| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Alternative Processes (Beyond the Beam)
|
| Presentation Title |
A-44: Surface Characterization of IN718 Powder Stock and Influence on Net-shape HIP Microstructure |
| Author(s) |
Benjamin Georgin, Victor Samarov, Hamish Fraser |
| On-Site Speaker (Planned) |
Benjamin Georgin |
| Abstract Scope |
Net-shape hot isostatic pressing (HIP) is a promising manufacturing route for highly alloyed materials such as Ni-base alloys which are difficult to conventionally process. The application and performance of net-shape HIP components has been limited by characteristics of prior particle boundary (PPB) networks. These form as a direct result of oxygen contamination of powder stock which is highly dependent on the atomization processes and powder storage conditions. Clean atomization processes such as plasma rotating electrode process (PREP) minimize oxygen contamination. Oxygen is present both in the bulk and on the surface of the powders. In alloy 718, a nanoscale oxide layer forms on the powder surface due to the high concentration of oxide forming elements present. This study provides an in-depth characterization of surface oxidation of powder stock as well as the effect of powder size distribution (PSD) on PPB networks and microstructure in net-shape HIP components. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |