Modelling of irradiation-induced hardening in metals using dislocation dynamics
Modelling of irradiation-induced hardening in metals using dislocation dynamics
复制标题
使用位错动力学模拟金属中的辐照诱导硬化
DOI：
10.1080/09500830110069297
复制
发表时间：
2001
影响因子：
1.2
通讯作者：
M. Victoria
中科院分区：
文献类型：
--
作者：
T. Khraishi;H. Zbib;T. D. de la Rubia;M. Victoria
报道了一种新的模拟技术(三维位错动力学)，它能够捕捉到金属中由于辐照而产生的硬化效应。当被高能粒子轰击时，金属会产生内部损伤。例如，在受辐射的PD中，损伤以间质环的形式出现。这种环是纳米大小的，通常具有很高的数字密度。从位错理论出发，给出了环的应力场。结果表明，这种硬化是由于滑移位错与大量空间分散的间隙环的弹性相互作用造成的。结果发现与实验有很好的相关性。
A new simulation technique (three-dimensional dislocation dynamics) enabling the capture of a hardening effect in metals due to irradiation is reported. When bombarded with high-energy particles, metals accrue internal damage. In irradiated Pd, for example, damage takes the form of interstitial loops. Such loops are nano-sized and typically have a high number density. The stress field of a loop is given from dislocation theory. It is shown here the hardening is due to the elastic interaction of gliding dislocations with a high number of spatially dispersed interstitial loops. Results are found to correlate well with experiments.