High-temperature tribological properties of Fe40Mn20Cr20Ni20 high-entropy alloys with composition gradient coating after solid aluminizing

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2025-02-01 Epub Date: 2024-12-31 DOI:10.1016/j.surfcoat.2024.131721

Fan Li , Xi Jin , Xuejiao Wang , Huijun Yang , Junwei Qiao

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Abstract

Wear is one of the main ways of energy consumption in manufacturing industry. Improving the surface properties of the alloy can effectively improve this consumption. In this study, hot-rolled Fe₄₀Mn₂₀Cr₂₀Ni₂₀ HEA with FCC structure was aluminized by pack cementation method to form a multi-layer gradient coating with aluminized layer of 52 μm and interdiffusion layer of 21 μm. The microstructure, mechanical properties, growth kinetics and high temperature friction properties of the aluminized layer were analyzed. The hardness of aluminized HEA is higher than that of hot-rolled HEA, and the wear rate is very low at room temperature. With the increase of the temperature, the COF of hot-rolled HEA decreases gradually, yet the COF of aluminized HEA increases first and then decreases. At different temperatures, the wear mechanism of hot-rolled HEA is mainly adhesive wear, oxidation wear and abrasive wear. The wear mechanism of aluminized HEA is mainly abrasive wear, delamination wear and adhesive wear.

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固体渗铝后成分梯度涂层Fe40Mn20Cr20Ni20高熵合金的高温摩擦学性能

磨损是制造业能耗的主要方式之一。改善合金的表面性能可以有效地改善这种消耗。本研究对FCC结构的热轧Fe40Mn20Cr20Ni20 HEA采用包层渗铝的方法进行了渗铝处理，形成了渗铝层为52 μm、互扩散层为21 μm的多层梯度涂层。分析了渗铝层的显微组织、力学性能、生长动力学和高温摩擦性能。镀铝HEA的硬度高于热轧HEA，室温下的磨损率很低。随着温度的升高，热轧HEA的COF逐渐减小，而镀铝HEA的COF先增大后减小。在不同温度下，热轧HEA的磨损机制主要为黏着磨损、氧化磨损和磨粒磨损。渗铝HEA的磨损机制主要是磨粒磨损、分层磨损和粘着磨损。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.