Radiation damage in nano-crystalline tungsten: A molecular dynamics simulation
NY Park and PR Cha and YC Kim and HK Seok and SH Han and SC Lee and S Cho and HJ Jung, METALS AND MATERIALS INTERNATIONAL, 15, 447-452 (2009).
This study presents MD simulations for the radiation damage of single- and nano-(poly)crystalline tungsten. The nano-(poly)crystalline microstructure was constructed using a new construction method combined with the phase field model. At the maximum damage state, the recombination rate of self-interstitial atoms (SIAs) and vacancies is faster in the single-crystal that in the poly-crystal structure. In the steady state, the number of SIAs is twice as large in the nano-crystal, as caused by the attractive interaction between the grain boundary and the SIAs.
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