Research Article
Microstructure and Conductivity of the Al-Cu Joint Processed by Friction Stir Welding
Table 3
The hardness and resistivity of Al, Cu, and intermetallic compounds.
| | Phase | x (Cu)% | Hardness (kg·mm−2) | Resistivity (Ω·m) |
| | Cu | 100 | 90 | 1.75 × 10−8 | | Cu9Al4 | 62.5–69 | 287 | 14.2 × 10−8 | | Cu3Al2 | 62.5–69 | 557 | 13.4 × 10−8 | | Cu4Al3 | 55.2–56.3 | 852 | 12.2 × 10−8 | | CuAl | 49.8–52.2 | 1174 | 11.4 × 10−8 | | CuAl2 | 31.9–33.0 | 735 | 8.0 × 10−8 | | Al | 0 | 40 | 2.83 × 10−8 |
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