An effective strategy to improve the tribological performance of Ni55Ti45 alloy at elevated temperatures by oxygen doping

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2025-06-11 DOI:10.1016/j.triboint.2025.110884

Yuyou Ranliang , Jiaxuan Huang , Zilong Huo , Xinyue Hu , Minghui Lang , Lihong Su , Guanyu Deng , Long Wang , Haifeng Wang

引用次数: 0

Abstract

This study investigated the effects of oxygen doping on the mechanical and tribological properties of Ni55Ti45 alloy at high temperature. It was found that adding 2 at%O increased the alloy's hardness by 22 % and reduced the friction coefficient to 0.286. At 500 °C, the wear rate of the oxygen-doped alloy was reduced to 0.38 × 10⁻⁵ mm³ /(m N), exhibiting the best wear resistance. These improvements were attributed to the in-situ formed precipitated oxide phases and glaze layer induced by the shear force during the friction process at high temperature. The wear mechanism transitioned from abrasive wear and fatigue delamination at RT to oxidation wear at 500 °C. This work demonstrated that oxygen doping is an effective strategy to improve the high temperature tribological properties of Ni55Ti45 alloy.

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氧掺杂是提高Ni55Ti45合金高温摩擦磨损性能的有效方法

研究了氧掺杂对Ni55Ti45合金高温力学性能和摩擦学性能的影响。结果表明，在%O浓度下加入2 可使合金硬度提高22 %，摩擦系数降低到0.286。在500℃时，掺氧合金的磨损率降至0.38 × 10⁻mm³ /(m N)，表现出最佳的耐磨性。这些改进是由于高温摩擦过程中剪切力诱导原位形成的析出的氧化相和釉层。磨损机制由高温下的磨粒磨损和疲劳脱层转变为500℃时的氧化磨损。结果表明，氧掺杂是改善Ni55Ti45合金高温摩擦学性能的有效方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.