| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Influence of Selective Laser Melting Strategies and Post Treatment on the Residual Stresses and Microstructure of Alloy 718 |
| Author(s) |
Jan Capek, Efthymios Polatidis, Robert Pederson, Christophe Lyphout, Markus Strobl |
| On-Site Speaker (Planned) |
Jan Capek |
| Abstract Scope |
Selective Laser Melting (SLM) involves numerous building parameters and subsequently, numerous post-building treatment options that affect the geometrical integrity, surface quality, microstructure and mechanical behavior. SLM provides valuable prospects also for nickel-based superalloys that are used in many applications in aerospace or automotive, chemical and nuclear industry. However, the microstructure and mechanical properties of these materials are especially sensitive to building conditions and post-treatment, as they are susceptible to the formation of secondary phase precipitates.
Coin-shaped samples of Alloy 718 , were built with different SLM building strategies. Residual stresses in the bulk of the specimen were measured by neutron diffraction experiment at the POLDI instrument at the Paul Scherrer Institute. In addition, electron backscatter diffraction and energy-dispersive X-ray spectroscopy were used to investigate the effect of building conditions on the microstructure, crystallographic texture and chemical variations. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |