Morphology and Elastic Properties of Aluminum Foams Produced by a Casting Technique
AA6101 aluminum foams (composition in wt.%: Al-0.6 Mg-0.5 Si) were fabricated by using a directional solidification technique. The 3-D morphology of the foams was examined using synchrotron x-ray tomography and the results revealed relatively uniform, open-celled structures. The mechanical (compress...
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| Veröffentlicht in: | Scripta Materialia 1998-04, Vol.38 (10), p.1487-1494 |
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| creator | Nieh, T.G Kinney, J.H Wadsworth, J Ladd, A.J.C |
| description | AA6101 aluminum foams (composition in wt.%: Al-0.6 Mg-0.5 Si) were fabricated by using a directional solidification technique. The 3-D morphology of the foams was examined using synchrotron x-ray tomography and the results revealed relatively uniform, open-celled structures. The mechanical (compression) behavior of the foams was also characterized. The stress-strain curves exhibited a typical three-stage behavior: elastic, nearly-perfect plastic (i.e., with a stress plateau), and densification. The elastic moduli of a 10%-dense foam in the directions that are transverse and parallel to the solidification direction were measured to be 630 and 670 MPa, respectively. Theoretical calculations of the modulus using a FEM method with the element-by-element (EBE) formalism were also carried out. The calculated values of approx570 and 635 MPa compared favorably with the experimental data. |
| doi_str_mv | 10.1016/S1359-6462(98)00090-6 |
| format | Article |
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The 3-D morphology of the foams was examined using synchrotron x-ray tomography and the results revealed relatively uniform, open-celled structures. The mechanical (compression) behavior of the foams was also characterized. The stress-strain curves exhibited a typical three-stage behavior: elastic, nearly-perfect plastic (i.e., with a stress plateau), and densification. The elastic moduli of a 10%-dense foam in the directions that are transverse and parallel to the solidification direction were measured to be 630 and 670 MPa, respectively. Theoretical calculations of the modulus using a FEM method with the element-by-element (EBE) formalism were also carried out. 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The 3-D morphology of the foams was examined using synchrotron x-ray tomography and the results revealed relatively uniform, open-celled structures. The mechanical (compression) behavior of the foams was also characterized. The stress-strain curves exhibited a typical three-stage behavior: elastic, nearly-perfect plastic (i.e., with a stress plateau), and densification. The elastic moduli of a 10%-dense foam in the directions that are transverse and parallel to the solidification direction were measured to be 630 and 670 MPa, respectively. Theoretical calculations of the modulus using a FEM method with the element-by-element (EBE) formalism were also carried out. 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The 3-D morphology of the foams was examined using synchrotron x-ray tomography and the results revealed relatively uniform, open-celled structures. The mechanical (compression) behavior of the foams was also characterized. The stress-strain curves exhibited a typical three-stage behavior: elastic, nearly-perfect plastic (i.e., with a stress plateau), and densification. The elastic moduli of a 10%-dense foam in the directions that are transverse and parallel to the solidification direction were measured to be 630 and 670 MPa, respectively. Theoretical calculations of the modulus using a FEM method with the element-by-element (EBE) formalism were also carried out. The calculated values of approx570 and 635 MPa compared favorably with the experimental data.</abstract><cop>New York, NY</cop><pub>Elsevier Ltd</pub><doi>10.1016/S1359-6462(98)00090-6</doi><tpages>8</tpages></addata></record> |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | ALUMINIUM BASE ALLOYS COMPARATIVE EVALUATIONS Condensed matter: structure, mechanical and thermal properties ELASTICITY Elasticity, elastic constants Exact sciences and technology FINITE ELEMENT METHOD FOAMS MATERIALS SCIENCE Mechanical and acoustical properties of condensed matter Mechanical properties of solids MORPHOLOGY Physics PLASTICITY |
| title | Morphology and Elastic Properties of Aluminum Foams Produced by a Casting Technique |
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