발간논문

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Vol.38, No.11, 1483 ~ 1490, 2000
Title
Microstructure , Electriced and Properties of Cu - 14Fe - 2X ( X = Ag , Cr ) Microcomposite Plates
송재숙J . S . Song,홍순익S . I . Hong
Abstract
The strength and electrical conductivity of Cu-14Fe-2X(X = Ag or Cr) microcomposite plates obtained by cold rolling combined with intermediate heat treatments have been investigated. During cold rolling the primary and secondary dendrite arms are aligned along the rolling direction and elongated into filaments. The addition of Ag was found to reduce the filament spacings at the given rolling throughout the deformation processing. The ultimate tensile strength of the Cu-14Fe-2Ag microcomposites was higher than that of Cu-14Fe-2Cr microcomposites, suggesting the refinement of the filaments is more effective than the strengthening of the filaments in strengthening the microcomposites. The strength of Cu-Fe-X microcomposites is dependent on the spacing of the Fe filaments in accord with a Hall-Petch relationship. The fracture surfaces of all the specimens showed ductile-type fracture and iron filaments occasionally observed on the fracture surfaces.
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