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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
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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