论文标题
分段模型具有两个重叠阶段的结构形成，并在严重的塑性变形后硬化
Piecewise model with two overlapped stages for the structure formation and hardening upon severe plastic deformation
论文作者
论文摘要
在严重的塑性变形（SPD）时，金属微/纳米结构的演变仍然可以从理论上解释，而实验数据集则持续增长。与了解SPD的理解相关的主要问题是几个改变材料结构的竞争过程的协同作用。在本文中，我们提出了一个模型，以揭示自由拟合参数的应变断裂点，其中主要是一种机制从材料硬度与真实应变实验数据中确定SPD材料中的微/纳米结构。该模型用于分析纯多晶铁的SPD数据，并揭示了两个独特的应变断裂点。
The evolution of metals micro/nano-structure upon severe plastic deformation (SPD) is still far to be theoretically explained, while experimental datasets are persistently growing. Major problem associated with understanding of SPD is a synergetic effect of several competing processes which alter material structure. In this paper we propose a model to reveal, as free-fitting parameters, strain breakpoints where predominantly one mechanism determines the micro/nano-structure in SPD materials from material hardness vs true strain experimental data. The model is applied to analyse SPD data for pure polycrystalline iron and two distinctive strain breakpoints have been revealed.
