Initiation and growth of the discontinuous precipitation reaction at [0 1 1] symmetric tilt boundaries in Cu–Be alloy bicrystals
作者： R. Monzen , C. Watanabe , D. Mino , S. Saida
DOI: 10.1016/J.ACTAMAT.2004.11.019
关键词: Thermal diffusivity 、 Boundary (topology) 、 Condensed matter physics 、 Activation energy 、 Crystallography 、 Grain boundary 、 Precipitation (chemistry) 、 Diffusion 、 Transmission electron microscopy 、 Materials science 、 Plane (geometry)
摘要: Abstract The initiation and growth of discontinuous precipitation (DP) at [0 1 1] symmetric tilt boundaries in Cu–0.75 wt% Be alloy bicrystals have been studied. Transmission electron microscopy revealed that γ precipitates tended to nucleate a boundary such manner their habit plane, {1 1 2} α or {4 4 5} , with one the adjoining grains lay as close possible boundary. plane low energy formed on both sides behind an initially migrating boundary, indicating importance existence low-energy for initial migration. incubation period initiate DP cell rate show good correlation A kinetic analysis using models Turnbull, Petermann Hornbogen has yielded diffusion data. higher-energy higher diffusivity smaller activation energy.
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