|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture III
||Tensile, Creep and LCF Behavior of SLM Fabricated Inconel 718 in As-fabricated and HIPed Conditions
||Sasidharan Periane, Arnaud Duchosal, Sébastien Vaudreuil, Hicham Chibane, Jonathan CORMIER, Rene Leroy
|On-Site Speaker (Planned)
The objective of this study is to evaluate the influence of the porosity, residual stress and precipitates strengthening in as-fabricated and Hiped specimens compared to conventional (i.e. thermomechanically processed) alloy 718. The as-fabricated sample has fine columnar dendrites due to directional solidification and has around 50 % less hardness value compared to that of cast & wrought (C&W) 718.
Tensile, creep and low cycle fatigue tests have been performed to investigate the durability and failure mechanisms in SLM processed 718 specimens with and without HIPing and compared to the conventionally processed alloy 718. As-fabricated specimens have inferior tensile properties while the elongation is similar to that of C&W 718 and HIPed samples. Fatigue crack initiation mechanisms will be compared between each processing route. Some guidelines will be proposed on how AM 718 specimens can reach mechanical properties alloy 718 processed by the C&W route (e.g. for engine disks manufacturing).
||Planned: Supplemental Proceedings volume