Optimizing superplastic response in NAVALITE

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Authors
Chester, Alden P.
Subjects
Advisors
McNelley, T.R.
Date of Issue
1989-06
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Superplastic ductilities up to 428 percent have been attained during research into thermomechanical processing of Al-2.70Mg-2.04Li-0.50Cu-0.13Zr (compositions in wt.pct.; alloy composition corresponding to NAVALITE). Variation in dislocation density induced by means of warm rolling at a series of temperatures below the discontinuous recrystallization temperature were expected to significantly affect the superplastic response by further grain size refinement. Experimental results indicate no beneficial enhancement in ductilities associated with rolling below 250 °C. Consistent elongations in the 400 percent range during this initial evaluation of the NAVALITE alloy indicates further investigation of superplastic response is warranted.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
61 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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