Publication:
The influence of alloy composition and thermo-mechanical processing procedure on microstructure and mechanical properties of high-magnesium aluminum-magnesium alloys

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Authors
Johnson, Ralph Brian
Subjects
Aluminum-magnesium alloys
Thermo-mechanical testing
Advisors
McNelly, Terry R.
Date of Issue
1980-06
Date
June 1980
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The purpose of this research was the development of a thermo­ mechanical procedure to process Aluminum- Magnesium alloys and testing effects of alloying additions on these alloys. Magnesium contents of eight and ten weight percent and the alloying effects of copper and manganese were studied. Microstructures and mechanical properties at six warm rolling temperatures located above and below the solvus line of these alloys were examined. Ultimate tensile strengths in excess of 680 MPa (99 KSI) were obtained. Microstructural evidence indicated that the precipitation of the "beta" intermetallic phase was one of the most important mechanisms in controlling the strength of the alloy. Furthermore, precipitation is so rapid at higher temperatures that it becomes the strongest force within the microstructure and its presence prevents any possible recrystallization of the alloy. However, when the temperature exceeds the solvus temperature for the alloy, recrystallization does occur with large losses in both yield and ultimate tensile strength.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
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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