文献类型：期刊文献

中文题名：Influence of Ultrasonic Surface Rolling Process and Shot Peening on Fretting Fatigue Performance of Ti-6Al-4V

作者：Ning Wang[1];Jinlong Zhu[1];Bai Liu[1];Xiancheng Zhang[1];Jiamin Zhang[1];Shantung Tu[1]

机构：[1]Key Laboratory of Pressurized System and Safety,East China University of Science and Technology,Shanghai 200237,China

年份：2021

卷号：34

期号：6

起止页码：63

中文期刊名：Chinese Journal of Mechanical Engineering

外文期刊名：中国机械工程学报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：Supported by National Key Research and Development Project(Grant No.2018YFC1902400);Natural Science Foundation of Shanghai(Grant No.20ZR1415300).

语种：英文

中文关键词：Ti-6Al-4V;Fretting fatigue;Residual stress;Ultrasonic surface rolling process;Surface strengthening

摘要：At present,there are many studies on the residual stress field and plastic strain field introduced by surface strengthening,which can well hinder the initiation of early fatigue cracks and delay the propagation of fatigue cracks.However,there are few studies on the effects of these key factors on fretting wear.In the paper,shot-peening(SP)and ultrasonic surface rolling process(USRP)were performed on Ti-6Al-4V plate specimens.The surface hardness and residual stresses of the material were tested by vickers indenter and X-ray diffraction residual stress analyzer.Microhardness were measured by HXD-1000MC/CD micro Vickers hardness tester.The effects of different surface strengthening on its fretting fatigue properties were verified by fretting fatigue experiments.The fretting fatigue fracture surface and wear morphology of the specimens were studied and analyzed by means of microscopic observation,and the mechanism of improving fretting fatigue life by surface strengthening process was further explained.After USRP treatment,the surface roughness of Ti-6Al-4V is significantly improved.In addition,the microhardness of the specimen after SP reaches the maximum at 80μm from the surface,which is about 123%higher than that of the AsR specimen.After USRP,it reaches the maximum at 150μm from the surface,which is about 128%higher than that of AsR specimen.It is also found that the residual compressive stress of the specimens treated by USRP and SP increases first and then decreases with the depth direction,and the residual stress reaches the maximum on the sub surface.The USRP specimen reaches the maximum value at 0.18 mm,about?550 MPa,while the SP specimen reaches the maximum value at 0.1 mm,about?380 MPa.The fretting fatigue life of Ti-6Al-4V effectively improved after USRP and SP.The surface integrity of specimens after USRP is the best,which has deeper residual compressive stress layer and more refined grain.In this paper,a fretting wear device is designed to carry out fretting fatigue experiments on specimens with different surface strengthening.