The effect of secondary thermomechanical processing parameters on the ambient temperature behavior of 10% volume 6061 Al-alumina metal matrix composite

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Authors
Eastwood, David F., Jr.
Subjects
Cast metal matrix composite
Particulate
Processing
Ductility
Aging
Advisors
McNelley, Terry R.
Kalu, Peter N.
Date of Issue
1992-03
Date
March 1992
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Thermomechanical processing (TMP) was conducted on a 10 volume percent, 6061 Al-Al(2)O(3) particle reinforced 'metal-matrix composite' (MMC) The TMP employed consisted of isothermal rolling with intermediate annealing using a schedule of reduction with constant strain per pass for most of the schedule. The as-processed material exhibited high strength while simultaneously achieving ductility comparable to that of the unreinforced 6061 matrix alloy. In the fully annealed condition, the composite's strength and ductility were essentially equal to those of the unreinforced aluminum. An aging study showed accelerated aging and greater peak strength for the composite. Finally, a process and heat treatment combination was established in an attempt to optimize simultaneously the strength and ductility of the composite. It was found that the composite could be aged to a peak strength of 340 MPA while retaining a ductility of 14 percent elongation to failure.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
81 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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