Ironing effect on surface integrity and fatigue behavior during ultrasonic peening drilling of Ti-6Al-4V

作     者：Yihang LIU Deyuan ZHANG Daxi GENG Zhenyu SHAO Zehua ZHOU Zhefei SUN Yonggang JIANG Xinggang JIANG Yihang LIU;Deyuan ZHANG;Daxi GENG;Zhenyu SHAO;Zehua ZHOU;Zhefei SUN;Yonggang JIANG;Xinggang JIANG

作者机构：School of Mechanical Engineering and AutomationBeihang UniversityBeijing 100191China Institute of Bionic and Micro-Nano SystemsBeihang UniversityBeijing 100191China Aerospace Times Feihong Technology Company LimitedBeijing 100094China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2023年第36卷第5期

页      面：486-498页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51905024 51975035 and 91960203) 

主　　题：Fatigue strength Surface integrity Titanium alloy Tool relief angle Ultrasonic Peening Drilling(UPD) 

摘      要：Imposing compressive residual stress field around a fastening hole serves as a universal method to enhance the hole fatigue strength in the aircraft assembly *** Peening Drilling(UPD)is a recently proposed hybrid hole making process,which can achieve an integration of strengthening and precision-machining with a one-shot-drilling *** to the ironing effect of tool flank surface,UPD introduces large compressive residual stress filed in hole *** order to reveal the strengthening mechanism of UPD,the influence of ultrasonic vibration and tool dynamic relief angle on ironing coverage rate and its corresponding effect on surface integrity in UPD were *** experiments were conducted to verify the influence of ironing effect on surface integrity and fatigue behavior of Ti-6Al-4V hole in *** results indicate that the specimen features smaller surface roughness,higher micro-hardness,plastic deformation degree and circumferential compress residual stress under higher ironing coverage *** fatigue life increases with the raise of ironing coverage rate,and the fatigue source site in UPD shifts from surface to subsurface comparing with that without vibration *** results demonstrates that a better strengthening effect can be obtained by reasonably controlling the ironing coverage rate in UPD.