Microstructure and wear properties of TiN–Al2O3–Cr2B multiphase ceramics in-situ reinforced CoCrFeMnNi high-entropy alloy coating

The FeCoCrNiBx high-entropy alloy (HEA) coatings with three different boron (B) contents were synthesized on Q245R steel (American grade: SA515 Gr60) by laser cladding deposition technology. Effects of B content on the microstructure and wear properties of FeCoCrNiBx HEA coating were investigated. In this study, the phase composition, microstructure, micro-hardness, and wear resistance (rolling friction) were investigated by X-ray diffraction (XRD), a scanning electron microscope (SEM), a micro hardness tester, and a roller friction wear tester, respectively. The FeCoCrNiBx coatings exhibited a typical dendritic and interdendritic structure, and the microstructure was refined with the increase of B content. Additionally, the coatings were found to be a simple face-centered cubic (FCC) solid solution with borides. In terms of mechanical properties, the hardness and wear resistance ability of the coating can be enhanced with the increase of the B content, and the maximum hardness value of three HEA coatings reached around 1025 HV0.2, which is higher than the hardness of the substrate material. It is suggested that the present fabricated HEA coatings possess potentials in application of wear resistance structures for Q245R steel.

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Microstructure and Wear Properties of Mechanically Alloyed Powder Al xMo 0.5NBFeTiMn 2 High Entropy Alloy Coating by Laser Cladding

SSRN Electronic Journal ◽

10.2139/ssrn.3567356 ◽

2020 ◽

Author(s):

Zhen Gu ◽

Pu Mao ◽

Shengqi Xi

Keyword(s):

Laser Cladding ◽

Alloy Coating ◽

High Entropy Alloy ◽

Alloyed Powder ◽

Wear Properties ◽

Mechanically Alloyed ◽

High Entropy

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In-situ Reactive Synthesis and Characterization of a High Entropy Alloy Coating by Laser Metal Deposition

International Journal of Lightweight Materials and Manufacture ◽

10.1016/j.ijlmm.2021.09.002 ◽

2021 ◽

Author(s):

M. Dada ◽

P. Popoola ◽

N. Mathe ◽

S. Pityana ◽

S. Adeosun

Keyword(s):

Alloy Coating ◽

Metal Deposition ◽

Synthesis And Characterization ◽

High Entropy Alloy ◽

Laser Metal Deposition ◽

Reactive Synthesis ◽

High Entropy

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In Situ Laser Synthesis of High Entropy Alloy Coating on Ti-6Al-4V Alloy: Characterization of Microstructure and Properties

Materials Science Forum ◽

10.4028/www.scientific.net/msf.898.643 ◽

2017 ◽

Vol 898 ◽

pp. 643-650 ◽

Cited By ~ 2

Author(s):

Zhao Bing Cai ◽

Xue Jia Pang ◽

Xiu Fang Cui ◽

Xin Wen ◽

Zhe Liu ◽

...

Keyword(s):

Wear Resistance ◽

Corrosion Resistance ◽

Room Temperature ◽

Adhesive Wear ◽

Alloy Coating ◽

High Entropy Alloy ◽

Micro Hardness ◽

High Entropy

In order to improve the surface properties of Ti-6Al-4V, high-entropy alloy coatings were prepared by in-situ laser cladding on the surface of Ti-6Al-4V substrate. The microstructure, micro-hardness, corrosion resistance and wear resistance were investigated. The results showed that the high-entropy alloy coating was composed of BCC high-entropy alloy phase, α-Ti phase and (Ni, Co)Ti2 phase. The micro-hardness of the high-entropy alloy coatings is much higher than that of Ti-6Al-4V substrate. The coating also has a better corrosion resistance than Ti-6Al-4V substrate, even superior to 304SS in 3.5wt.% NaCl solution at room temperature. Compared with Ti-6Al-4V substrate, the high-entropy alloy coating has a greater wear resistance with the wear mass loss decreased 28.2% and 23.1%, respectively. Wear patterns of Ti-6Al-4V substrate and high-entropy alloy coatings are the coexistence of adhesive wear and abrasive wear, but the wear degree of high-entropy alloy coatings is lower.

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