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Precipitation, recovery and recrystallization under static and dynamic conditions for high magnesium aluminum-magnesium alloys

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Author
Chesterman, Charles Wesley
Date
1980-03
Advisor
McNelley, T.R.
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Abstract
Previous studies of the mechanical behavior of warm rolled high magnesium aluminum-magnesium alloys have shown that excellent tensile properties can be developed in these materials. Several questions raised in these previous efforts regarding recrystallization and precipitation of the intermetallic 3 phase are addressed in this thesis. It is shown that, for temperatures T < T (where T is the solvus temperature) the only microstructural change is the precipitation of the 3 phase and no recrystallization occurs, even with prior cold work. Further studies of microstructures developed during warm working, with and without prior cold work, also indicate that precipitation and recovery dominate the microstructural changes in warm rolling at temperatures below the solvus for the alloy. Recrystallization will occur readily, but only at temperature in excess of the solvus. Strengthening by warm working, then, occurs by mechanisms similar to cold work strengthening in solid solution alloys.
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http://hdl.handle.net/10945/19012
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  • 1. Thesis and Dissertation Collection, all items

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

    Johnson, Ralph Brian (Monterey, California. Naval Postgraduate School, 1980-06);
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    The Influence of Thermomechanical Processing Variables on Superplasticity in a High-Mg, Al-Mg Alloy 

    Lee, E.W.; McNelley, T.R.; Stengel, A.F. (1986-06);
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    The use of backscattered electron imaging mode to assess the effect of fine dispersions on development of superplastic microstructures in Al-Mg alloys 

    Coleman, Michael Thomas. (Monterey, California. Naval Postgraduate School, 1993-06);
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