발간논문

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Vol.39, No.7, 778 ~ 787, 2001
Title
Mechanical and Electrical Properties of Cu-Cr Base Microcomposite Plates Fabricated by the Deformation Processing
송재숙Jae Sook Song,홍순익Sun Ig Hong
Abstract
The strength and electrical conductivity of Cu-7Cr-0.9Ag-0.3Fe and Cu-7Cr-0.9Co-0.4Fe microcomposite plates obtained by cold rolling combined with intermediate heat treatments have been investigated. During cold working the primary and secondary dendrite arms were aligned along the rolling direction and elongated into filaments and also coarse Cr particles were found to be distributed uniformly in the matrix after thermo-mechanical deformation processing. The ultimate tensile strength and the conductivity of the Cu-Cr based microcomposites containing Ag were higher than those of Cu-Cr microcomposites containing Co. The strength of Cu-Cr composites was dependent on the spacing of the fine Cr filaments and volume fraction of the coarse Cr particles in accordance with a rule of mixture. The fracture surfaces of all the specimens showed ductile-type fracture.
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