Abstract
The effect of rolling conditions on the strength and microstructure of alumina dispersed copper strips was investigated. Commercial strips, Glidcop Al-25, were rolled to similar total reductions by one or multiple passes at room temperature or at 540°C. The specimens rolled at room temperature (cold rolled specimens) had higher strength and hardness than those rolled at 540°C (warm rolled specimen), when rolling schedules were the same. The strength and hardness of the cold rolled specimens were little influenced by the number of rolling passes, whereas the multi-pass warm rolled specimen had lower strength and hardness and higher elongation than the single-pass warm rolled specimen. The structure of specimens is characterized by banded substructures and their strength could be expressed as a function of the band size. In warm rolled strips, no dynamic recrystallization occurred, but the band growth was observed.
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