TY - JOUR
T1 - A novel L12-strengthened AlCoCuFeNi high-entropy alloy with both high hardness and good corrosion resistance
AU - Ren, Yaojia
AU - Wu, Hong
AU - Liu, Bin
AU - Shan, Quan
AU - Guo, Sheng
AU - Jiao, Zengbao
AU - Baker, Ian
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (52111530193 and 52020105013), Hunan Provincial Natural Science Foundation of China (2021JJ30846), and Hong Kong Research Grants Council (ECS 25202719 and GRF 15227121). Thanks to the Sinoma Institute of Materials Research (Guang Zhou) Co. Ltd. for their help in TEM characterization.
Funding Information:
This work was supported by the National Natural Science Foundation of China ( 52111530193 and 52020105013 ), Hunan Provincial Natural Science Foundation of China ( 2021JJ30846 ), and Hong Kong Research Grants Council ( ECS 25202719 and GRF 15227121 ). Thanks to the Sinoma Institute of Materials Research (Guang Zhou) Co., Ltd. for their help in TEM characterization.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1/15
Y1 - 2023/1/15
N2 - 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.
AB - 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.
KW - Corrosion resistance
KW - High entropy alloy
KW - Microstructure
KW - Nanomechanics
KW - Segregation
UR - http://www.scopus.com/inward/record.url?scp=85141271357&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2022.133339
DO - 10.1016/j.matlet.2022.133339
M3 - Journal article
AN - SCOPUS:85141271357
SN - 0167-577X
VL - 331
JO - Materials Letters
JF - Materials Letters
M1 - 133339
ER -