Machinability ofγ-TiAl:A review  

作　　者：Ziwen XIA Chenwei SHAN Menghua ZHANG Minchao CUI Ming LUO 

机构地区：[1]Key Laboratory of High Performance Manufacturing for Aero Engine,Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi’an 710072,China [2]Engineering Research Center of Advanced Manufacturing Technology for Aero Engine,Ministry of Education,Northwestern Polytechnical University,Xi’an 710072,China [3]State Key Laboratory of Cemented Carbide,Zhuzhou 412000,China

出　　处：《Chinese Journal of Aeronautics》2023年第7期40-75,共36页中国航空学报（英文版）

基　　金：co-supported by the Science Center for Gas Turbine Project,China(No.P2022-A-IV-001-002);the National Natural Science Foundation of China(Nos.51875473 and 91960203).

摘　　要：Owing to its outstanding mechanical properties,γ-TiAl is desirable materials for crossgeneration aero-engines.Nearly 70 years of exploration have made it into the initial application.However,the intrinsic brittleness ofγ-TiAl is still a critical obstacle to its large-scale applications.In this context,researchers have made many attempts to study the machinability ofγ-TiAl.At present,existing relevant reviews have mostly discussed the processing methods ofγ-TiAl.Hence,there is still a lack of a perspective on material properties to analyze the cutting mechanism.Herein,this paper provides the systematic review of such perspectives.Above all,the developmental process,phase transformation,and microstructural evolution ofγ-TiAl are discussed,as well as its deformation mechanism at quasi-static.These topics can provide a materials science foundation for the machining ofγ-TiAl.And then,the review focuses on the cutting mechanism and surface integrity ofγ-TiAl.Moreover,special attention is paid to the microscope deformation mechanism and surface defects evolution ofγ-TiAl during cutting.Finally,the review indicates that the highperformance machining technology ofγ-TiAl faces challenges and proposes potential future research directions.Solving the difficulties during machiningγ-TiAl aero-engine components will accelerate the development of new aero-engines.

关 键 词：Cutting mechanism DEFORMATION MACHINABILITY Surface integrity Γ-TIAL 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]