| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Surface-roughness Effects on Oxidation Rate at High Temperatures in Ni-based Single-crystal Superalloys |
| Author(s) |
Aidan J. O'Donnell, Jean Briac Le-Graverend |
| On-Site Speaker (Planned) |
Aidan J. O'Donnell |
| Abstract Scope |
It is already known that surface roughness has a tremendous effect on fatigue, but there is also an effect on oxidation kinetics. Ni-based single-crystal samples with different surface roughness ranging from 0.09 to 2.5 microns were tested at 1050C in a thermogravimetric analyzer (TGA) for 100h. it was revealed that the oxidation kinetics depends on the surface roughness in a non-linear manner, which was attributed to a coupling between the oxidizing molecule size and the surface profile. Since last time we have determined the effect of the added plasticity to the samples on the oxidation rate along with recreating the whole range with just mechanically produced surface roughness. This new plot also allows a better understanding of the effect of the Chemically etched roughness on the overall oxidation rate. |
| Proceedings Inclusion? |
Planned: |