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Volume 54 Issue 8
Aug.  2022
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Yan A’min, Qiao Yu, Dai Lanhong. Formation and stability of shaped charge liner jet of CrMnFeCoNi high-entropy alloy. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(8): 2119-2130. DOI: 10.6052/0459-1879-22-274
Citation: Yan A’min, Qiao Yu, Dai Lanhong. Formation and stability of shaped charge liner jet of CrMnFeCoNi high-entropy alloy. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(8): 2119-2130. DOI: 10.6052/0459-1879-22-274
shu

FORMATION AND STABILITY OF SHAPED CHARGE LINER JET OF CrMnFeCoNi HIGH-ENTROPY ALLOY

  • State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

  • School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

  • Received Date: June 16, 2022
  • Accepted Date: July 22, 2022
  • Available Online: July 23, 2022
    Graphical Abstract
    • Abstract
  • Recently emerging multi-principal component high-entropy alloy is expected to replace copper as a new generation of shaped charge liner material due to its wide composition/property control range and a series of excellent mechanical properties. Based on the experiments and numerical simulation of dynamic mechanical properties of five-element CrMnFeCoNi high-entropy alloy, the feasibility of this alloy as a shaped charge liner is explored. The mechanical behavior of high-entropy alloys at different strain rates and temperatures was studied via split Hopkinson tensile bar (SHTB) and material testing machine, and a Johnson-Cook thermal viscoplastic dynamic constitutive model of high-entropy alloys was established. The continuity condition of high-entropy alloy jet is explored based on the relationship between flow velocity and critical collapse angle. The continuity condition of high-entropy alloy jet is verified by finite element simulation, and the evolution law of high-speed tensile fracture of high-entropy alloy jet is further investigated. The results show that the jet break-up time is negatively correlated with the material tensile strength, and when the dynamic tensile strength increases, the jet break-up time will decrease. This work was provide references for the structural design of novel high-entropy alloy linev.
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    • References (45)
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