Langevin model for real-time Brownian dynamics of interacting nanodefects in irradiated metals

Article

关键词: GLISSILE INTERSTITIAL CLUSTERS;    HEAVY-ION IRRADIATIONS;    KINETIC MONTE-CARLO;    DISLOCATION LOOPS;    MOLECULAR-DYNAMICS;    COMPUTER-SIMULATION;    DAMAGE EVOLUTION;    HIGH-TEMPERATURE;    ALPHA-IRON;    ELASTIC INTERACTION;   

DOI  :  10.1103/PhysRevB.81.224107

来源: SCIE

【 摘 要 】

In situ real-time electron microscope observations of metals irradiated with ultrahigh-energy electrons or energetic ions show that the dynamics of microstructural evolution in these materials is strongly influenced by long-range elastic interactions between mobile nanoscale radiation defects. Treating long-range interactions is also necessary for modeling microstructures formed in ex situ high-dose-rate ion-beam irradiation experiments, and for interpolating the ion-beam irradiation data to the low-dose-rate limit characterizing the neutron irradiation environments of fission or fusion power plants. We show that simulations, performed using an algorithm where nanoscale radiation defects are treated as interacting Langevin particles, are able to match and explain the real-time dynamics of nanodefects observed in in situ electron microscope experiments.

【 授权许可】

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