Table 1.
Comparison of the yield strength, σy, the ultimate tensile strength, σUTS, and ductility related values of UFG and CG copper. As a measure of the ductility the uniform elongation, ɛun, the elongation at fracture, ɛfr, and the reduction in area, Z, were evaluated. All numbers are mean values of 3 tests and as an error the standard deviation is specified.
| Microstructure | σy (MPa) | σUTS (MPa) | ɛun (%) | ɛfra (%) | Z (%) |
|---|---|---|---|---|---|
| UFG-Cu | 443 ± 21 | 601 ± 12 | 3.0 ± 0.3 | 18.3 ± 1.7 | 75.3 ± 4.2 |
| CG-Cu | 111 ± 12 | 179 ± 9 | 31.8 ± 3.4 | 49.4 ± 6.0 | 89.4 ± 2.2 |