|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Modeling Microstructural Evolution in Neutron Irradiated Tungsten during Isochronal Annealing Process
||Xunxiang Hu, Donghua Xu, Brian Wirth, Yutai Katoh
|On-Site Speaker (Planned)
Tungsten plasma facing components (PFCs) in fusion reactors will experience an extreme environment including high temperature and thermal flux, and intense radiation. Significant defect accumulations and the resulting degradation of thermo-mechanical properties are expected for tungsten during and after exposure to intense radiation. In this study, a diffusion-reaction cluster dynamics model based on rate theory was applied to depcit the distribution of vacancy and interstitial clusters in tungsten following low temperature (90°C) and low dose (0.03dpa) neutron irradiation. With respect to the experimental data used to validate the developed model, high purity (110) single crystalline tungsten was examined by positron annihilation spectroscopy (PAS) and transmission electron microscopy (TEM) following neutron irradiation and subsequent isochronal annealing. The data from microstructural observation of the studied tungsten were used to validate the developed model as well as the kinetics and energetics parameters describing defect interactions in tungsten obtained from atomistic simulations.
||Planned: A print-only volume