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Mechanical Properties and Microstructural Behavior of a Metal Matrix Composite Processed by Severe Plastic Deformation Techniques

Published online by Cambridge University Press:  10 December 2015

Shima Sabbaghianrad  and
Terence G. Langdon
Shima Sabbaghianrad*
Affiliation:
Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, U.S.A
Terence G. Langdon
Affiliation:
Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, U.S.A Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, U.K.
*
*(Email: ssabbagh@usc.edu)
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Abstract

A severe plastic deformation (SPD) technique was applied to an Al-7075 alloy reinforced with 10 vol.% Al2O3. This processing method of high-pressure torsion (HPT) was performed at room temperature under a pressure of 6.0 GPa through a total number of up to 20 turns. The metal matrix composite (MMC) showed a significant grain refinement from an initial average grain size of ∼8 μm to ∼300 nm after processing by HPT through 20 turns which led to an increase in the average values of Vickers microhardness at room temperature.

Keywords

hardnessmicrostructurecomposite

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Type
Articles
Information
MRS Advances , Volume 1 , Issue 58: Mechanical Behavior and Failure of Materials , 2016 , pp. 3865 - 3870
Copyright
Copyright © Materials Research Society 2015 

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