Study on Microstructure and Properties of Aged Cu-Ti-Zr-RE Alloy
Electrical conductivity, tensile strength and micro-hardness of Cu-3.5wt.%Ti-0.1wt.%Zr-RE alloy were investigated after optimizing technics of plastic deformation and the heat treatment. The results show that good combination of the physical and mechanical properties, such as tensile strength 1160 MPa, micro-hardness 335 Hv and electrical conductivity 15 IACS% can be obtained on peak aging at 420°C for 7 h. Maximum strength was associated with the precipitation of metastable, ordered and coherent β/ (Cu4Ti) phase on peak aging. Then the strength decreased due to the precipitation of β (Cu3Ti) phase in alloys overaged.
Yansheng Yin and Xin Wang
X. M. Cao et al., "Study on Microstructure and Properties of Aged Cu-Ti-Zr-RE Alloy", Advanced Materials Research, Vols. 79-82, pp. 1687-1690, 2009