Effects of Temperature on Crack Propagation of Nanocrystalline Nickel: A Molecular Dynamics Approach

Abstract:

The primary purpose of this paper is to study the effects of temperature on crack propagation of nanocrystalline nickel by Molecular Dynamics (MD) simulations. Cracks are loaded in tension mode I. Results show that dislocation emission from a crack tip in nanocrystalline nickel due to the recombination of atomic lattice, then distortion of the crack tip promote crack propagation. The studies we have performed showed that temperature takes a great influence on the crack propagation and the crack shape, and we also found that the crack blunt obviously at high temperature.

• Periodical: Advanced Materials Research (Volumes 926-930)
• Pages: 98-102
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.926-930.98
• Online since: May 2014
• Authors: Zi Qiang Li, Jin Gui Yu, Qiao Xin Zhang
• Keywords: Crack Propagation, Dislocation, Molecular Dynamic (MD), Nanocrystalline Nickel

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