Powder mixed electrochemical discharge process for micro machining of C103 niobium alloy

作     者：Niladri Mandal Nitesh Kumar Alok Kumar Das Niladri Mandal;Nitesh Kumar;Alok Kumar Das

作者机构：Defence Research&Development Laboratory(DRDL)-DRDOHyderabadIndia Department of Mechanical EngineeringIndian Institute of Technology(ISM)DhanbadIndia 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2023年第26卷第8期

页      面：84-101页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0825[工学-航空宇航科学与技术] 

主　　题：Micro-electrochemical discharge machining C103 niobium alloy Surface integrity Material removal rate Hybrid powder mixed ECDM 

摘      要：This work demonstrates the viability of the powder-mixed micro-electrochemical discharge machining(PMECDM) process to fabricate micro-holes on C103 niobium-based alloy for high temperature applications.Three processes are involved simultaneously i.***.spark erosion,chemical etching,and abrasive grinding for removal of material while the classical electrochemical discharge machining process involves double actions i.***.spark erosion,and chemical etching.The powder-mixed electrolyte process resulted in rapid material removal along with a better surface finish as compared to the classical microelectrochemical discharge machining(MECDM).Further,the results are optimized through a multiobjective optimization approach and study of the surface topography of the hole wall surface obtained at optimized parameters.In the selected range of experimental parameters,PMECDM shows a higher material removal rate(MRR) and lower surface roughness(R_(a))(MRR:2.8 mg/min and R_(a) of 0.61 μm) as compared to the MECDM process(MRR:2.01 mg/min and corresponding Raof 1.11 μm).A detailed analysis of the results is presented in this paper.