On the bilinearity of the Coffin-Manson low-cycle fatigue relationship

Some alloy systems such as aluminum-lithium alloys and dual-phase steels have been found to show a bilinear Coffin-Manson low-cycle fatigue relationship. In this paper it is shown that such a bilinear behaviour depends on the relationship between the elastic and the inelastic strain ranges and can be expected in those materials where the elastic strain range is more dominant than the inelastic strain range in the life span. © 1992.