温度在γ-钛铝合金摩擦磨损摩擦层中的作用

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Friction Pub Date : 2024-02-02 DOI:10.1007/s40544-023-0807-x
Yulei Yang, Hongfei Shang, Huiping Pei, Jimin Xu, Yi Liang, Minghui Pan
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引用次数: 0

摘要

摩擦层的形成可能对摩擦磨损有重大影响。在温度升高时,磨损碎屑之间的粘附力和扩散速度的增加有利于摩擦层的形成。然而,高温下氧化作用的加强和氧化物的低扩散率可能会起到不利作用。本研究旨在使用γ-TiAl 合金研究摩擦层在摩擦磨损中的温度作用。利用扫描电子显微镜、能量色散光谱仪、拉曼光谱仪、透射电子显微镜和纳米压痕法研究了磨损碎片、摩擦层和磨损疤痕。摩擦试验表明,与室温(RT)和 350 ℃ 时相比,550 ℃ 和 750 ℃ 时的磨损率明显降低,摩擦系数的波动也明显减小。研究还发现,当温度从室温(RT)升高到 750 ℃ 时,磨损碎屑的氧化程度略有增加,扩散系数显著提高,这有利于形成良好的摩擦烧结摩擦层。三层烧结摩擦层结构均匀,晶粒呈纳米晶状,具有优异的机械性能,从而提高了γ-TiAl合金在550和750 ℃下的抗摩擦磨损性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Role of temperature in tribolayers in fretting wear of γ-TiAl alloy

Role of temperature in tribolayers in fretting wear of γ-TiAl alloy

The formation of tribolayers may play significant influences on fretting wear. At elevated temperature, the adhesion among wear debris and the increased diffusion rate facilitate the formation of tribolayers. However, the intensification of oxidation at elevated temperature and the low diffusion rate in oxides may play an adverse role. The present study aims to investigate the role of temperature in tribolayers in fretting wear using a γ-TiAl alloy. Scanning electron microscope, energy dispersive spectrometer, Raman spectrometer, transmission electron microscope and nanoindentation were utilized to investigate the wear debris, tribolayers, and wear scars. The fretting tests showed that, compared with that at room temperature (RT) and 350 °C, significant reduction in wear rate and decrease in the fluctuation of friction coefficient occurred at 550 and 750 °C. It was further revealed that when temperature raised from room temperature (RT) to 750 °C, the oxidation of the wear debris increased slightly and the diffusion coefficients increased prominently, which facilities the formation of well tribo-sintered tribolayers. The well tribo-sintered tribolayers presented homogenous structure, nanocrystalline grains with excellent mechanical properties, and resulted in the improvement in the fretting wear resistance of the γ-TiAl alloy at 550 and 750 °C.

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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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