PERFORMANCE EVALUATION OF DIFFERENT MATERIALS AS CHILLS IN SAND CASTING OF ALUMINIUM ALLOY

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dc.contributor.authorRAJI, Kabiru Muftau
dc.date.accessioned2016-08-02T08:20:27Z
dc.date.available2016-08-02T08:20:27Z
dc.date.issued2016-02
dc.descriptionA DISSERTATION SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY ZARIA, KADUNA STATE, NIGERIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF A MASTER DEGREE IN MECHANICAL ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING, FACULTY OF ENGINEERING AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA.en_US
dc.description.abstractThis study has evaluated the effectiveness of metallic materials as chill in sand casting of aluminium alloy. Four plates of dimension 165mm x 80mm x10mm were cast using sand mould. Steel, copper and brass chills in form of cylindrical bar of geometry 7mm in diameter and 50mm long were inserted, side by side at regular intervals of 30mm in each sand mould and the last sample was left unchilled. Experimentation involved testing of mechanical properties and metallographic analysis of cast samples. The results obtained revealed that the sample chilled with copper has the highest mechanical properties (ultimate tensile strength of 126.13MPa, hardness of 6.8Hv and impact strength of 23.5J).Also sample chilled with copper revealed evenly distributed microstructure which is due to the fast solidification rate of the casting due to the high thermal conductivity of copper. The brass chill sample displayed better mechanical properties (ultimate tensile strength of 115.8MPa, hardness of 5.7Hv and impact strength of 22.4J) than sample chilled with steel (ultimate tensile strength of 101.33MPa and hardness of 5.4Hv). However, the unchilled sample showed the lowest ultimate tensile strength of 70.67MPa, hardness of 4.2Hv and impact strength of 22.5Jen_US
dc.identifier.urihttp://hdl.handle.net/123456789/8289
dc.language.isoenen_US
dc.subjectPERFORMANCE EVALUATION,en_US
dc.subjectDIFFERENT MATERIALS,en_US
dc.subjectCHILLS,en_US
dc.subjectSAND CASTING,en_US
dc.subjectALUMINIUM ALLOY,en_US
dc.titlePERFORMANCE EVALUATION OF DIFFERENT MATERIALS AS CHILLS IN SAND CASTING OF ALUMINIUM ALLOYen_US
dc.typeThesisen_US
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