Peculiarities of chemical element redistribution near free surfaces in CoCrFeMnNi high-entropy alloys

International Scientific and Technical Youth Conference "Perspective Materials of Constructional and Medical Purpose"

材料科学;医药卫生

Korchuganov, A.V.^1 ; Lucenko, I.S.^1

Institute of Strength Physics and Material Science, Siberian Branch of the Russian Academy of Sciences, 2/4 Akademicheskii ave., Tomsk

634055, Russia^1

关键词: Crystallographic orientations;    Elastic limit;    Free surfaces;    Mechanical characteristics;    Stoichiometric compositions;    Uniaxial tensions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/511/1/012024/pdf
DOI  :  10.1088/1757-899X/511/1/012024

来源: IOP

【 摘 要 】

Based on molecular dynamics and Monte Carlo simulation, the distribution of chemical elements near free surfaces of various crystallographic orientations in high-entropy CoCrFeMnNi alloys was investigated. It is shown that for studied stoichiometric compositions of the alloy it has a different character and differently affects the mechanical characteristics and the defect structure of alloys subjected to uniaxial tension. This is due to the different influence of each element on the elastic modulus of the alloy. Segregation has a greater effect on the Young's modulus and elastic limit for Co30Cr30Fe10Mn10Ni20, while the resulting defect structures have more differences for Co10Cr10Fe30Mn30Ni20.