A quantitative model of grain refinement and strain hardening during severe plastic deformation
A quantitative model of grain refinement and strain hardening during severe plastic deformation
复制标题
严重塑性变形过程中晶粒细化和应变硬化的定量模型
DOI：
10.1016/j.msea.2006.08.076
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发表时间：
2007
期刊：
影响因子：
6.4
通讯作者：
S. Stupkiewicz
中科院分区：
文献类型：
--
作者：
H. Petryk;S. Stupkiewicz
定量研究了剧烈塑性变形 (SPD) 对多晶金属晶粒细化和应变硬化的影响。位错单元和单元块尺寸的减小表示为受应变率反转影响的有效塑性应变的函数。高角度边界面积分数的估计增长取决于三维变形路径的复杂性。位错和边界强化引起的应变硬化用微观结构参数来描述，并纳入有限应变塑性的连续介质力学框架中。所提出的模型为不同 SPD 过程的定量比较提供了工具。计算了纯铝通过等通道角挤压（ECAP）和循环挤压-压缩变形行为的模拟实例。
The effect of severe plastic deformation (SPD) on grain refinement and strain hardening in polycrystalline metals is studied quantitatively. The decrease in size of dislocation cells and cell-blocks is expressed as a function of the effective plastic strain influenced by strain-rate reversals. The estimated growth of the high-angle boundary area fraction depends on the complexity of the three-dimensional deformation path. The strain hardening due to both dislocation and boundary strengthening is described in terms of microstructural parameters and incorporated in the continuum mechanics framework of finite strain plasticity. The proposed model provides a tool for quantitative comparison of different SPD processes. Examples of simulation of the behaviour of pure aluminium deformed by equal channel angular pressing (ECAP) and cyclic extrusion–compression are calculated.
影响因子：
9.4
作者：
K. Furuno;Hiroki Akamatsu;K. Oh-ishi;M. Furukawa;Z. Horita;T. Langdon
通讯作者：
K. Furuno;Hiroki Akamatsu;K. Oh-ishi;M. Furukawa;Z. Horita;T. Langdon