Fatigue strengths of Cu–Be alloy with high tensile strengths

The fatigue strength of Cu–Be alloy with tensile strength ranging from 500 to 1300 MPa was optimized by different treatments. The experimental results demonstrate that the optimum fatigue strength of the Cu–Be alloy at 107 cycles is 323 MPa, which does not correspond to the material state with the highest tensile strength. It is indicated that improving the tensile strength cannot always achieve the optimum fatigue strength. The relations between fatigue strength and other mechanical properties are discussed.