Radiation damage in nano-crystalline tungsten: A molecular dynamics simulation

• Published in: Metals and materials international Vol. 15; no. 3; pp. 447 - 452
• Main Authors: Park, Na-Young, Cha, Pil-Ryung, Kim, Yu-Chan, Seok, Hyun-Kwang, Han, Seung-Hee, Lee, Seung-Cheol, Cho, Seungyon, Jung, Hyejin
• Format: Journal Article
• Language: English
• Published: Springer The Korean Institute of Metals and Materials 01.06.2009; Springer Nature B.V; 대한금속·재료학회
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Computer simulation; Construction; Crystal structure; Engineering Thermodynamics; Genetic recombination; Heat and Mass Transfer; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Nanocomposites; Nanocrystals; Nanomaterials; Nanostructure; Processes; Radiation; Radiation damage; Solid Mechanics; Tungsten; 재료공학; nano-crystalline tungsten; molecular dynamics; radiation damage
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-009-0447-3

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.