| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Impact of Surface Texture and Temperature on the Low Cycle Fatigue Life of Laser Powder Bed Fusion GRCop-42 |
| Author(s) |
Gabriel Demeneghi, Paul Gradl, Agustin Diaz, Kavan Hazeli |
| On-Site Speaker (Planned) |
Gabriel Demeneghi |
| Abstract Scope |
GRCop-42 (Cu – 4at%Cr – 2at%Nb) is a specialized alloy developed by NASA Glenn research center to be used in high heat flux applications, such as rocket engine combustion chambers. The extreme operating conditions of combustion chambers, characterized by both cryogenic and elevated temperatures, subject constrained components to significant strains due to the thermal expansion, resembling low cycle thermal fatigue conditions. Furthermore, the intricate design of combustion chambers limits what surface finishes can be applied to these components. This presentation shows the impact that three distinct surface finishes (as-printed, machined, and polished) and different strains have on the low cycle fatigue life of GRCop-42. Additionally, the thermal fatigue conditions are closely replicated by conducting the fatigue test at operating temperatures with equivalent strains. The objective is to bridge the knowledge gaps by investigating the influence of surface finishes and temperature on the low cycle fatigue life of GRCop-42. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Mechanical Properties |