| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Testing to Understand the Long Term Performance of High Temperature Materials
|
| Presentation Title |
Surface-roughness Effects on Creep Performance 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 |
Single crystal alloys operate at high temperatures with their performance in overall lifetime affected by creep, fatigue, and oxidation effects. Surface roughness is already well known to affect fatigue performance. The authors also demonstrated the non-linear effect of surface roughness on oxidation rate during TGA analyses. This is why the effect of surface roughness on creep performance (amplitude of the primary creep, secondary creep rate, lifetime, and ductility) is hereby investigated. The temperature/stress condition studied is 1000°C/230 MPa. All the samples are polished for 2h to remove stress-induced machining and then polished to reach the targeted surface roughness. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, |