Cyclic stress–strain behavior and low cycle fatigue life of cast A356 alloys

The cyclic stress–strain behavior and the low cycle fatigue life of electrolytic A356 alloys with different Ti contents were investigated, and the corresponding properties of melting A356 alloys were also considered as a comparison. All alloys exhibited the cyclic hardening behavior, and raising Ti could increase the cyclic hardening ability. The fatigue life was mainly controlled not by the Ti-addition method but by the Ti content. Interestingly, the low yield stress and high plastic strain energy consumed during the cyclic deformation, the alloys with 0.10% Ti possessed the longer fatigue life compared to those alloys with 0.14% Ti.