Title: Evaluation of tool wear mechanism of TiAlN coated tools when drilling Ti-6Al-4V

Authors: Erween A. Rahim, Safian Sharif

Addresses: Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Johor 86400, Malaysia. ' Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Skudai, Johor 81310, Malaysia

Abstract: Drilling of Ti-6Al-4V with Supernitride coated carbide tool gave better performance in term of tool life compared to TiAlN coated carbide tool. The use of 25 m/min cutting speed shows improvement in tool life performance. Non-uniform flank wear, excessive chipping and micro-cracking were the dominant tool failure modes under most tested conditions. Adhesion, attrition and diffusion were the operating wear mechanism on both tools when drilling Ti-6Al-4V.

Keywords: drilling; tool wear; tool life; wear mechanisms; TiAlN coatings; supernitride; titanium aluminium nitride; coated carbide tools; flank wear, excessive chipping; microcracking; tool failure; adhesion; attrition; diffusion.

DOI: 10.1504/IJMTM.2009.023950

International Journal of Manufacturing Technology and Management, 2009 Vol.17 No.4, pp.327 - 336

Published online: 22 Mar 2009 *

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