| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Fundamental Investigation of Fatigue Behavior in Microstructurally-stable Nanocrystalline Cu-Ta Alloys |
| Author(s) |
Anqi Yu, Christian Roach, Khalid Hattar, Kiran Solanki, Suveen Mathaudhu |
| On-Site Speaker (Planned) |
Anqi Yu |
| Abstract Scope |
There has been growing research interest in nanocrystalline (NC) materials because of their superior mechanical properties compared to their coarse-grained counterparts. However, there are very few studies on the fatigue behavior of NC alloys due to their observed microstructural instabilities, such as grain growth during fatigue. Fortunately, experiments and simulations have shown that Cu-Ta alloys can retain NC grains under thermo-mechanical loading conditions. The microstructural stability is attributed to Zener pinning; more specifically, Ta nanoclusters provide a pinning pressure against the driving force of grain boundary movement. In this project, NC Cu-Ta alloys (Cu-1, 3, 5 & 10Ta, at.%) with microstructures resistant to grain growth are fabricated by cryomilling and consolidated by spark plasma sintering. Cyclic mechanical testing is performed to measure the fatigue behavior. Finally, microstructural changes and their role on fatigue behavior in microstructurally-stable nanocrystalline Cu-Ta alloys are probed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |