Electrochemical machining of deep narrow slits on TB6 titanium alloys

Deep narrow slits of titanium alloys are extensively used in the aerospace industry. Electrochemical machining (ECM) is suitable for fabricating deep narrow slits owing to its advantages such as no tool wear, no residual stress, and no thermal stress. However, the machining surface of titanium alloy...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2017-09, Vol.92 (5-8), p.3063-3071
Main Authors: Wang, Feng, Zhao, Jianshe, Lv, Yanming, Yang, Zhenwen, Yao, Jun, He, Yafeng, Tian, Zongjun
Format: Article
Language:English
Subjects:
Aerospace industry
CAE) and Design
Computer-Aided Engineering (CAD
Current efficiency
Dissolution
Electrochemical machining
Electrolytes
Engineering
Feeding
Industrial and Production Engineering
Machining
Mechanical Engineering
Media Management
Original Article
Passivity
Pitting (corrosion)
Pitting (wear)
Residual stress
Slits
Surface properties
Thermal stress
Titanium alloys
Titanium base alloys
Tool wear
Vibration
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Summary:Deep narrow slits of titanium alloys are extensively used in the aerospace industry. Electrochemical machining (ECM) is suitable for fabricating deep narrow slits owing to its advantages such as no tool wear, no residual stress, and no thermal stress. However, the machining surface of titanium alloy is prone to passivation, and the pitting is prone to generating on the non-machined surface, which restricts forming precision enhancement. In this study, the electrochemical dissolution characteristics of TB6 titanium alloy were investigated using the method of electrolyte lateral flow, and the experiments of the deep narrow slit machining were also conducted on the basis of the self-developed vibration apparatus. The results reveal that the mixed electrolyte composed of NaCl and NaNO 3 is capable of enhancing the current efficiency and surface quality of TB6 titanium alloy. Moreover, the average slit width at the entrance of the deep narrow slit is limited at 2.48 mm, and the average slit width in the depth direction is limited at 2.67 mm using the method of vibration superimposed on the high-speed linear feeding.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-017-0392-0