Dissolution Characteristics of New Titanium Alloys in Electrochemical Machining  

作　　者：Chen Xuezhen Zhu Dong Xu Zhengyang Liu Jia Zhu Di 

机构地区：[1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2016年第5期610-619,共10页南京航空航天大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51205199);the Program for New Century Excellent Talents in University (No.NCET12-0627);the Funding of Jiangsu Innovation Program for Graduate Education (No.CXLX13_141);the Fundamental Research Funds for the Central Universities

摘　　要：We focus on the electrochemical dissolution characteristics of new titanium alloys such as near-αtitanium alloy Ti60,α+βtitanium alloy TC4andβtitanium alloy Ti40 which are often used for aerospace industry.The experiments are carried out by electrochemical machining tool,and the surface morphology of the specimens is observed by the scanning electron microscope(SEM)and three-dimensional video microscope(DVM).The appropriate electrolyte is selected and the relationships between surface roughness and current density are achieved.The results show that the single-phase titanium alloy Ti40 has a better surface roughness after ECM compared with theα+βtitanium alloy TC4 and the near-αtitanium alloy Ti60.The best surface roughness is Ra 0.28μm when the current density is 75A/cm2.Furthermore,the surface roughness of the near-αtitanium alloy Ti60 is the most sensitive with the current density because of the different electrochemical equivalents of substitutional elements and larger grains than TC4.Finally,the suitable current density for each titanium alloy is achieved.We focus on the electrochemical dissolution characteristics of new titanium alloys such as near-α titanium alloy Ti60, α＋βtitanium alloy TC4 and 13 titanium alloy Ti40 which are often used for aerospace industry. The ex- periments are carried out by electrochemical machining tool, and the surface morphology of the specimens is ob- served by the scanning electron microscope （SEM） and three-dimensional video microscope （DVM）. The appropri- ate electrolyte is selected and the relationships between surface roughness and current density are achieved. The re- sults show that the single-phase titanium alloy Ti40 has a better surface roughness after ECM compared with the α＋β titanium alloy TC4 and the near- α titanium alloy Ti60. The best surface roughness is Ra O. 28μm when the current density is 75 A/cm2. Furthermore, the surface roughness of the near-a titanium alloy Ti60 is the most sen- sitive with the current density because of the different electrochemical equivalents of substitutional elements and larger grains than TC4. Finally, the suitable current density for each titanium alloy is achieved.

关 键 词：electrochemical machining(ECM) titanium alloy substitutional element electrochemical equivalent surface roughness 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]