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Examine the following microstructures of annealed cartridge brass (70Cu-30Zn) at different temperature. a) Annealed Brass + 50% Cold work +recrystallized at 450C for 60 minutes

Examine the following microstructures of annealed cartridge brass (70Cu-30Zn) at different temperature.image text in transcribed

a) Annealed Brass + 50% Cold work +recrystallized at 450C for 60 minutes b) Annealed Brass + 50% Cold work +recrystallized at 550C for 60 minutes (a) (b) c) Explain why the grain size is larger in the sample annealed at higher temperature. d) Which one of the recrystillized samples above have higher strength? Why

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