About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
Presentation Title |
A-92: Creep Deformation Study of Heat-treated Nickel Alloy 718 |
Author(s) |
Alejandro Hinojos, Hyeyun Song, Alber Sadek, Wei Zhang, Michael Mills |
On-Site Speaker (Planned) |
Alejandro Hinojos |
Abstract Scope |
Additive manufacturing (AM) has rapidly become integrated in the aerospace sector over the past decade. Research thrusts in the past have focused on suppressing the unorthodox microstructures through process parameter control. However, it is not yet understood whether these unique microstructures could be exploited as precursor templates to enhance the creep properties of alloys in high temperature applications. In this study, Inconel 718 (IN718) was fabricated through selective laser melting (SLM) for the analysis of single step aging heat treatments at 720 and 680°C for 10 hours. Monotonic compression creep tests were performed at 649°C and 700MPa. Preliminary testing has shown that the single step heat-treated condition had substantially better creep rates and strain than the conventionally processed alloy. Ensuing scanning electron microscopy and transmission electron microscopy was performed to evaluate the role of the AM microstructures in creep deformation in the as-fabricated and heat-treated conditions. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |