|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
||High Cycle Fatigue Behavior of Additively Manufactured Thin Wall Inconel 718 (Dependence on Thickness and HIP)
||Paul Paradise, Anushree Saxena, Andrew Sarrasin, Nikki Van Handel, Dhruv Bhate
|On-Site Speaker (Planned)
Additively Manufactured Thin-wall Inconel 718 specimens commonly find application in heat exchangers and Thermal Protection Systems (TPS) for space vehicles. The wall thicknesses in applications for these components typically range between 0.03-2.5mm. This study aims at investigating the dependence of High Cycle Fatigue (HCF) behavior on wall thickness and Hot Isostatic Pressing (HIP) for as-built Additively Manufactured Thin Wall Inconel 718 alloys. To address this, High Cycle Fatigue Tests were performed on specimens of seven different thickness (0.3mm, 0.35mm, 0.5mm, 0.75mm, 1mm, 1.5mm and 2mm) using a Fatigue Testing Machine. Only half of the specimen underwent HIP, creating data for both HIP and No-HIP specimens. Upon analyzing the collected data, it was noticed that presence of Porosity in No-HIP specimens make them more sensitive to changes in stress. A clear decrease in fatigue strength with decrease in thickness was observed for all specimens.
||Additive Manufacturing, Mechanical Properties, Characterization