The age hardening response of thermomechanically processed Al-Mg-Li alloys
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Authors
Ferris, William F.
Subjects
Aluminum-magnesium-lithium alloys
Thermomechanically processed for superplasticity
Age hardening studies
Thermomechanically processed for superplasticity
Age hardening studies
Advisors
McNelley, Terry R.
Hales, Stephen J.
Date of Issue
1987-12
Date
December 1987
Publisher
Language
en_US
Abstract
Four Al-Mg-Li alloys of compositions (weight percent) in the ranges of 6-8% Mg, 0.5-2% Li and 0.15-0.25% Zr were hot forged and warm rolled (thermo-mechanically processed) to achieve a microstructure suitable for superplasticity. They were then subjected to age-hardening studies at temperatures indicated by concurrent differential scanning calorimetry research. Optical and transmission electron microscopy techniques were used to relate microstructure to mechanical properties. Only the 6%Mg-2%Li alloy showed significant age hardening response, however, concurrent research demonstrated excellent superplastic response in the 6%Mg-1%Li and 8%Mg-1%Li alloys.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
84 p.
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.