Abstract

This research investigates the diverse thermal reactions of additively manufactured Inconel 718 samples under cyclic dynamic loading, predominantly influenced by the Self-Heating effect. The study assesses the feasibility of utilizing thermographic techniques to construct an S-N curve for predicting fatigue life with a reduced number of samples compared to conventional constant-amplitude tests. Dedicated Self-Heating tests are performed, systematically elevating the loading amplitude while concurrently tracking the specimen's temperature. The credibility of the proposed solution is juxtaposed with our experimental data, encompassing the influence of four distinct heat treatments on samples from a single additive manufacturing build. This comparison yields valuable insights and leads to noteworthy conclusions.