A novel L12-strengthened AlCoCuFeNi high-entropy alloy with both high hardness and good corrosion resistance
Journal article, 2023

In this work, a high hardness, crack-free AlCoCuFeNi high-entropy alloy with good corrosion resistance was successfully produced by spark plasma sintering at 1000℃ and 30 MPa for 10 min, followed by hot rolling to a thickness reduction of 10 % after holding at 600℃ for 30 min. The microstructure of the alloy was composed of fine equiaxed grains of (Fe, Co, Ni, Al)-enriched BCC, Cu-enriched FCC, nano-sized L12, and Al2O3 phases. The maximum texture index of the material is only 1.53, indicating a low anisotropy. The alloy possessed a high hardness (599 HV), a low friction coefficient (0.1), and a low corrosion current density (1.13 μA/cm2), implying both good wear and corrosion resistance. In addition, the creep mechanism was found to be grain boundary sliding.


Corrosion resistance

High entropy alloy




Yaojia Ren

Central South University

Hong Wu

Central South University

Bin Liu

Central South University

Quan Shan

Kunming University of Science and Technology

Sheng Guo

Chalmers, Industrial and Materials Science, Materials and manufacture

Z. B. Jiao

Hong Kong Polytechnic University

Ian Baker

Thayer School of Engineering at Dartmouth

Materials Letters

0167-577X (ISSN)

Vol. 331 133339

Subject Categories


Manufacturing, Surface and Joining Technology

Corrosion Engineering



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