Multiaxial Fatigue Analysis of Additively Manufactured 17-4 PH Stainless Steel Notched Specimens

Direct Metal Laser Sintering (DMLS) offers economically production of customized components with complex geometries in a shorter design-to-manufacture cycle. Similar to other Additive Manufacturing (AM) techniques, this method is used for production of complex geometries which include various kinds of notch geometries. However, the basic understanding of the fatigue behavior of the notched specimens produced with AM techniques must be substantially improved before the unique features of this rapidly developing technology can be used in critical load bearing applications. The axial and torsional fatigue behavior of severely notched components made of additively manufactured 17-4 PH stainless steel has been studied in the present paper. The experimental fatigue tests have been performed under axial and torsional loading conditions. Cylindrical specimens with notch tip radius of 0.1 mm were employed to evaluate the fatigue behavior of the specimens under different loading conditions.