On the use of the cumulative strain energy density for fatigue life assessment in advanced high-strength steels

• Low-cycle fatigue behaviour of nine advanced high-strength steels is studied. Cumulative strain energy density applied as indicator parameter. can successfully assess life. In this paper, the applicability cumulative explored a parameter for subjected to strain-controlled conditions. Firstly, cyclic stress–strain responses steels, selected from three multiphase families, encompassing different elemental compositions and heat treatment routes, were Then, predictive capabilities proposed model compared with those other strain-based energy-based approaches. It was found that decreases amplitude increaes. also life be related via power function. addition, relationship between not significantly affected by composition or route. Finally, lives computed through concept close models but slightly more conservative.