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Significantly enhanced crack blunting by nanograin rotation in nanocrystalline materials

Scripta Materialia, ISSN: 1359-6462, Vol: 151, Page: 19-23
2018
  • 5
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    5
    • Citation Indexes
      5
  • Captures
    11

Article Description

Experiments have shown that stress-driven grain growth is closely related to the enhanced crack growth resistance and the exceptional tensile ductility as observed in several nano-metals. However, the quantitative correlation remains unsolved. Here we developed a theoretical model to investigate the effect of nanograin rotation, one of the main modes of stress-driven grain growth, on dislocation emission from the tip of a semi-infinite crack in a nanograined solid. Our findings show that the nanograin rotation can significantly enhance the capability of the crack to emit dislocations, thus leading to strong crack blunting in nanomaterials.

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