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Metals 2015, 5(2), 822-835; doi:10.3390/met5020822

Effect of Sphere Properties on Microstructure and Mechanical Performance of Cast Composite Metal Foams

Department of Mechanical and Aerospace Engineering, North Carolina State University 911 Oval Drive, Campus Box 7910, Raleigh, NC 27695, USA
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Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 3 April 2015 / Revised: 2 May 2015 / Accepted: 6 May 2015 / Published: 20 May 2015
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Abstract

Aluminum-steel composite metal foams (Al-S CMF) are manufactured using steel hollow spheres, with a variety of sphere carbon content, surface roughness, and wall porosity, embedded in an Aluminum matrix through gravity casting technique. The microstructural and mechanical properties of the material were studied using scanning electron microscopy, energy dispersive spectroscopy, and quasi-static compressive testing. Higher carbon content and surface roughness in the sphere wall were responsible for an increase in formation of intermetallic phases which had a strengthening effect at lower strain levels, increasing the yield strength of the material by a factor of 2, while higher sphere wall porosity resulted in a decrease on the density of the material and improving its cushioning and ductility maintaining its energy absorption capabilities. View Full-Text
Keywords: casting; Composite Metal Foam; Al-Fe-Si intermetallic; quasi-static loading; hollow spheres casting; Composite Metal Foam; Al-Fe-Si intermetallic; quasi-static loading; hollow spheres
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Garcia-Avila, M.; Rabiei, A. Effect of Sphere Properties on Microstructure and Mechanical Performance of Cast Composite Metal Foams. Metals 2015, 5, 822-835.

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