Abstract
The effect of temperature on the rolling behavior of ultrafine-grained Cu and Cu-alloys with different stacking fault energies (SFEs) is reported. The strength and ductility of the materials increase simultaneously with SFE decreasing by liquid nitrogen temperature (LNT) rolling and room temperature (RT) rolling. Compared with RT-rolled samples with the same low SFE, LNT-rolled ones have a higher strength and better ductility. X-ray diffraction measurements indicate that decreasing SFE leads to a decrease in the average grain size and a concomitant increase in twin density. Special attention should be paid that it is more evident in the LNT-rolled samples. The results show that temperature plays a key role in the rolling process.
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