The influence of thermomechanical processing on the elevated temperature mechanical behavior of 6061 aluminum - alumina metal matrix composite materials
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Authors
Magill, Marvin D.
Subjects
Composites
Metal Matrix Composites
Thermomechanical Processing
Aluminum - alumina
elevated temperature ductility
elevated temperature strength
Metal Matrix Composites
Thermomechanical Processing
Aluminum - alumina
elevated temperature ductility
elevated temperature strength
Advisors
McNelley, T.R.
Kalu, P. N.
Date of Issue
1990-12
Date
December 1990
Publisher
Monterey, California: Naval Postgraduate School
Language
Abstract
A cast, aluminum-based discontinuous metal matrix composite was thermomechanically processed. The material studied was 6061 aluminum containing 10 vol. pct. or 15 vol. pct. alumina (Al2O3) particles, fabricated by casting and subsequently extruded by Duralcan, Inc. of San Diego, CA. Processing included rolling the extruded bars to large strain values at 350 C and 500 C with controlled reheating between passes. Mechanical testing was conducted at temperatures and strain rates ranging from 200 C to 500 C and 6.7 x 10-5 s-1 to 3.3 x 10-1 s-1, respectively. This material displayed a tendency for increased elongation with an increase in the strain rate above 6.7 x 10-4 s-1. Elongation data for the 350 C rolled materials, containing both 10 vol. pct. and 15 vol. pct. alumina, displayed greater values at lower temperatures than the 500 C rolled materials. Values for strength agreed well with previous results.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
vii, 37 p. ill.
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.