| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Mechanisms and Mitigation of Aqueous Corrosion and High-temperature Oxidation
|
| Presentation Title |
Performance Evaluation of Oxidized Inconel 625 Made by Laser-assisted Additive Manufacturing |
| Author(s) |
Grace Vanessa De Leon Nope, Juan Manuel Alvarado-Orozco, Guofeng Wang, Brian Gleeson |
| On-Site Speaker (Planned) |
Grace Vanessa De Leon Nope |
| Abstract Scope |
Inconel 625 (IN625) fabricated by additive manufacturing (AM) processes can exhibit pronounced niobium and molybdenum segregation in comparison to its wrought counterpart. Such a result can impact chromia-scale establishment behavior and subsurface microstructure evolution during high temperature exposures. This study focuses on evaluating the oxidation resistance and associated fatigue performance of IN625, comparing wrought and two AM processes (laser powder bed fusion and direct energy deposition). The results show that during high-temperature oxidation, the manufacturing process affects the amount of delta phase formation beneath the chromia scale as well as the internal attack depth and composition. The contributions of these subsurface features on fatigue crack initiation and growth are assessed. Elucidating the relationships between AM microstructure and crack growth will aid in advancing AM part design. |