On the micromechanical modelling of the effective diffusion coefficient of a polycrystalline material
作者： Anna G. Knyazeva , Galina P. Grabovetskaya , Ivan P. Mishin , Igor Sevostianov
DOI: 10.1080/14786435.2015.1046965
关键词:
摘要: This study focuses on calculation of the effective diffusion coefficient a polycrystalline material accounting for grain size and shapes. Polycrystal is modelled as composite consisting matrix with high diffusivity (grain boundaries triple junctions) inhomogeneities low (bulk grains including crystal defects like dislocations). The segregation at accounted for. Typical micromechanical models are re-written assuming that have shape ellipsoids revolution (spheroids). results compared (1) numerical hydrogen in an imaginary (2) experimental nickel polycrystal available literature. approach can be used extraction information along boundaries.
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