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Effects of alumina (Al2O3) addition on the cell structure and mechanical properties of 6061 foams

Published online by Cambridge University Press:  09 July 2013

Nazim Mahmutyazicioglu ,
Onder Albayrak ,
Mehmet Ipekoglu  and
Sabri Altintas
Nazim Mahmutyazicioglu
Affiliation:
Department of Mechanical Engineering, Bogazici University, Bebek 34342, Istanbul, Turkey
Onder Albayrak*
Affiliation:
Department of Mechanical Engineering, Mersin University, Yenisehir 33343, Mersin, Turkey
Mehmet Ipekoglu
Affiliation:
Department of Mechatronic Systems Engineering, Turkish-German University, Beykoz 34820, Istanbul, Turkey
Sabri Altintas
Affiliation:
Department of Mechanical Engineering, Bogazici University, Bebek 34342, Istanbul, Turkey
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

In this study, a powder blend representing 6061 Al-alloy was first mixed with Al2O3 ceramic particles and then foamed by using the powder compact melting method. 6061-Al2O3 foams and control specimens 6061 foams (without ceramic reinforcement) were produced. The effects of both different ratios of Al2O3 particle addition and different kinds of heat treatment on hardenability, structure and mechanical behavior of the final foams were investigated. Foams that were fully heat treated had the highest hardness values, and they performed best with an increase in collapse strength up to 100% over the untreated samples. Improved cell structure and decreased drainage were obtained when the Al2O3 addition was not more than 5 vol%. The compression test results were interpreted in terms of the foam’s microstructure, and correlations were made relating to the unloading modulus and compression strength of the foams to the relative density.

Keywords

foamcellular (material form)Al
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 17: Focus Issue: Advances in the Synthesis, Characterization, and Properties of Bulk Porous Materials , 14 September 2013 , pp. 2509 - 2519
Copyright
Copyright © Materials Research Society 2013 

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