Abstract
Nickel-titanium (NiTi) alloys are considered as hard metal alloys which are extremely difficult to machine materials. This is attributed to the exquisite features of the NiTi alloys that includes high strength, high ductility, and excellent work hardening. As a result, these properties are likely to contribute towards rapid tool wear and high cutting forces during machining processes. In this study, the performance of TiAlN carbide drills in the drilling of NiTi alloys was evaluated in terms of wear growth on the cutting edge of the carbide drills. The thrust forces and the surface finish of drilled holes were also considered as other performance criteria. The drilling experiments were performed under minimum quantity nano-lubrication (MQNL). The results showed that there was a rapid growth in the tool wear on the coated carbide drills when drilling at a high cutting speed. The effect of MQNL towards tool wear growth was only pronounced at a lower range cutting speed. Additionally, application of MQL nanolubricants assisted in reducing the friction between the cutting tool and workpiece, which lowered the thrust force. Improvement in the surface roughness was also evidenced at higher cutting speed due to the complex formation of built-up-edge with the cutting speed.
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Acknowledgements
The authors acknowledged the financial support provided by the Ministry of Higher Education through Fundamental Research Grant Scheme (FRGS) no: FRGS/1/2015/TK03/UNIMAP/02/6. Special thanks to School of Manufacturing Engineering and Faculty of Engineering Technology, Universiti Malaysia Perlis for the overall lab facilities equipped.
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Rosnan, R., Azmi, A.I., Murad, M.N., Ali, M.A.M. (2021). Evaluation of Coated Carbide Drills When Drilling Nickel-Titanium (NiTi) Alloys with Minimum Quantity Nano-lubricants. In: Bahari, M.S., Harun, A., Zainal Abidin, Z., Hamidon, R., Zakaria, S. (eds) Intelligent Manufacturing and Mechatronics. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0866-7_25
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DOI: https://doi.org/10.1007/978-981-16-0866-7_25
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