| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
Optimization of Post-built Annealing of Ni Alloy718 Processed by Powder Bed Fusion |
| Author(s) |
Jan Capek, Efthymios Polatidis, Magnus Niekter, Joe Kelleher, Nicola Casati, Markus Strobl |
| On-Site Speaker (Planned) |
Jan Capek |
| Abstract Scope |
Laser powder bed fusion provides valuable prospects for nickel-based superalloys that are used in many applications. However, the microstructure and mechanical properties of these materials are especially sensitive to the manufacturing conditions and post-treatments that are applied to relieve the internal stresses, as they are susceptible to the formation of different types of precipitates, depending on the alloy chemistry, temperature and time.
A combination of in situ high-temperature neutron diffraction and synchrotron X-ray diffraction was used to study the evolution of the residual stresses and precipitation in nickel based Alloy 718 for a temperature range from 600°C to 1000°C. Using the Engin-X beamline, ISIS UK, it was possible to follow the evolution of residual stresses. X-Ray diffraction data was used to evaluate the initial phase composition and its evolution during the annealing. These results allow for the optimization of one-step annealing treatments to relieve residual stresses and control the microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Phase Transformations |