Effect of strain and strain rate on the microstructure of a superplastically deformed Al-10%Mg-0.1%Zr alloy.
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Authors
Alcamo, Mark Edward
Subjects
Superplasticity
Aluminum Alloys
Aluminum-Magnesium Alloys
Thermomechanical Processing
Aluminum Alloys
Aluminum-Magnesium Alloys
Thermomechanical Processing
Advisors
McNelley, T.R.
Date of Issue
1985-06
Date
Publisher
Language
en_US
Abstract
The deformation characteristics of two therraoraechanically
processed, high-Magnesium, Aluminum-Magnesium-Zirconium
alloys were investigated. The processing included warm
rolling at 300°C to 90-95% reduction. Tension testing was
done at various temperatures and strain rates and superplastic
elongations were observed for both alloys. Subsequently,
samples of Al-1 0%Mg-0. 1 %Zr were tested at 300°C
to strains ranging from 8% to 267% as well as to fracture.
Strain rates of 6.67 X 10~ 3 S" 1 and 6.67 X 10"4 S" 1 were
used. These were examined via TEM to observe microstructural
changes which occur during deformation. Quantitative
analysis of the functional relationship between stress, strain, strain rate, and grain size for this alloy is done
in an attempt to .it it's deformation response to current
models for superplastic deformation.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funding
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.