关键词: 关键词：晶体塑性有限元模型, 高熵合金, 析出相, 织构, 动态压缩

Abstract: Based on the Crystal Plasticity Finite Element (CPFEM) framework, a modeling method for describing the mechanical behavior of CoCrNiSi_0.3C_0.048 medium entropy alloy with three-stage precipitated phase structure under dynamic compression was constructed. Under the loading condition of 3000 s^-1 strain rate, the effects of different initial textures such as random, Gaussian, rotating Gaussian, cubic, copper, and brass on the stress-strain response were studied. The results show that the random texture and copper texture exhibit higher yield strength and excellent plastic deformation ability under dynamic compression, while the comprehensive performance of the cube texture is relatively poor. At high strain rate, the precipitated phase significantly affects the strengthening effect of the material. Through the comprehensive analysis of yield strength, plastic deformation ability and hardening behavior, the influence of different initial textures on deformation at high strain rate is revealed, which provides a scientific basis for the optimization design and practical application of high entropy alloys containing precipitated phases.

Key words: crystal plastic finite element model, high entropy alloy, precipitation, texture, dynamic compression