Additive manufacturing (AM), and in particular the laser-powder bed fusion (L- PBF) process, has been analysed by academia, agencies, and industry for more than two decades.

It has been recognized that the typical scatter of fatigue properties of AM materials [1] is due to the dependence of fatigue properties on the size of defects/inhomogeneities [2] . It follows that the fatigue life is strongly dependent on the position, shape and size of the so-called the killer defect [3] and it is the key ingredient for the application of for a robust assessment of components. The presentation will first deal with the concepts for a fracture-based assessment and its application to different materials [4].

References
[1] S. Beretta, S. Romano, Int. J. Fatigue, 2017, 94, 178-191.
[2] S. Romano et al. , Eng. Fracture Mechanics, 2018, 187, 165-189.
[3] A. du Plessis, S. Beretta, Additive Manufacturing, 2020, 35, 101424.
[4] S. Romano, S. Miccoli, S. Beretta, Int. J. Fatigue, 2019, 125, 324-341.