|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Environmental Degradation of Additively Manufactured Alloys
|The Effect of Hydrogen Embrittlement on Additively Manufactured IN718 in Dependency of the Delta Phase Volume Fraction
|Andreas Kirchmayer, Jan-Oliver Hücking, Felfer Peter, Mathias Göken, Steffen Neumeier
|On-Site Speaker (Planned)
To realize the change in mobility needed to achieve the environmental goals set by governments all around the world, new means of resource-saving production as well as a new energy carrier is needed. Additive manufacturing and hydrogen as fuel in jet engines can contribute to solve both these problems for the aerospace sector. This work aims to analyze the influence of hydrogen embrittlement on the Ni-based superalloy IN718 manufactured by selective laser melting (SLM) using electrochemical hydrogen charging and subsequent tensile tests. By applying different heat treatments, the morphology as well as the amount of the high temperature delta phase can be changed. It is shown, that an increase in delta volume fraction leads to stronger hydrogen damage, as one of the main reasons for hydrogen embrittlement is the delamination around delta precipitates. To validate any effect stemming from the SLM process, the results are compared to conventional forged IN718.
|Additive Manufacturing, High-Temperature Materials, Other