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

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Author
Chesterman, Charles Wesley
Date
1980-03Advisor
McNelley, T.R.
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Show full item recordAbstract
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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