Mechanical properties of CoCrFeNi-X (X = Ti,Sn) high entropy alloy and tribological properties in simulated seawater environment

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL Tribology International Pub Date : 2024-10-09 DOI:10.1016/j.triboint.2024.110306

Xinghua Zhang , Zisi Jiang , Hao Chen , Muye Niu , Jun Cheng

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Abstract

Five multimajor element CoCrFeNi-X(X = Ti,Sn) high entropy alloys (HEA) were prepared by vacuum hot press sintering. The phase composition, mechanical properties and tribological properties of CoCrFeNi-X(X = Ti,Sn) alloys in simulated seawater were investigated. The phase structure of CoCrFeNiTi high-entropy alloy is solid solution FCC phase, R phase, σ phase, and Laves phase. But after addition Sn elements, the phase structure become the FCC phase and Ni-Sn solid solution phase. CoCrFeNiTi alloy has lower density (7.17 g/cm³) and higher hardness (750 HV) than that of CoCrFeNiSn. The compressive yield strength of CoCrFeNiTi HEA is better than CoCrFeNiSn HEA. The CoCrFeNiSn high-entropy alloys showed lower wear rates. The main reason is that SnO₂ is generated on the wear scar surface, which has good wetting and corrosion inhibition effects, so CoCrFeNiSn HEA shows better wear resistance in simulated seawater. The main wear mechanism of the CoCrFeNiSn HEA is abrasive wear, oxidative wear, exfoliation wear and corrosive wear.

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CoCrFeNi-X (X = Ti,Sn) 高熵合金在模拟海水环境中的机械性能和摩擦学性能

通过真空热压烧结法制备了五种多主量元素 CoCrFeNi-X(X = Ti,Sn)高熵合金（HEA）。研究了模拟海水中 CoCrFeNi-X(X = Ti,Sn) 合金的相组成、力学性能和摩擦学性能。CoCrFeNiTi 高熵合金的相结构为固溶体 FCC 相、R 相、σ 相和 Laves 相。但加入锡元素后，相结构变为 FCC 相和 Ni-Sn 固溶相。与 CoCrFeNiSn 相比，CoCrFeNiTi 合金的密度（7.17 g/cm3）更低，硬度（750 HV）更高。CoCrFeNiTi HEA 的抗压屈服强度优于 CoCrFeNiSn HEA。CoCrFeNiSn 高熵合金的磨损率较低。主要原因是磨损痕表面生成了 SnO2，具有良好的润湿和缓蚀效果，因此 CoCrFeNiSn HEA 在模拟海水中表现出更好的耐磨性。CoCrFeNiSn HEA 的主要磨损机理是磨料磨损、氧化磨损、剥离磨损和腐蚀磨损。

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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.