| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Applications II
|
| Presentation Title |
Influence of Prior EBM Alloy 718 Microstructure on Build Properties after Varied Thermal Post-treatments |
| Author(s) |
Sneha Goel, Johannes Gårdstam, Jonas Olsson, Uta Klement, Shrikant Joshi |
| On-Site Speaker (Planned) |
Shrikant Joshi |
| Abstract Scope |
Additive manufacturing by electron beam melting (EBM) has gained rapid popularity for layer-by-layer fabrication of complexly shaped parts with difficult-to-machine materials. The workhorse superalloy Alloy 718, widely used in the aerospace industry for gas turbine applications, is one such material that has garnered significant attention for AM processing. Notwithstanding the considerable progress in improving AM processes, suitable thermal post-treatments involving heat treatment and/or hot isostatic pressing (HIP) are being sought to make AM-built parts suited for demanding applications. Consequently, the effect of post-treatments on microstructure and properties of EBM-built Alloy 718 needs to be understood. The presentation will focus on the response of EBM Alloy 718 builds with vastly varying as-built microstructures (equiaxed-columnar, dense-porous) to HIPing, solutionizing and aging. Illustrative results highlighting the influence of post-treatments on defect content, grain morphology/size, phase constitution, hardness, etc. will be presented, with particular emphasis on role of as-built microstructure on final part properties. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |