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Effects of Thermal Processing on Closed-Cell Aluminium Foams

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Characterization of Minerals, Metals, and Materials 2017


The effects of post-foaming thermal processing on the quasi-static compressive strength of closed-cell aluminium foam with an average relative density of 0.56 g/cc have been investigated. Samples were subject to one of four material conditions: as-received (AR), warm aged (WA), solution treated (ST), and annealed (AT). X-ray diffraction (XRD ) was performed to determine a relationship between each material condition and macro-crystallographic texture of the dendritic α-Al phase. It was found that all heat treated samples contained clear deviations from random texture towards the exterior regions of the samples, indicating non-uniform recrystallization kinetics. The ST and WA samples exhibited the highest yield stresses and energy absorption , with the AT samples exhibiting the lowest. Additionally, it was found that the AR and WA conditions lost 12.8 and 15.6% of their total mass from brittle cell wall crumbling, whereas the AT and ST conditions lost 2.5 and 3.0% of their total mass.

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The authors gratefully acknowledge UNSW Canberra’s Defence Related Research program that partly funded this work. Patrick Nolan of the UNSW Canberra technical support group is thanked for his help on the mechanical testing performed for this work.

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Correspondence to A. D. Brown .

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© 2017 The Minerals, Metals & Materials Society

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Brown, A.D., Hutchison, W.D., Islam, M.A., Kader, M.A., Escobedo, J.P., Hazell, P.J. (2017). Effects of Thermal Processing on Closed-Cell Aluminium Foams. In: Ikhmayies, S., et al. Characterization of Minerals, Metals, and Materials 2017. The Minerals, Metals & Materials Series. Springer, Cham.

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