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Vol.30, No.6, 648 ~ 656, 1992
Title
The Process of Mechanical Alloying in Al - 4Mg System
조준식Joon Sic Cho, 권숙인Sook In Kwun
Abstract
The mechanical alloying is an unique process in that it is an entirely solid state process, permitting dispersion of insoluble phases such as refractory oxides and addition of reactive alloying elements into base alloys. Fine grain size and high density dislocation substructure produced during mechanical alloying process promote the inter diffusion kinetics through defect regions such as dislocations and grain boundaries. In this study, the pipe diffusion and grain boundary diffusion are found to be more dominant than lattice diffusion. The grain boundary diffusion in Al-4Mg system becomes the controlling mechanism during mechanical alloying process because the process makes the grain size of the alloy particles as small as possible as the process time becomes longer.
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