Quenching defects in solid solutions and their effect on precipitation

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Abstract
The dislocation structure of quenched aluminium alloys is very different from quenched pure aluminium. This effect has been studied by transmission electron microscopy and is probably associated with the absorption of vacancy-solute atom pairs on gliding screw dislocations and their redistribution as prismatic dislocation loops. Ageing causes precipitation on dislocations and the effects can be analysed in terms of the dislocation substructure and the misfit geometry of the precipitate and matrix lattices