting wear behaviour of machined layer of nickel-based superalloy produced by creep-feed profile grinding

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