Abstract
One of the first differences among microcrystalline, ultrafine, and nanocrystalline metals and alloys is the progressive time-dependent deformation, or creep, at room temperature. The effect of grain boundary volume on the creep mechanisms such as diffusion creep is described. The different mechanisms acting during creep as reducing the grain size through UFG to NC regimes and the related models are shown in this chapter. The diffusion-governed grain boundary sliding during creep deformation in nanostructured materials is discussed. The creep life in UFG materials is described and the effect of dislocations due to SPD affecting grain boundary sliding is underlined. The varying fraction of HAGBs and LAGBs in SPDed metals and the effect on creep resistance are discussed. The different behavior due to the various mechanisms acting during creep in nanocrystalline metals and alloys has been described. At the end of the chapter, the creep behavior of nanocrystalline thin films is shown.
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Cavaliere, P. (2021). Creep in Nanostructured Materials. In: Fatigue and Fracture of Nanostructured Materials. Springer, Cham. https://doi.org/10.1007/978-3-030-58088-9_6
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