Fatigue lifetime of both plain and notched specimens made of additively manufactured AISI 316L

During last few years, the Additive Manufacturing (AM) technology has increasingly attracted the interest of both industries and researchers. In such a context, the present paper deals with the analysis of specimens made of additively manufactured AISI 316L stainless steel subjected to cyclic loading. More precisely, fatigue tests available in the literature and related to both plain and notched specimens are considered. The fatigue assessment of such specimens is performed by means of an analytical methodology, recently proposed by the present authors, consisting of the joint application of: a multiaxial stress-based fatigue criterion, named Carpinteri et al. criterion, which exploits the concept of the critical plane, and a stress averaging method, named Critical Direction Method, for the determination of the orientation of the critical plane. Satisfactory results are here obtained in terms of fatigue life for AM components, irrespective of both the specimen geometry and the degree of multiaxiality and non-proportionality.