Phase, Microstructure and Corrosion Behaviour of Al0.3FeCoNiCrx High-Entropy Alloys via Cr Addition

Chen, Mengyao; Shen, Haicheng; Wen, Cheng; Wang, Nanchuan; Tian, Yuwan; Zhong, Weihua; Huang, Haiyou

doi:10.3390/ma17215259

Open AccessArticle

Phase, Microstructure and Corrosion Behaviour of Al_0.3FeCoNiCr_x High-Entropy Alloys via Cr Addition

by

Mengyao Chen

^1,†,

Haicheng Shen

^2,†,

Cheng Wen

^2,3,*

,

Nanchuan Wang

²,

Yuwan Tian

^2,3,

Weihua Zhong

¹ and

Haiyou Huang

⁴

¹

China Institute of Atomic Energy, Beijing 102413, China

²

College of Mechanical Engineering, Guangdong Ocean University, Zhanjiang 524000, China

³

Zhanjiang Key Laboratory of Corrosion and Protection for Ocean Engineering and Equipment, Guangdong Ocean University, Zhanjiang 524000, China

⁴

Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China

^*

Author to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Materials 2024, 17(21), 5259; https://doi.org/10.3390/ma17215259

Submission received: 1 October 2024 / Revised: 16 October 2024 / Accepted: 23 October 2024 / Published: 29 October 2024

(This article belongs to the Special Issue Corrosion Behavior and Mechanical Properties of Metallic Materials)

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Abstract

The microstructure evolution of Al_0.3FeCoNiCr_x (x = 0, 0.3, 0.5, 1, 1.5) high-entropy alloys (HEAs) were studied using X-Ray diffraction technique and scanning electron microscope equipped with energy dispersive spectrometer. The short-term and long-term corrosion behaviours of these alloys in 3.5 wt.% NaCl solution were studied by electrochemical impedance spectroscopy, potentiodynamic polarisation measurement, immersion test and corrosion morphology analysis. The results show that all the designed HEAs present single-phase FCC structure, and the increase in Cr content changes the microstructural morphology from cellular to a typical dendritic–interdendritic state. Without the influence of phase transformation, the corrosion resistance of Al_0.3FeCoNiCr_x HEAs gradually increases with the increase in Cr content. Our designed alloys exhibit excellent corrosion resistance compared to the existing HEAs in the AlFeCoNiCr composition system.

Keywords: AlFeCoNiCr high-entropy alloy; corrosion; Cr effect; microstructure

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MDPI and ACS Style

Chen, M.; Shen, H.; Wen, C.; Wang, N.; Tian, Y.; Zhong, W.; Huang, H. Phase, Microstructure and Corrosion Behaviour of Al_0.3FeCoNiCr_x High-Entropy Alloys via Cr Addition. Materials 2024, 17, 5259. https://doi.org/10.3390/ma17215259

AMA Style

Chen M, Shen H, Wen C, Wang N, Tian Y, Zhong W, Huang H. Phase, Microstructure and Corrosion Behaviour of Al_0.3FeCoNiCr_x High-Entropy Alloys via Cr Addition. Materials. 2024; 17(21):5259. https://doi.org/10.3390/ma17215259

Chicago/Turabian Style

Chen, Mengyao, Haicheng Shen, Cheng Wen, Nanchuan Wang, Yuwan Tian, Weihua Zhong, and Haiyou Huang. 2024. "Phase, Microstructure and Corrosion Behaviour of Al_0.3FeCoNiCr_x High-Entropy Alloys via Cr Addition" Materials 17, no. 21: 5259. https://doi.org/10.3390/ma17215259

APA Style

Chen, M., Shen, H., Wen, C., Wang, N., Tian, Y., Zhong, W., & Huang, H. (2024). Phase, Microstructure and Corrosion Behaviour of Al_0.3FeCoNiCr_x High-Entropy Alloys via Cr Addition. Materials, 17(21), 5259. https://doi.org/10.3390/ma17215259

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Phase, Microstructure and Corrosion Behaviour of Al_0.3FeCoNiCr_x High-Entropy Alloys via Cr Addition

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