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

摘要

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.