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Closed-cell Al alloy composite foams: Production and characterization

Malekjafarian, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2012.05.036
  3. Publisher: 2012
  4. Abstract:
  5. Foamy Al alloy SiCp composites of different densities ranging from 0.4 to 0.7g/cm3 were manufactured by melt-foaming process, which consisted of direct CaCO3 addition into the molten A356 aluminum bath. Mechanical properties and morphological observations indicated that the three-stage deformation mechanism of typical cellular foams is dominant in the produced A356 aluminum foams. Middle-stage stress plateau shrinkage plus compressive strength and bending stress enhancements were observed in denser foams. With the same Al/SiCp ratio, energy absorption ability and plastic collapse strength of the closed-cell foams were increased with the foam density. Doubling cell-face bending effects resulted in larger compressive than bending strengths in the closed-cell foams; while stiffness lowering was due to the cell-face stretching conditions
  6. Keywords:
  7. Al alloys ; Al/SiCp ; Aluminum foam ; Bending effect ; Bending stress ; Cellular foams ; Closed cell foams ; Closed cells ; Deformation mechanism ; Energy absorption ability ; Foam densities ; Morphological observations ; Plastic collapse strength ; Stress plateau ; Aluminum alloys ; Bending strength ; Biomechanics ; Calcium carbonate ; Cells ; Cytology ; Mechanical properties ; Foams
  8. Source: Materials and Design ; Volume 42 , December , 2012 , Pages 8-12 ; 02641275 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0261306912003469