|About this Abstract
||Materials Science & Technology 2019
||Corrosion of Additively Manufactured Metals
||High Temperature Oxidation of 718 Alloy Produced by Additive Manufacturing
||Tom Sanviemvongsak, Daniel Monceau
|On-Site Speaker (Planned)
Additive manufactured parts are now used in the hot section of aircraft gas turbines and their durability need to be assessed. The isothermal oxidation behavior at 850 °C of 718 alloys produced by Laser Beam Melting (LBM) and Electron Beam Melting (EBM), were compared to a conventional wrought 718 alloy. Results showed that AM 718 alloys presented higher mass gain kinetics compared to the wrought one. But a quantitative correlation of oxidation kinetics and surface topographies showed that they have similar isothermal oxidation resistance in terms of affected thicknesses. Nevertheless, quantitative analyses of the intergranular oxidation revealed that additive manufactured samples present slightly higher intergranular oxidation kinetics compared to the wrought alloy. These dissimilarities can be attributed to chemical composition, grain sizes or crystallographic textures differences.
||Definite: At-meeting proceedings