Mechanical Behavior of Devitrified Ultrafine-grained Al-4.0Y-4.0Ni-0.9Co Matrix Composites
Addition of SiC particulates to a high-strength Al-4.0Y-4.0Ni-0.9Co alloy resulted in enhanced transverse tensile strength in the as-extruded condition due to the breaking up of the prior particle boundaries. However, the room temperature compressive strength of reinforced composite was lower than that of unreinforced alloy because of cavity formation at the SiC particle/matrix interface. The ductility of the composite can be improved by elevated temperature forging with higher processing strain due to the homogenization of SiC particle distribution.
Y. Wang et al., "Mechanical Behavior of Devitrified Ultrafine-grained Al-4.0Y-4.0Ni-0.9Co Matrix Composites," Scripta Materialia, Elsevier, Nov 2008.
The definitive version is available at http://dx.doi.org/10.1016/j.scriptamat.2008.07.018
Materials Science and Engineering
United States. Defense Advanced Research Projects Agency
Keywords and Phrases
Metal Matrix Composite; Ultrafine-Grained Microstructure; Aluminum alloys; Powder metallurgy
Article - Journal
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