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    Intergranular fracture in nanocrystalline metals

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    Downloads: 801
    Date
    2002-08-01
    Author
    Farkas, Diana
    Van Swygenhoven, H.
    Derlet, P. M.
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    Abstract
    Crack propagation studies in nanocrystalline Ni samples with mean grain sizes ranging from 5 to 12 nm are reported using atomistic simulations. For all grain sizes pure intergranular fracture is observed. Intergranular fracture is shown to proceed by the coalescence of microvoids formed at the grain boundaries ahead of the crack. The energy released during propagation is higher than the Griffith value, indicating an additional grain-boundary accommodation mechanism.
    URI
    http://hdl.handle.net/10919/47855
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    • Scholarly Works, Materials Science and Engineering (MSE) [398]

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