Wear response of laser remelted and aluminized CoFeNiCr0.5Mo0.1 medium entropy alloy

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-03-13 DOI:10.1016/j.surfcoat.2025.132040

Turgut Turan Yılmaz , Azmi Erdogan , Kadir Mert Doleker , Mohamed Kallel

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引用次数: 0

Abstract

In this study, mechanically alloyed and sintered CoFeNiCr_0.5Mo_0.1 alloys under pressure were also subjected to a laser melting process in order to improve their surface properties. In addition, these samples were thermochemically coated with a pack aluminizing process to provide hardness and wear resistance on the surface. While the produced alloys were predominantly composed of FCC phases, aluminide phases were formed on the surface after the aluminizing process. While approximately 10 % hardness increase was achieved with laser remelting, an increase of approximately 2 times was observed in the average hardness change after the aluminizing process. As a result of the aluminizing process, fracture toughness decreased and values were found as 2.78 and 4.49 MPa.m^1/2 for aluminized Aluminized MEA and Aluminized MEA + Laser. In order to examine the wear loss and friction coefficient, the samples were subjected to dry sliding wear tests and examined comparatively. It was observed that laser remelting improved wear resistance while aluminizing had a negative effect. When averaged for all loads, the wear coefficients were determined as 0.05 for MEA + Laser, 0.1 for MEA, 0.21 for Aluminized MEA + Laser and 0.26 10⁻³ × mm³/N.m for Aluminized MEA. Although the aluminizing process increased the surface hardness, it decreased the fracture toughness and increased the volume losses and friction coefficient.

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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.