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Micromachines 2018, 9(11), 568;

Cutting Performance of Different Coated Micro End Mills in Machining of Ti-6Al-4V

Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China
Author to whom correspondence should be addressed.
Received: 26 August 2018 / Revised: 27 October 2018 / Accepted: 29 October 2018 / Published: 2 November 2018
(This article belongs to the Section A:Physics)
PDF [5069 KB, uploaded 2 November 2018]


Tool wear is a significant issue for the application of micro end mills. This can be significantly improved by coating materials on tool surfaces. This paper investigates the effects of different coating materials on tool wear in the micro milling of Ti-6Al-4V. A series of cutting experiments were conducted. The tool wear and workpiece surface morphology were investigated by analyzing the wear of the end flank surface and the total cutting edge. It was found that, without coating, serious tool wear and breakage occurred easily during milling. However, AlTiN-based and AlCrN-based coatings could highly reduce cutting edge chipping and flank wear. Specifically, The AlCrN-based coated mill presented less fracture resistance. For TiN coated micro end mill, only slight cutting edge chipping occurred. Compared with other types of tools, the AlTiN-based coated micro end mill could maximize tool life, bringing about an integrated cutting edges with the smallest surface roughness. In short, the AlTiN-based coating material is recommended for the micro end mill in the machining of Ti-6Al-4V. View Full-Text
Keywords: micro end milling; coating materials; tool wear; Ti-6Al-4V micro end milling; coating materials; tool wear; Ti-6Al-4V

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Liang, Z.; Gao, P.; Wang, X.; Li, S.; Zhou, T.; Xiang, J. Cutting Performance of Different Coated Micro End Mills in Machining of Ti-6Al-4V. Micromachines 2018, 9, 568.

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