ABSTRACT A dislocation assisted self-consistent model based on Tandon and Weng approach and Bergstrom dynamic recovery model for particulate-reinforced composites has been extended to consider the matrix evolution during high-temperature deformation on flow stress. The impact of main influential processing parameters such as temperature, strain, and strain rate in addition to reinforcement characteristics, including particle size, and volume fraction, were successfully taken into account in the constitutive model. Moreover, the effect of particle fracture, diffusion relaxation around particles, dynamic recrystallization, and dynamic recovery of the matrix during deformation were precipitated as the softening factors in the presented model. It was found that the occurrence of particle stimulating nucleation mechanism can destroy the load transfer mechanism, which results in flow curve softening for a limited range of deformation conditions. It was shown that deformation mechanisms in single-phase alloy and metal matrix composite are the same, which are viscous glide and dislocation climb. GRAPHICAL ABSTRACT

中文翻译：

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颗粒金属基复合材料高温变形的位错辅助自洽本构模型

摘要 基于 Tandon 和 Weng 方法的位错辅助自洽模型和颗粒增强复合材料的 Bergstrom 动态恢复模型已经扩展到考虑高温变形​​过程中流变应力的基体演化。本构模型成功地考虑了主要有影响的加工参数（如温度、应变和应变率）以及增强特性（包括颗粒尺寸和体积分数）的影响。此外，颗粒断裂、颗粒周围的扩散松弛、动态再结晶和变形过程中基体的动态恢复的影响被沉淀为所提出模型中的软化因素。结果表明，粒子刺激成核机制的出现会破坏载荷传递机制，从而导致有限变形条件下的流动曲线软化。结果表明，单相合金与金属基复合材料的变形机制相同，均为粘性滑移和位错攀爬。图形概要