| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Effect of In-Situ Heating and Post-Processing on the Microstructure and Mechanical Properties of IN718 Produced by LPBF |
| Author(s) |
Ala Qattawi |
| On-Site Speaker (Planned) |
Ala Qattawi |
| Abstract Scope |
In the presented work,the effect of in-situ heating and post-processing on the microstructure and mechanical properties of IN718 produced by heat-assisted Laser Powder Bed Fusion (LPBF) is investigated. The results indicated in-situ heating during the LPBF process could help reduce residual stresses and refine the microstructure in IN718 by promoting more uniform grain growth and reducing the formation of undesirable phases. In-situ heating enhanced mechanical properties, such as increased tensile strength and improved fatigue resistance. Post-processing treatments, such as heat treatment and hot isostatic pressing (HIP), were further applied to optimize the microstructure on IN718 samples by dissolving micro segregations, closing internal porosities, and promoting the precipitation of strengthening phases like γ' and γ''. The in-situ heating during LPBF fabrication has collectively enhanced the mechanical performance of IN718 and achieved comparable results to IN718 samples after HIP treatment. |