A modified energy-based low cycle fatigue model for eutectic solder alloy

Low cycle fatigue testing of a eutectic alloy 63Sn/37Pb was carrier out over a wide range of frequencies and temperatures with total strain set at different values. The fatigue life was observed to decrease with decreasing frequency or increasing total strain, and it was also observed to decrease with increasing test temperature although the temperature dependence was relatively small. The Morrow energy-based model, the frequency-modified Coffin-Manson model, and the frequency-modified energy-based model by Solomon were examined. The new fatigue model was found to be able to predict the fatigue life at different frequencies and temperatures.