Abstract: The advent of additive manufacturing processes and their growth has thrown new challenges for engineering. The need of the hour is to quickly characterise the behaviour and properties of parts manufactured by this atypical process. This study aims at understanding the fatigue behavior of 3D printed 15-5 PH stainless steel vis-à-vis conventionally wrought material. The standard rotating bending test specimen are printed by the process of Direct metal laser sintering (DMLS). The parts are printed with different orientation and some specimens have periodic porosity to understand the effect of porosity on fatigue life. A micrograph analysis will follow to completely understand the crack propagation behaviour in a 3D printed metallic part. The fatigue life estimates are then compared with suitable finite element model.
Authors: Anudeep Padmanabhan and Jing Zhang
Keywords: Fatigue analysis, Additive manufacturing, Finite element analysis