New Composite Metal Foams under Compressive Cyclic Loadings

Article Preview

Abstract:

New composite metal foams are processed using powder metallurgy (PM) and gravity casting techniques. The foam is comprised of steel hollow spheres, with the interstitial spaces occupied by a solid metal matrix (Al or steel alloys). The cyclic compression loading of the products of both techniques has shown that the composite metal foams have high cyclic stability at very high maximum stress levels up to 68 MPa. Under cyclic loading, unlike other metal foams, the composite metal foams do not experience rapid strain accumulation within collapse bands and instead, a uniform distribution of deformation happen through the entire sample until the densification strain is reached. This is a result of more uniform cell structure in composite metal foams compared to other metal foams. As a result, the features controlling the fatigue life of the composite metal foams have been considered as sphere wall thickness and diameter, sphere and matrix materials, and processing techniques as well as bonding strength between the spheres and matrix.

You might also be interested in these eBooks

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

1868-1873

Citation:

Online since:

March 2007

Export:

Price:

[1] Sugimura, Y., Rabiei, A., Evans, A. G., Harte, A. M., and Fleck, N. A., Compression fatigue of a cellular Al alloy, Materials Science and Engineering A, 269, 38-48, (1999).

DOI: 10.1016/s0921-5093(99)00147-1

Google Scholar

[2] Harte, A. M., Fleck, N. A., and Ashby, M. F., Fatigue failure of an open cell and a closed cell aluminium alloy foam, Acta Materialia, 47, 2511-2524, (1999).

DOI: 10.1016/s1359-6454(99)00097-x

Google Scholar

[3] Zettl, B., Mayer, H., Stanzl-Tschegg, S. E., and Degischer, H. P., Fatigue properties of aluminium foams at high numbers of cycles, Materials Science and Engineering A, 292, 1-7, (2000).

DOI: 10.1016/s0921-5093(00)01033-9

Google Scholar

[4] Motz, C., Friedl, O., and Pippan, R., Fatigue crack propagation in cellular metals, International Journal of Fatigue, 27, 1571-1581, (2005).

DOI: 10.1016/j.ijfatigue.2005.06.044

Google Scholar

[5] Rabiei, A., Evans, A. G., and Hutchinson, J. W., Heat Generation during the Fatigue of a Cellular Al Alloy, Metallurgical and Materials Transactions A, 31A, 1129-1136, (2000).

DOI: 10.1007/s11661-000-0108-0

Google Scholar

[6] Lehmus, D, Marschner, C, and Banhart, J., Influence of heat treatment on compression fatigue of aluminum foams, Journal of Materials Science, 37, (2002).

Google Scholar

[7] Banhart, J. and Brinkers, W, Fatigue Behavior of Aluminum Foams, Journal of Material Science Letters, 18, 617-619, (1999).

Google Scholar

[8] Zhou, J. and Soboyejo, W. O., Compression-compression fatigue of open cell aluminum foams: macro/micro- mechanisms and the effects of heat treatment, Materials Science and Engineering A, 369, 23-35, (2004).

DOI: 10.1016/j.msea.2003.08.009

Google Scholar

[9] Rabiei, A. and O'Neill, A. T., A study on processing of a composite metal foam via casting, Materials Science and Engineering: A, 404, 159-164, (2005).

DOI: 10.1016/j.msea.2005.05.089

Google Scholar

[10] Rabiei, A., O'Neill, A. T., and Neville, B. P., Processing and Development of a New High Strength Metal Foam, MRS Fall 2004 Proceedings, 841, 517-526, (2005).

Google Scholar

[11] Neville, B. P and Rabiei, A., Processing and Characterization of Composite Metal Foams through Powder Metallurgy, Materials Science and Engineering: A, in review.

Google Scholar

[12] Bart-Smith, H., Bastawros, A. F., Mumm, D. R., Evans, A. G., Sypeck, D. J., and Wadley, H. N. G., Compressive deformation and yielding mechanisms in cellular Al alloys determined using X-ray tomography and surface strain mapping, Acta Materialia, 46, 3583-3592, (1998).

DOI: 10.1016/s1359-6454(98)00025-1

Google Scholar

[13] Simone, A. E. and Gibson, L. J., Effects of solid distribution on the stiffness and strength of metallic foams, Acta Materialia, 46, 2139-2150, (1998).

DOI: 10.1016/s1359-6454(97)00421-7

Google Scholar

[14] Sugimura, Y., Meyer, J., He, M. Y., Bart-Smith, H., Grenstedt, J., and Evans, A. G., On the mechanical performance of closed cell Al alloy foams, Acta Materialia, 45, 5245-5259, (1997).

DOI: 10.1016/s1359-6454(97)00148-1

Google Scholar

[15] Rabiei, A., Vendra, L, Reese, N, and Neville, B. P, Processing and Characterization of a New Composite Metal Foam, 2005, in press.

Google Scholar

[16] Rabiei, A., Neville, B. P, Reese, N, and Vendra, L, Mechanical Properties of New Composite Metal Foams under Compressive Monotonic and Fatigue Loadings, Materials Science and Technology, 2005, in press.

Google Scholar