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Performance Analysis of Machining Ti–6Al–4V Under Cryogenic CO2 Using PVD-TiN Coated Tool

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Abstract

Demand for titanium alloys in different sectors is increasing in recent years due to their outstanding strength-to-weight ratio, ability to retain strength at higher temperatures and resistance to wear. Machining of titanium Ti–6Al–4V has an adverse influence from the premature failure of the tool. Conventional cooling technique fails to reduce the temperature generated at the cutting area attributed to poor surface quality. Liquid carbon dioxide (LCO2) as a cryogenic coolant has turned into a recent trend in machining as it does not require any expensive method of disposal. This experiment investigates the performance of cryogenic cooling technique in the end milling of Ti–6Al–4V using PVD-TiN-coated tool with a different speed-feed combination. The angle of the nozzle was maintained 45° in the feed direction. The results demonstrated that machining with LCO2 lowers the cutting temperature by 39.53–57.44% and surface roughness by 48.24–74.77% compared with wet machining. The impact of utilizing LCO2 as a cryogenic coolant improved the surface and subsurface characteristics.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Saveetha Engineering College, Chennai, India

    K. Nimel Sworna Ross

  2. Department of Mechanical Engineering, St. Joseph’s College of Engineering, Chennai, India

    M. Ganesh

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  1. K. Nimel Sworna Ross
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  2. M. Ganesh
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Nimel Sworna Ross, K., Ganesh, M. Performance Analysis of Machining Ti–6Al–4V Under Cryogenic CO2 Using PVD-TiN Coated Tool. J Fail. Anal. and Preven. 19, 821–831 (2019). https://doi.org/10.1007/s11668-019-00667-1

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  • DOI: https://doi.org/10.1007/s11668-019-00667-1

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