Orowan strengthening and forest hardening superposition examined by dislocation dynamics simulations
Orowan strengthening and forest hardening superposition examined by dislocation dynamics simulations
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DOI：
10.1016/j.actamat.2010.06.028
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发表时间：
2010-10-01
期刊：
影响因子：
9.4
通讯作者：
Devincre, Benoit
中科院分区：
文献类型：
--
作者：
Queyreau, Sylvain;Monnet, Ghiath;Devincre, Benoit
混合规律是涉及多种应变硬化机制的复杂材料塑性变形建模的一个重要特征。在这项工作中，使用位错动力学模拟来表征个体和两种主要晶体塑性机制的叠加贡献，即Orowan强化和森林硬化。在对每种硬化机制进行形式化描述的基础上，有证据表明，混合的二次规则能够定量预测复杂材料（如反应堆压力容器钢）的流动应力。(C) 2010材料学报Elsevier Ltd.出版。版权所有。
Rule of mixtures are an essential feature of the modeling of plastic deformation in complex materials in which more than one strain-hardening mechanism is involved. In this work, use is made of dislocation dynamics simulations to characterize the individual and the superposed contributions of two major mechanisms of crystal plasticity, i.e. Orowan strengthening and forest hardening. Based on a formal description of each hardening mechanism, evidence is presented to show that a quadratic rule of mixtures has the ability to predict quantitatively the flow stress of complex materials such as reactor pressure vessel steel. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.