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Investigations on corrosion resistance behavior in micro-milling of Ti-6Al-4V and Ti-6Al-7Nb alloy: a comparative study

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Abstract

We compared the corrosion resistance behavior of Ti-6Al-4V and Ti-6Al-7Nb alloy in micro-milling operation. The influence of parameters such as cutting speed (vc), feed per tooth (fz) and depth of cut (ap) on corrosion behavior was analyzed. A total of 18 micro-slots of size 500 µm width and 10 mm length were produced by using Taguchi L9 based experimental design approach with the help of tungsten carbide flat end-mill cutter. Corrosion studies were performed using a potentiostat in an electrochemical cell with simulated body fluid. Surface morphology study revealed the surface damage before and after corrosion test. A minimal corrosion rate of 11.22 mm/year and 2.99 mm/year was observed for Ti-6Al-4V and Ti-6Al-7Nb, respectively. Ti-6Al-7Nb alloy showed the lowest corrosion rate due to the formation of TiO2 protective layer which offered a higher corrosion resistance.

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Acknowledgments

We would like to acknowledge the Science and Engineering Research Board (SERB), Government of India for providing monetary support and encouragement to carry out this research work through Early Career Research Award No: ECR/2016/ 001330.

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Authors and Affiliations

  1. Department of Production Engineering, PSG College of Technology, Coimbatore, India

    D. Avinash & S. P. Leo Kumar

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  1. D. Avinash
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  2. S. P. Leo Kumar
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Correspondence to S. P. Leo Kumar.

Additional information

S. P. Leo Kumar is an Associate Professor in Production Engineering Department at PSG College of Technology, Coimbatore, India. He received his M.Tech. and Ph.D. from National Institute of Technology, Tiruchirappalli, Tamilnadu, India. His research interests include Micromachining, Intelligent Manufacturing, CAD/CAM.

D. Avinash is a Full Time Research Scholar in Production Engineering Department at PSG College of Technology, Coimbatore, India.

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Avinash, D., Kumar, S.P.L. Investigations on corrosion resistance behavior in micro-milling of Ti-6Al-4V and Ti-6Al-7Nb alloy: a comparative study. J Mech Sci Technol 34, 3757–3765 (2020). https://doi.org/10.1007/s12206-020-0827-7

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