Microstructure and fretting wear properties of Ti-Al coatings fabricated by laser cladding on a Ti-6Al-4V alloy

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-05-08 DOI:10.1016/j.optlastec.2025.113066

Zhen Gong , Daosheng Wen , Beibei Kong , Yang Qiao , Zhen Xiao , Yuhang Wang , Yanxing Ding , Qinghua Lv , Minghao Zhang , Yongshuo Sun , Shouren Wang

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Abstract

In this study, Ti-Al coatings were successfully deposited on a Ti-6Al-4V alloy through laser cladding technology. The microstructure of the Ti-Al coatings was investigated, and the optimal process parameters were determined. Fretting wear properties of the Ti-Al coatings were analyzed. The results showed that the Ti-Al coating samples exhibited a gradient microstructure. With the increase in laser power and powder feeding rate, the Ti-Al coating samples exhibited better mechanical properties due to finer grains, stronger texture component, and higher microhardness. In the fretting wear properties, the gradient microstructure of the Ti-Al coating sample led to an increase in microhardness. An increase in hardness within a certain range leads to a decrease in wear weight loss, which improves wear properties. Meanwhile, the debris formed a third body layer that acted as a solid lubricant, significantly reducing the average coefficient of friction (COF) and wear volume, thus improving the wear resistance properties. Moreover, the wear mechanisms of Ti-6Al-4V and Ti-Al coating samples under different normal loads were elucidated.

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Ti-6Al-4V合金激光熔覆Ti-Al涂层的显微组织和微动磨损性能

在本研究中，通过激光熔覆技术成功地在Ti-6Al-4V合金上沉积了Ti-Al涂层。研究了Ti-Al涂层的显微组织，确定了最佳工艺参数。分析了Ti-Al涂层的微动磨损性能。结果表明，Ti-Al涂层样品呈现梯度组织。随着激光功率和粉末进料速率的增加，Ti-Al涂层样品的晶粒更细，织构成分更强，显微硬度更高，具有更好的力学性能。在微动磨损性能方面，Ti-Al涂层样品的梯度组织导致显微硬度的提高。硬度在一定范围内提高，磨损失重减小，耐磨性能得到改善。同时，碎屑形成第三体层，起到固体润滑剂的作用，显著降低了平均摩擦系数（COF）和磨损体积，提高了耐磨性能。分析了Ti-6Al-4V和Ti-Al涂层试样在不同法向载荷下的磨损机理。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems