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Title Effect of melting temperature on the energy absorbance of Pb-Sb-Cu alloy at fracture resulting from
Journal International journal of Engineering And Applied Science
Publisher Faculty of Engineering, Nnamdi Azikiwe University, Awka Nigeria.
Issue 1
ISSN 1119-8109
Pages 112-117
Subject Metallurgical and Materials Engineering
Date of Publication 2008

AUTHOR(S) C.I . Nwoye, S.I. Okeke

ABSTRACT

The effect of melting temperature on the energy absorbance of Pb-Sb-Cu alloy at fracture, resulting from impact load has been studied. The casting process was carried out using three different techniques; Technique A, involving simultaneous addition of Cu powder and pouring of the molten Pb-Sb into the mould. Techniques B, involving addition of Cu powder intermittently as pouring of Pb-Sb into the mould was going on and Technique C involving pouring a stirred mixture of heated Pb-Sb alloy and powdered Cu into the mould. The cast alloys were cooled in water, air and furnace. Impact test to determine the energy absorbance was carried out prior to melting of the alloys. Copper was added to the base alloy by dispersion using the three casting techniques. The results of the investigation showed that prior to fracture, energy absorbance of the Pb-Sb-Cu alloy increased correspondingly with increased melting temperature of the alloy (up to 4400C ) as a result of corresponding increase in Cu addition and distribution (up to 8.26%) within the Pb-Sb matrix. Technique A imparted higher impact strength and energy absorbance on the alloy (compared with the other techniques used). Furnace cooling also conferred higher impact strength and energy absorbance on the Pb-Sb-Cu alloy compared with similar alloy cooled in water and air, irrespective of the casting technique used.


Keywords: Effect; Melting temperature; Energy absorbance; Pb-Sb-Cu alloy




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