Abstract Based on our analysis, the grain size effect in the most widely used models such as the Kocks–Mecking–Estrin (KME) model cannot account for the work hardening behaviors of nano-crystalline or ultrafine-crystalline metals processed by severe plastic deformation (SPD). By considering the material's initial state, this study provides a consistent interpretation of their work hardening behaviors in terms of the evolution of microstructural features and the mechanical properties.

中文翻译：

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严重塑性变形加工金属的晶粒尺寸相关加工硬化行为

摘要 根据我们的分析，Kocks-Mecking-Estrin (KME) 模型等最广泛使用的模型中的晶粒尺寸效应无法解释通过剧烈塑性变形加工的纳米晶或超细晶金属的加工硬化行为。 SPD）。通过考虑材料的初始状态，本研究在微观结构特征和机械性能的演变方面对其加工硬化行为提供了一致的解释。