ABSTRACT 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.

中文翻译：

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不同晶体塑性有限元模型对镍合金模拟的比较

摘要 近年来，基于塑性滑移运动学的连续晶体塑性模型被广泛开发并用于描述金属材料的各向异性弹粘塑性行为。已经提出了各种基于微观结构的物理模型来重现实验演变。本工作旨在通过模拟镍基超级合金 CMSX-4 的应力-应变曲线，分析和比较不同的晶体塑性有限元模型，尤其是基于位错密度的模型。特别注意硬化基质。对模拟结果和实验数据之间的充分性进行了评论，发现应变率相关的双硬化矩阵模型可以更好地预测 CMSX-4 的行为。