Abstract
The effects of concurrent precipitation on recrystallization are reviewed with special emphasis on dispersoid precipitation in non-heat treatable alloys. The isothermal annealing behavior of a supersaturated and deformed Al-Mn alloy is reported and analyzed in terms of a simple model. At low annealing temperatures, precipitation on the prior boundaries prevents recrystallization whereas at high temperatures, recrystallization is complete before precipitation occurs. In the temperature range 375-500°C, recrystallization is affected by precipitation, and complex microstructures containing high fractions of low-angle boundaries are formed. It is shown that large-scale strain induced boundary migration (SIBM) is a very important recrystallization mechanism in this temperature range.
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