An Atomistic Modeling Study of the Relationship between Critical Resolved Shear Stress and Atomic Structure Distortion in FCC High Entropy Alloys : Relationship in Random Solid Solution and Chemical-Short-Range-Order Alloys

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  • Ali Md. Lokman
    Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University Department of Physics, Pabna University of Science and Technology
  • Shinzato Shuhei
    Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University
  • Wang Vei
    Department of Applied Physics, Xi’an University of Technology
  • Shen Zeqi
    Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University
  • Du Jun-ping
    Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University Center for the Element Strategy Initiative for Structural Materials (ESISM), Kyoto University
  • Ogata Shigenobu
    Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University Center for the Element Strategy Initiative for Structural Materials (ESISM), Kyoto University

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  • An Atomistic Modeling Study of the Relationship between Critical Resolved Shear Stress and Atomic Structure Distortion in FCC High Entropy Alloys — Relationship in Random Solid Solution and Chemical-Short-Range-Order Alloys —

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<p>The relationship between the critical resolved shear stress (CRSS) at T = 0 K and the atomic structure distortion was studied using molecular dynamics (MD) simulation with atomic distortion (root-mean-square-atomic-displacement (RMSAD)) controlled Lennard-Jones (LJ) interatomic potentials for different face-centered-cubic (FCC) high entropy alloy (HEA) systems, such as ternary, quaternary, and quinary alloy systems. We demonstrated that an almost universal linear relationship exists between CRSS and RMSAD for the random solid solution (RSS) of these alloy systems. The universality was also confirmed by a more realistic embedded atom method (EAM) potential. However, alloy systems that have a chemical-short-range-order (CSRO) do not follow this universal linear relationship.</p>

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 61 (4), 605-609, 2020-04-01

    公益社団法人 日本金属学会

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