TY - JOUR
T1 - Electrosynthesis and Evaluation of Homogeneous CoCrNi Medium-Entropy Alloys for Structural Applications
AU - Pang, Zhongya
AU - Zhang, Xueqiang
AU - Hu, Conghui
AU - Li, Jinjian
AU - Tian, Feng
AU - Li, Guangshi
AU - Xiong, Xiaolu
AU - Chen, Chaoyi
AU - Xu, Qian
AU - Zhou, Zhongfu
AU - Lu, Xionggang
AU - Zou, Xingli
N1 - Publisher Copyright:
© 2023, The Minerals, Metals & Materials Society and ASM International.
PY - 2023/10
Y1 - 2023/10
N2 - Medium-entropy alloys (MEAs) have received increasing attention for various applications due to their excellent properties. This work demonstrates a facile electrolysis method to directly prepare homogeneous CoCrNi MEAs from mixed metal oxide precursors in molten CaCl2. The obtained CoCrNi MEAs with typical face-centered cubic structure show nodular particle morphology. The influences of electrolytic parameters on the cathodic samples were investigated, and the results show that tunable phase composition and particle size of the samples can be achieved by controlling the electrolysis time and temperature. The electrolytic intermediate samples have been systematically characterized and analyzed, and the electrochemical synthesis mechanism of CoCrNi MEAs has been proposed, which typically involves electrochemical deoxidation and in-situ alloying processes. Additionally, the electrochemically synthesized CoCrNi MEAs has been processed into bulk CoCrNi MEAs to further investigate and evaluate their mechanical properties for possible structural applications. The as-synthesized CoCrNi MEA shows the comparable yield strength, tensile strength, fracture elongation, and hardness of 994 MPa, 1183 MPa, 14 pct, and 412 Hv, respectively, exhibiting an excellent engineering strength-ductility combination.
AB - Medium-entropy alloys (MEAs) have received increasing attention for various applications due to their excellent properties. This work demonstrates a facile electrolysis method to directly prepare homogeneous CoCrNi MEAs from mixed metal oxide precursors in molten CaCl2. The obtained CoCrNi MEAs with typical face-centered cubic structure show nodular particle morphology. The influences of electrolytic parameters on the cathodic samples were investigated, and the results show that tunable phase composition and particle size of the samples can be achieved by controlling the electrolysis time and temperature. The electrolytic intermediate samples have been systematically characterized and analyzed, and the electrochemical synthesis mechanism of CoCrNi MEAs has been proposed, which typically involves electrochemical deoxidation and in-situ alloying processes. Additionally, the electrochemically synthesized CoCrNi MEAs has been processed into bulk CoCrNi MEAs to further investigate and evaluate their mechanical properties for possible structural applications. The as-synthesized CoCrNi MEA shows the comparable yield strength, tensile strength, fracture elongation, and hardness of 994 MPa, 1183 MPa, 14 pct, and 412 Hv, respectively, exhibiting an excellent engineering strength-ductility combination.
UR - https://www.scopus.com/pages/publications/85166620437
U2 - 10.1007/s11663-023-02877-3
DO - 10.1007/s11663-023-02877-3
M3 - Article
AN - SCOPUS:85166620437
SN - 1073-5615
VL - 54
SP - 2824
EP - 2839
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
IS - 5
ER -