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Effect of Refractory Oxide (CaO) on the Structure and Mechanical Properties of Al-4%Cu Alloy


Affiah E. U., Nwaeju C. C., Nnuka E. E.
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Aluminium-4%wt copper alloy being a 2xxx series alloy, exhibits moderate strength as a result of needle-like structure of the intermetallic compound (Al2Cu(θ)) formed as non-coherent precipitates as the alloy cools slowly to ambient temperature. Hence, this paper focuses on addition of a refractory oxide (CaO) to melted Al-4%wtCu alloy, in order to refine the grain size and structure, thereby improving the mechanical properties of the alloy. The objective of this work is to study the extent to which each concentration of CaO influenced the mechanical properties of Al-4%Cu alloy and the concentrations that gave an appreciable mechanical property suitable for engineering application. The experiment was carried out with refractory oxide (CaO) with concentration of 0.75%, 1%, 1.25%, 1.5%, 1.75%, 2% and 2.25% by weight to melted Al-4%Cu alloy, stirred and sand cast. The results established that the refractory oxide (CaO) can be used to improve the microstructure and mechanical properties of Al-4%Cu alloy.

Affiah E. U., Nwaeju C. C., Nnuka E. E.

Refractory Oxide, Structure, Mechanical Properties and Al-4%Cu Alloy

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Publication Details

Published in : Volume 1 | Issue 6 | November-December - 2015
Date of Publication Print ISSN Online ISSN
2015-12-25 2395-1990 2394-4099
Page(s) Manuscript Number   Publisher
563-569 IJSRSET151676   Technoscience Academy

Cite This Article

Affiah E. U., Nwaeju C. C., Nnuka E. E., "Effect of Refractory Oxide (CaO) on the Structure and Mechanical Properties of Al-4%Cu Alloy", International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 1, Issue 6, pp.563-569, November-December-2015.
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