Paper Title:
New Composite Metal Foams under Compressive Cyclic Loadings
  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.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
1868-1873
DOI
10.4028/www.scientific.net/MSF.539-543.1868
Citation
A. Rabiei, B. Neville, N. Reese, L. Vendra, "New Composite Metal Foams under Compressive Cyclic Loadings", Materials Science Forum, Vols. 539-543, pp. 1868-1873, 2007
Online since
March 2007
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Price
$32.00
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