Density-Graded Aluminum Foams by the Corrosion Method


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Optimum corrosive density-grading of T6- and solution-treated alloys was studied using NaOH solutions. Rough corroded strut surfaces in aluminum foams were found to transform to smooth metallic surfaces with an increase in pH from 10 to 13. For instance, during immersion in pH13 solutions, pits with large curvatures appeared on strut surfaces, and corrosive mass losses increased. Strut diameters also decreased, and open cell windows became wider, without an increase in visible damage. Processing parameters such as pH, corrosion rate, and the surface state of the struts were examined to optimize final structure. An experimental method for grading of relative density continuously between 10% and 5% is described.



Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran




Y. Matsumoto et al., "Density-Graded Aluminum Foams by the Corrosion Method", Materials Science Forum, Vols. 539-543, pp. 1903-1908, 2007

Online since:

March 2007




[1] G. J. Davies and S. Zhen: J. Mater. Sci. Vol. 18 (1983), p.1899.

[2] M. F. Ashby, A. Evans, N. A. Fleck, L. J. Gibson, J. W. Hutchinson and H. N. G. Wadley: Metal foams: a design guide (Butterworth Heinemann, Boston, MA 2000).

[3] B. -K. Park, G. Yandong and B. -Y. Hur: Fabrication and Mechanical Properties of Open-cell Al-Si Foam, Program and Abstracts of the 4 th International Conference on Porous Metals and Metal Foaming Technology (METFOAM 2005), Kyoto, September 2005, JIMIC-4, p.37.

[4] C. Koerner, M. Hirschmann and R. F. Singer: Integral Foam Molding of Light Metals. ibid. p.5-B7.

[5] A. H. Brothers and D. C. Dunand: Density-graded Aluminum Foams. ibid. p.17-B47.

[6] ERG Materials and Aerospace Corp.: Duocel Aluminum Foam, Duocel Foam Literature and Reports (ERG Aerospace, Oakland, CA).

[7] E. H. Hollingworth and H. Y. Hunsicker: Corrosion of aluminium and aluminium alloys, ASM Metals Handbook, Vol. 2: Properties and Selection, Nonferrous Alloys and Pure Materials (ASM International, Materials Park, OH 1990).

[8] S. Sakashita, T. Nakayama, N. Ibaraki and K Ochiai: Kobe Steel Engineering Reports Vol. 50 (2000), p.61 (in Japanese).

[9] A. -M. Harte, N. A. Fleck and M. F. Ashby: Acta Mater. Vol. 47 (1999), p.2511.

[10] H. Bart-Smith, A. -F. Bastawros, D. R. Mumm, A. G. Evans, D. J. Sypeck and H. N. G. Wadley: Acta Mater. Vol. 46 (1998), p.3583.

[11] K. A. Dannemann and J. Lankford Jr.: Mater. Sci. Eng. A Vol. A293 (2000), p.157.

[12] T. G. Nieh, K. Higashi and J. Wadsworth: Mater. Sci. Eng. A Vol. A283 (2000), p.105.

[13] J. Zhou, P. Shrotriya and W. O. Soboyejo: Mech. Mat. Vol. 36 (2004), p.781.

[14] C. S. Marchi, J. -F. Despois and A. Mortensen: Acta Mater. Vol. 52 (2004), p.2895.

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