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Characterization of Porous Gasar Aluminum

Published online by Cambridge University Press:  10 February 2011

R. J. Bonenberger ,
A. J. Kee ,
R. K. Everett  and
P. Matic
R. J. Bonenberger
Affiliation:
FM Technologies, Inc., 10529-B Braddock Rd., Fairfax, VA 22032
A. J. Kee
Affiliation:
Geo-Centers, Inc., P.O. Box 441340, Fort Washington, MD 20749
R. K. Everett
Affiliation:
Naval Research Laboratory, Code 6382, 4555 Overlook Ave., SW, Washington, DC 20375
P. Matic
Affiliation:
Naval Research Laboratory, Code 6382, 4555 Overlook Ave., SW, Washington, DC 20375
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Abstract

Experimental and numerical analyses were performed on porous aluminum samples to evaluate microstructure and mechanical properties. Experiments consisted of tensile tests on dog-bone specimens containing 9 to 17% porosity, which were instrumented with axial and transverse extensometers. Properties measured included Young's modulus, Poisson's ratio, proportional limit, 0.2% offset yield strength, and ultimate tensile strength. Results indicated that Young's modulus and all strengths decreased with increasing porosity, but Poisson's ratio remained constant with porosity. For the numerical simulations, 3-D, mesoscale, multilayer models were constructed to evaluate the effects of pore morphology and interactions on material properties. The models allowed systematic spatial positioning of the pore within the cell and the ability to form solid zones. Pore arrangement, the effect of constraint, and gradients on the stress state were investigated. By using different combinations of hex cells as building blocks, several complicated microstructural arrangements were simulated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 521: Symposium R – Porous & Cellular Materials for Structural Applications , 1998 , 303
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1. Shapovalov, V. I. and Timchenko, A. G., Phys. Met. and Metall. 76 (3), 335–337 (1993).Google Scholar
2. Schapovlov, V. I., MRS Bull. 19 (4), 24–28 (1994).Google Scholar
3. Wolla, J. M. and Provenzano, V. in Advances in Porous Materials, edited by S. Komarneni, D. Smith, and J. Beck (Mater. Res. Soc. Proc. 371, Pittsburgh, PA, 1995) pp. 377–382.Google Scholar
4. Kee, A. and Matic, P., Mater. Sci. Engr. A224, 85–95 (1995).Google Scholar
5. Kee, A., Matic, P., and Wolla, J., Mater. Sci. Engr. A230, 14–24 (1997).Google Scholar
6. Kee, A. and Matic, P., in ABAQUS User's Conf. Proc. (Hibbitt, Karlsson, & Sorensen, Pawtucket, RI, 1996) pp. 403–417.Google Scholar
7. ASTM E8, in Annual Book of ASTM Standards, v. 3.01 (ASTM, Philadelphia, PA, 1993) pp. 130–149.Google Scholar
8. Bell, J. F., in Handbuch der Physik, v. 6, Mechanics of Solids I, edited by Fhigge, S. and Truesdell, C. (Springer-Verlag, New York, NY, 1973) pp. 92–97; 147–148.Google Scholar
9. Everett, R. K., Ph.D. dissertation, University of Maryland, 1996.Google Scholar
10. ABAQUS/Explicit User Manuals: Ver. 5.6 (Hibbitt, Karlsson, & Sorensen, Pawtucket, RI, 1996).Google Scholar
11. ABAQUS/Post Manual: Ver. 5.6 (Hibbitt, Karlsson, & Sorensen, Pawtucket, RI, 1996).Google Scholar