A Lightweight AlCrTiV0.5Cu x High-Entropy Alloy with Excellent Corrosion Resistance

Zhen Peng; Baowei Li; Zaibin Luo; Xuefei Chen; Yao Tang; Guannan Yang; Pan Gong

doi:10.3390/ma16072922

A Lightweight AlCrTiV_0.5Cu _x High-Entropy Alloy with Excellent Corrosion Resistance

Materials (Basel). 2023 Apr 6;16(7):2922. doi: 10.3390/ma16072922.

Authors

Zhen Peng¹, Baowei Li¹, Zaibin Luo¹, Xuefei Chen¹, Yao Tang², Guannan Yang³, Pan Gong⁴

Affiliations

¹ School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China.
² China Steel Development Research Institute, No.95 Longfusi Street, Dongcheng District, Beijing 100009, China.
³ State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China.
⁴ State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, China.

Abstract

Lightweight high-entropy alloys (HEAs) are a new class of low-density, high strength-to-weight ratio metallic structural material. Understanding their corrosion behavior is crucial for designing microstructures for their practical applications. This work investigates the electrochemical corrosion behavior of lightweight HEAs AlCrTiV_0.5Cu_x (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0) in a 0.6 M NaCl solution. These HEAs were produced by vacuum arc melting. In contrast to 304L stainless steel, all of the alloys exhibited lower current density levels caused by self-corrosion, with AlCrTiV_0.5 demonstrating the highest corrosion resistance (0.131 μA/cm²). Corrosion resistance decreased along with the content of copper because copper segregation accelerated local corrosion throughout the alloy.

Keywords: corrosion resistance; high entropy alloys; lightweight; microstructure.

Abstract

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