The Deformation of Pure Aluminium as Non-isoaxial Bicrystals(Metallurgy)
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概要
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The strength of pure aluminium non-isoaxial bicrystals composed of differently oriented component crystals was investigated. By calculating a "grain boundary strength" 〓σ, the following results were obtained. The grain boundary strength was found to depend on the vector relationship of the slip systems expressed by the compatibility condition and by dislocation pile-up at the grain boundary. The larger the value of the "maximum orientation difference factor" N the lower becomes 〓σ_<0.2>. The bicrystal specimens with largest N showed negative 〓σ_<0.2>. A parabolic relation was found for the strain dependence of the grain boundary strength.
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