| About this Abstract |
| Meeting |
2019 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2019)
|
| Symposium
|
2019 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2019)
|
| Presentation Title |
Fatigue Behavior of Laser Beam Directed Energy Deposited Inconel 718 at Elevated Temperature |
| Author(s) |
Alexander S Johnson, Rakish Shrestha, Pooriya Dastranjy Nezhadfar, Nima Shamsaei |
| On-Site Speaker (Planned) |
Rakish Shrestha |
| Abstract Scope |
Due to its superior mechanical properties at elevated service temperatures, nickel based super alloys such as Inconel 718 are being extensively used to manufacture turbine blades for jet engines. Furthermore, poor machinability associated with Inconel 718 also makes it an attractive material for additive manufacturing processes, which possess the capability to fabricate near net shaped parts. In this study, the fatigue behavior of Inconel 718 fabricated using laser beam directed energy deposition (LB-DED) is investigated under strain-controlled, fully-reversed conditions at an elevated temperature of 650°C. A thorough microstructural analysis was also conducted to determine the evolution of grain structure due to elevated test temperatures. In addition, fractography analysis was performed to determine the failure mechanisms for LB-DED Inconel 718 due to higher working temperatures. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |