Effect of aluminum on microstructure and property of Cu–Ni–Si alloys

The effect of aluminum on the microstructure and properties of Cu–Ni–Si alloys has been investigated using hardness test, electrical conductivity measurement, optical microscopy, X-ray diffraction analysis, scanning electron microscopy and transmission electron microscopy. Compared with Cu–Ni–Si alloy, Cu–Ni–Si–Al alloy had finer grains. After homogenization treatment at 940 °C for 4 h, hot rolling by 80% at 850 °C, solution treatment at 970 °C...