Radiation damage in nano-crystalline tungsten: A molecular dynamics simulation
Park, NY (Park, Na-Young); Cha, PR (Cha, Pil-Ryung); Kim, YC (Kim, Yu-Chan); Seok, HK (Seok, Hyun-Kwang); Han, SH (Han, Seung-Hee); Lee, SC (Lee, Seung-Cheol); Cho, S (Cho, Seungyon); Jung, HJ (Jung, Hyejin)
METALS AND MATERIALS INTERNATIONAL, 15 (3): 447-452 JUN 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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