STUDY OF MACROSEGREGATION EFFECTS ON THERMAL AND ELECTRICAL CHARACTERISTICS OF ALUMINUM-COPPER ALLOY

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dc.contributor.authorObiekea, V.D.
dc.contributor.authorSekunowo, I.O.
dc.contributor.authorSobamowo, M.G.
dc.contributor.authorAdeosun, S.O.
dc.date.accessioned2020-03-28T17:17:26Z
dc.date.available2020-03-28T17:17:26Z
dc.date.issued2018
dc.description.abstractMacrosegregation phenomenon regardless of casting size often induces high partition coefficient (k) impacting adversely the thermal and electrical properties of cast binary alloy. In this study, an experimental investigation of macrosegregation propagation in aluminum-copper alloy solidification is reported. Al6wt. % Cu was produced at varied pouring heights including 100 mm, 200 mm, 300 mm, 400 mm and 500 mm. The combinations of optical, scanning electron and energy dispersive spectrometry were used to evaluate the extent of segregation in the casts while the electrical and thermal conductivity properties were determined using Wiedemann-Franz Law. Results show that the Al-Cu cast at a pouring height of 400 mm demonstrated the highest electrical and thermal conductivity of 55 %IACS and 2.1437 W/mK 10-6 respectively. This compared well with established standard values in application such as heat exchangers and electronic sensors. The occurrence of minimal macrosegregation at 400 mm pouring height may be attributed to appropriateness of melt-flow regime resulting in desirable microstructure that prevents long-range solute/solvent segregation.en_US
dc.identifier.citationObiekea, V.D. Sekunowo, I.O. Sobamowo, M.G. Adeosun, S.O. (2018). STUDY OF MACROSEGREGATION EFFECTS ON THERMAL AND ELECTRICAL CHARACTERISTICS OF ALUMINUM-COPPER ALLOY. ACTA TECHNICA CORVINIENSIS – Bulletin of Engineering Tome XI: 35-38en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/8228
dc.language.isoenen_US
dc.publisherACTA TECHNICA CORVINIENSIS – Bulletin of Engineeringen_US
dc.subjectmacrosegregation, Al-Cu alloy, electrical conductivity, thermal conductivityen_US
dc.titleSTUDY OF MACROSEGREGATION EFFECTS ON THERMAL AND ELECTRICAL CHARACTERISTICS OF ALUMINUM-COPPER ALLOYen_US
dc.typeArticleen_US
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