Title

Mechanical Behavior of Devitrified Ultrafine-grained Al-4.0Y-4.0Ni-0.9Co Matrix Composites

Abstract

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.

Department(s)

Materials Science and Engineering

Sponsor(s)

United States. Defense Advanced Research Projects Agency

Keywords and Phrases

Metal Matrix Composite; Ultrafine-Grained Microstructure

Library of Congress Subject Headings

Aluminum alloys
Powder metallurgy

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 Elsevier, All rights reserved.

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