Observation of low friction and high wear resistance in the ductile VNbTa refractory medium-entropy alloy at 800 °C

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2024-09-20 DOI:10.1016/j.intermet.2024.108497

Qi Wei , Aijun Zhang , Benbin Xin , Jiesheng Han , Bo Su , Xiaochao Wang , Junhu Meng

引用次数: 0

Abstract

VNbTa refractory medium-entropy alloy (RMEA) with extraordinary strength-ductility synergy and rolling formability was deemed as an ideal structural material suitable for industrial applications, whereas the tribological performance has been still unclear. Therefore, this work employed a ball-on-disc tribometer to evaluate friction and wear properties of VNbTa alloy at various temperatures. It was surprisingly found that, at 800 °C, the alloy exhibits exceptional tribological performance with the coefficient of friction (COF) of 0.13 and wear rate of 3.9 × 10⁻⁶ mm³/Nm. Our results indicated that the mild friction and wear at 800 °C are mainly attributed to the durable lubrication of in-situ molten V₂O₅ as well as good load-bearing capacity of hard oxide scale.

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观察 800 °C 下韧性 VNbTa 中熵难熔合金的低摩擦性和高耐磨性

钒铌钽难熔中熵合金（RMEA）具有非凡的强度-韧性协同作用和轧制成形性，被认为是一种适合工业应用的理想结构材料，但其摩擦学性能仍不明确。因此，这项研究采用了球盘摩擦仪来评估 VNbTa 合金在不同温度下的摩擦和磨损性能。结果令人惊讶地发现，在 800 °C 时，该合金表现出优异的摩擦学性能，摩擦系数（COF）为 0.13，磨损率为 3.9 × 10-6 mm3/Nm。我们的研究结果表明，800 ℃ 时的轻微摩擦和磨损主要归因于原位熔融 V2O5 的持久润滑以及硬氧化物鳞片的良好承载能力。

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

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.