Continuum crystal plasticity models based on the kinematics of plastic slip are widely developed and used in recent years to describe the anisotropic elasto-viscoplastic behaviour of metallic material. Various microstructural physical-based models have been proposed to reproduce experimental evolutions. This work aims to analyse and compare different crystal plasticity finite element models, especially those based on dislocation densities, from the simulations of stress–strain curves of a nickel base super alloy CMSX-4. Special attention is paid on hardening matrix. The adequacy between the simulated results and experimental data is commented, and it is found that a strain-rate- dependent double hardening matrix model can give a better prediction of the CMSX-4 behaviours.

基于塑性滑移运动学的连续谱晶体可塑性模型得到了广泛的发展，近年来被用于描述金属材料的各向异性弹黏塑性行为。已经提出了各种基于微观结构的物理模型来重现实验发展。这项工作旨在通过对镍基超级合金CMSX-4的应力-应变曲线进行仿真来分析和比较不同的晶体可塑性有限元模型，尤其是基于位错密度的模型。要特别注意硬化矩阵。评论了仿真结果和实验数据之间的充分性，发现应变率相关的双重硬化矩阵模型可以更好地预测CMSX-4行为。