Material removal mechanisms in ultrasonic vibration-assisted high-efficiency deep grindingγ-TiAl alloy  

作　　者：Tao CHEN Xiaowei WANG Biao ZHAO Wenfeng DING Mingyue XIONG Jiuhua XU Qi LIU Dongdong XU Yanjun ZHAO Jianhui ZHU 

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]Centre for Precision Manufacturing,University of Strathclyde,Glasgow G11XJ,UK [3]School of Mechanical Engineering,Tongji University,Shanghai 201804,China [4]State Key Laboratory for High Performance Tools,Zhengzhou Research Institute for Abrasives and Grinding Co.LTD,Zhengzhou 450001,China

出　　处：《Chinese Journal of Aeronautics》2024年第11期462-476,共15页中国航空学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.92160301,92060203,52175415 and 52205475);the Science Center for Gas Turbine Project(Nos.P2022-AB-Ⅳ-002-001 and P2023-B-Ⅳ-003-001);the Natural Science Foundation of Jiangsu Province(No.BK20210295);the Superior Postdoctoral Project of Jiangsu Province(No.2022ZB215);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX23_0355);the Interdisciplinary Innovation Fund for Doctoral Students of Nanjing University of Aeronautics and Astronautics(KXKCXJJ202305);the Fundamental Research Funds for the Central Universities(Nos.NS2023028 and NG2024015)。

摘　　要：Gamma titanium-aluminum intermetallic compounds(γ-TiAl)have gained considerable attentions in the aerospace industry due to their exceptional thermal resilience and comprehensive attributes,making them a prime example of lightweight and advanced materials.To address the frequent occurrence of burns and severe tool deterioration during the process of high-efficiency deep grinding(HEDG)onγ-TiAl alloys,ultrasonic vibration-assisted high-efficiency deep grinding(UVHEDG)has been emerged.Results indicate that in UVHEDG,the grinding temperature is on average 15.4%lower than HEDG due to the employment of ultrasonic vibrations,enhancing coolant penetration into the grinding area and thus reducing heat generation.Besides,UVHEDG possesses superior performance in terms of grinding forces compared to HEDG.As the material removal volume(MRV)increases,the tangential grinding force(F_(t))and normal grinding force(F_(n))of UVHEDG increase but to a lesser extent than in HEDG,with an average reduction of16.25%and 14.7%,respectively.UVHEDG primarily experiences microfracture of grains,whereas HEDG undergoes large-scale wear later in the process due to increased grinding forces.The surface roughness(R_(a))characteristics of UVHEDG are superior,with the average value of R_(a)decreasing by 46.5%compared to HEDG as MRV increases.The surface morphology in UVHEDG exhibits enhanced smoothness and a shallower layer of plastic deformation.Grinding chips generated by UVHEDG show a more shear-like shape,with the applied influence of ultrasonic vibration on chip morphology,thereby impacting material removal behaviors.These aforementioned findings contribute to enhanced machining efficiency and product quality ofγ-TiAl alloys after employing ultrasonic vibrations into HEDG.

关 键 词：Ultrasonic vibration-assisted high-efficiency deep grinding Grinding temperature Grinding forces Surface roughness Chip formation 

分 类 号：TG146.23[一般工业技术—材料科学与工程] V261.92[金属学及工艺—金属材料]