Size-Dependent Strengthening of Particle-Reinforced Aluminum Matrix Composites

Report No. ARL-TR-5530
Authors: Cyril L. Williams
Date/Pages: May 2011; 24 pages
Abstract: The finite-element-based microstructural modeling technique developed by Suh et al. (Suh, Y. S.; Joshi, S. P.; Ramesh, K. T. Acta. Mater. 2009, 57, 5848) was reviewed and used for studying the different responses between isotropic and anisotropic aluminum matrix with varying particle sizes. The results show that the overall response of the material was identical when the matrix material was changed from isotropic-elastic/plastic aluminum to anisotropic-elastic/isotropic-plastic aluminum, especially for the 5% volume fraction. However, the anisotropic-elastic/isotropic-plastic aluminum exhibited a lower elastic modulus than that of the isotropic-elastic/plastic-aluminum. Also, the flow stresses were lower for anisotropic-elastic/isotropic-plastic aluminum for the 20% volume fraction.
Distribution: Approved for public release
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Last Update / Reviewed: May 1, 2011