Effect of Al Content on the Wear Evolution of Ti1-xAlxN-Coated Tools Milling Ti-6Al-4V Alloy

Guanghui Fan; Jingjie Zhang; Peirong Zhang; Jin Du; Chonghai Xu; Mingdong Yi; Guoqing Zhang

doi:10.3390/mi14061228

Effect of Al Content on the Wear Evolution of Ti_1-xAl_xN-Coated Tools Milling Ti-6Al-4V Alloy

Micromachines (Basel). 2023 Jun 10;14(6):1228. doi: 10.3390/mi14061228.

Authors

Guanghui Fan^{1

2}, Jingjie Zhang^{1

2}, Peirong Zhang^{1

2}, Jin Du^{1

2}, Chonghai Xu^{1

2}, Mingdong Yi^{1

2}, Guoqing Zhang^{1

2}

Affiliations

¹ Faculty of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
² Key Laboratory of Equipments Manufacturing and Intelligent Measurement and Control, China National Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.

Abstract

Ti_1-xAl_xN coating is formed by replacing some Ti atoms in TiN with Al atoms, and their properties are closely related to Al content (0 < x < 1). Recently, Ti_1-xAl_xN-coated tools have been widely used in the machining of Ti-6Al-4V alloy. In this paper, the hard-to-machine material Ti-6Al-4V alloy is used as the study material. Ti_1-xAl_xN-coated tools are used for milling experiments. The evolution of the wear form and the wear mechanism of Ti_1-xAl_xN-coated tools are studied, and the influence of Al content (x = 0.52, 0.62) and cutting speed on tool wear are analyzed. The results show that the wear on the rake face changes from the initial adhesion and micro-chipping to coating delamination and chipping. Wear on the flank face varies from the initial adhesion and grooves to boundary wear, build-up layer, and ablation. The main wear mechanisms of Ti_1-xAl_xN-coated tools are dominated by adhesion, diffusion, and oxidation wear. Ti_0.48Al_0.52N coating protects the tool well and extends its service life.

Keywords: Ti-6Al-4V alloy; Ti1-xAlxN-coated tools; evolution of wear form; milling; wear mechanism.

Abstract

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