About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture
|
| Presentation Title |
Effect of Post-heat Treatment on IN718 Alloy Fabricated Using Three Different Additive Manufacturing (AM) Routes |
| Author(s) |
Adya Charan Arohi, Kartikey Sharma, Yerra Shashi Kumar, Balila Nagamani Jaya |
| On-Site Speaker (Planned) |
Balila Nagamani Jaya |
| Abstract Scope |
IN718 superalloy fabricated via direct energy deposition (DED), selective laser melting (SLM), and electron beam melting (EBM) techniques exhibits process-dependent microstructures. As-built (AB) DED and SLM specimens reveal fine cellular dendritic structures with average cellular sizes of ~2.5 µm and ~0.5 µm, respectivelyand γ’’ precipitates. In contrast, EBM specimen give rise to columnar grains with a large fraction of γ’’. All three contain Laves phase and NbC precipitates. These microstructural differences alter the mechanical properties, with ultimate tensile strength exhibiting an increasing trend from DED (~893 MPa) to SLM (~1030 MPa) to EBM (~1333 MPa) conditions. Each manufacturing process is subsequently subjected to a different post-processing treatments to exploit the characteristics that benefit the mechanical response and to eliminate the undesirable phases. The resulting microstructure, tensile response and fatigue response at room and elevated temperatures are presented. Overall, the study generates a comprehensive processing-structure-property for IN718 superalloy fabricated via different AM techniques. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |