| About this Abstract |
| Meeting |
3rd World Congress on High Entropy Alloys (HEA 2023)
|
| Symposium
|
HEA 2023
|
| Presentation Title |
Laser Shock Peening Surface Modification Effects on Microstructure and Oxidation Behavior of NbTiCoCrNi Refractory Complex Concentrated Alloys |
| Author(s) |
Ugochukwu Philip Ochieze, Ravi Kumar, Sravya Josyula, Abdulquadri Tobi Oriola, Matthew A. Steiner, Eric J. Payton |
| On-Site Speaker (Planned) |
Ugochukwu Philip Ochieze |
| Abstract Scope |
Refractory complex concentrated alloys, considered for applications in extreme environments, are known for their susceptibility to oxygen absorption during use. Most research has predominantly concentrated on their solid solution behavior at high temperatures, largely disregarding their transition through lower temperature regimes as they progress towards higher service temperatures. Furthermore, such investigations have frequently utilized arcmelted buttons, which may not accurately represent components prepared for deployment in extreme environmental conditions. To address these limitations, this study examines the impact of laser shock peening as a surface treatment process on as-cast NbTiCoCrNi alloys. The microstructure, both pre- and post-surface treatment, is extensively characterized through analytical electron microscopy and X-ray diffraction. The findings of this research aim to assess the influence of microstructure modification and the introduction of high near-surface compressive residual stresses on the oxidation behavior. Particular attention is given to temperatures where the presence of multiple phases in equilibrium is expected. |
| Proceedings Inclusion? |
Planned: Metallurgical and Materials Transactions |