Effects of applied strain on radiation damage generation in body centered cubic iron
Effects of applied strain on radiation damage generation in body centered cubic iron
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DOI：
10.1016/j.jnucmat.2014.12.111
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发表时间：
2015-04-01
影响因子：
3.1
通讯作者：
Gronbech-Jensen, Niels
中科院分区：
文献类型：
--
作者：
Beeler, Benjamin;Asta, Mark;Gronbech-Jensen, Niels
通过计算机模拟研究了体心立方（BCC）铁的辐射损伤，量化了温度、撞击粒子能量和外来粒子的存在对辐射损伤的影响。然而，对机械应力和应变的影响进行了有限的研究。在反应堆环境中，结构材料经常受到机械应变的影响，进一步了解这种应变如何影响缺陷的产生，对于预测这种条件下的微观结构演变和损伤积累可能很重要。在这项研究中，我们进行了分子动力学模拟，其中不同类型的均匀菌株应用于BCC Fe，并研究了对缺陷产生的影响。发现体积守恒的剪切应变在BCC Fe中通过级联产生的稳定缺陷数量上没有统计学上的显著变化。然而，发现导致体积变化的应变对缺陷的产生产生重大影响。(C) 2015 Elsevier B.V.版权所有
Radiation damage in body-centered cubic (BCC) Fe has been extensively studied by computer simulations to quantify effects of temperature, impinging particle energy, and the presence of extrinsic particles. However, limited investigation has been conducted into the effects of mechanical stresses and strain. In a reactor environment, structural materials are often mechanically strained, and an expanded understanding of how this strain affects the generation of defects may be important for predicting microstructural evolution and damage accumulation under such conditions. In this study, we have performed molecular dynamics simulations in which various types of homogeneous strains are applied to BCC Fe and the effect on defect generation is examined. It is found that volume-conserving shear strains yield no statistically significant variations in the stable number of defects created via cascades in BCC Fe. However, strains that result in volume changes are found to produce significant effects on defect generation. (C) 2015 Elsevier B.V. All rights reserved.