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Volume 12
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10.3390/met12101590
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Article

Microstructure and Properties of Laser Surface Remelting AlCoCrFeNi2.1 High-Entropy Alloy

by
Jingrun Chen
1,
Jing Zhang
1,*,
Ke Li
1,
Dongdong Zhuang
2,
Qianhao Zang
3,
Hongmei Chen
3,
Yandi Lu
4,
Bo Xu
4 and
Yan Zhang
1
1
School of Metallurgy and Materials Engineering, Jiangsu University of Science and Technology, Suzhou 215600, China
2
School of Materials Science and Technology, Jiangsu University, Zhenjiang 212013, China
3
School of Materials Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
4
Suzhou Institute of Technology, Jiangsu University of Science and Technology, Suzhou 215600, China
*
Author to whom correspondence should be addressed.
Metals 2022, 12(10), 1590; https://doi.org/10.3390/met12101590
Submission received: 31 August 2022 / Revised: 22 September 2022 / Accepted: 22 September 2022 / Published: 24 September 2022
(This article belongs to the Special Issue Mechanical Failure and Metal Degradation of Ships and Marine Structures)
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Abstract

In this study, laser surface remelting of an AlCoCrFeNi2.1 high-entropy alloy was performed using a Yb:YAG laser. The effects of laser surface remelting on the phase structure, microstructure, Vickers hardness, frictional wear properties, and corrosion resistance of the high-entropy alloy were investigated. The remelted layer of the AlCoCrFeNi2.1 high-entropy alloy was produced by remelting at 750 W laser power and formed a good metallurgical bond with the substrate. The X-ray diffraction results showed that the 750 W remelted layer consisted of face-centered cubic and body-centered cubic phases, which were consistent with the phases of the as-cast AlCoCrFeNi2.1 high-entropy alloy, and a new phase was not generated within the remelted layer. Laser surface remelting is very effective in refining the lamellar structure, and the 750 W remelted layer shows a finer lamellar structure compared to the matrix. The surface hardness and wear resistance of the AlCoCrFeNi2.1 high-entropy alloy were substantially improved after laser surface remelting. In a 3.5 wt.% NaCl solution, the laser-remelted surface had a larger self-corrosion potential and smaller self-corrosion current density, and the corrosion resistance was better than that of the as-cast high-entropy alloy.
Keywords: AlCoCrFeNi2.1 high-entropy alloy; laser surface remelting; microstructure; wear resistance properties; corrosion resistance properties AlCoCrFeNi2.1 high-entropy alloy; laser surface remelting; microstructure; wear resistance properties; corrosion resistance properties

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MDPI and ACS Style

Chen, J.; Zhang, J.; Li, K.; Zhuang, D.; Zang, Q.; Chen, H.; Lu, Y.; Xu, B.; Zhang, Y. Microstructure and Properties of Laser Surface Remelting AlCoCrFeNi2.1 High-Entropy Alloy. Metals 2022, 12, 1590. https://doi.org/10.3390/met12101590

AMA Style

Chen J, Zhang J, Li K, Zhuang D, Zang Q, Chen H, Lu Y, Xu B, Zhang Y. Microstructure and Properties of Laser Surface Remelting AlCoCrFeNi2.1 High-Entropy Alloy. Metals. 2022; 12(10):1590. https://doi.org/10.3390/met12101590

Chicago/Turabian Style

Chen, Jingrun, Jing Zhang, Ke Li, Dongdong Zhuang, Qianhao Zang, Hongmei Chen, Yandi Lu, Bo Xu, and Yan Zhang. 2022. "Microstructure and Properties of Laser Surface Remelting AlCoCrFeNi2.1 High-Entropy Alloy" Metals 12, no. 10: 1590. https://doi.org/10.3390/met12101590

APA Style

Chen, J., Zhang, J., Li, K., Zhuang, D., Zang, Q., Chen, H., Lu, Y., Xu, B., & Zhang, Y. (2022). Microstructure and Properties of Laser Surface Remelting AlCoCrFeNi2.1 High-Entropy Alloy. Metals, 12(10), 1590. https://doi.org/10.3390/met12101590

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