Thermomechanical processing of aluminum alloy 2090 for superplasticity

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Authors
Choudhry, Mohammad B.
Subjects
Thermomechanical
Superplasticity
TMP Micrograph
Recystallization
Advisors
McNelley, Terry
Date of Issue
1989
Date
March 1989
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The effect of processing variables on the microstructural development and superplasticity of aluminum alloy 2090, a high strength Aluminum-Copper-Lithium-Zirconium alloy of reduced density in comparison to other A1-based materials, was investigated. Following previous research, warm rolling was conducted to strains, up to 3.36 and it was found that increasing the strain to values greater than 2.6 offered no improvement in subsequent superplastic response. Increased rolling speeds likewise did not enhance ductibility above a maximum value of approximately 240 percent. Microstructural examination revealed a refined, homogeneous microstructure consisting of T2 particles distributed in an alloy matrix. These particles reside a triple junctions in a recovered microstructure.
Type
Thesis
Description
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Department
Mechanical Engineering
Organization
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Format
74 p.
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