Gradient nanostructure enabled exceptional fretting fatigue properties of Inconel 718 superalloy through submerged abrasive waterjet peening  

作　　者：Shulei YAO Yuxin CHI Xianhao ZHU Kaiming ZHANG Tiwen LU Kaishang LI Ning WANG Chengcheng ZHANG Shuang LIU Xiancheng ZHANG Shantung TU 

机构地区：[1]Key Laboratory of Pressure Systems and Safety,Ministry of Education,School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China [2]AECC Commercial Aircraft Engine Co.LTD,Shanghai Engineering Research Center for Commercial Aircraft Engine,Shanghai 201108,China

出　　处：《Chinese Journal of Aeronautics》2025年第1期586-606,共21页中国航空学报(英文版)

基　　金：financially supported by the National Key Research and Development Project,China(Nos.2018YFA0703300,2022YFB4600019);the National Natural Science Foundation of China(Nos.52275148,52405154);the Innovation Program Phase II of AECC Commercial Aircraft Engine Co.Ltd,China(No.HT-3RJC1053-2020);support by the Postdoctoral Fellowship Program of CPSF,China(No.GZB20240219);the Shanghai Sailing Program,China(No.24YF2708100).

摘　　要：Submerged Abrasive Waterjet Peening(SAWJP)shows great application potential in augmenting the fatigue properties of metallic parts.Thus,the present work aims to investigate the influence of SAWJP on the Surface Integrity(SI)and Fretting Fatigue(FF)properties of Inconel 718(IN718)superalloy and illustrate the microstructural evolution,FF life improvement,and fretting wear mechanism.First,the SI of the IN718 specimen was examined following treatment via SAWJP.Results showed that the specimen subjected to SAWJP formed a total plastic deformation layer of 56μm.The maximum microhardness and Compressive Residual Stress(CRS)measured across the depth of the SAWJP-treated specimens exhibited an increase in values ranging between 522 HV and 541 HV and 1171–1380 MPa,respectively.The FF test results of the specimen before and after SAWJP treatment at ambient temperatures indicated that the FF life of the SAWJP-treated specimen surpassed that of the as-received specimen by a factor of 2.81.The examination of the FF fracture,contact surface,and crack propagation behavior revealed the crucial factors contributing to the enhanced FF resistance of the IN718 specimen,including the gradient nanostructure characterized by ultra-refined grains,substantial CRS,and elevated microhardness,which were all induced by the SAWJP treatment.

关 键 词：Submerged abrasive waterjet peening Inconel 718 superalloy Microstructural evolution Surface integrity Fretting fatigue 

分 类 号：TG668[金属学及工艺—金属切削加工及机床] TG132.3[一般工业技术—材料科学与工程]