Irradiation effect on mechanical properties of tungsten from molecular dynamic simulation

L Chen and LQ Li and HR Gong and JL Fan and W Li, MATERIALS LETTERS, 241, 27-30 (2019).

DOI: 10.1016/j.matlet.2019.01.043

Molecular dynamic simulation has been conducted to investigate the irradiation effects on mechanical properties of monocrystalline and nanocrystalline W samples. It is found that irradiation has quite different effects on mechanical properties of monocrystalline and nanocrystalline W, i.e., the ideal tensile strength of monocrystalline and nanocrystalline W decreases and increases with the increase of irradiation energy, respectively. In addition, nanocrystalline W with smaller nanoparticles possesses higher tensile strength under irradiation, which is fundamentally due to more grain boundaries absorbed with more interstitial atoms. The derived results could provide a deep understanding of irradiation effects on monocrystalline and nanocrystalline W. (C) 2019 Elsevier B.V. All rights reserved.

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