| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond IV
|
| Presentation Title |
Effect of Surface Microstructure Modification on the Oxidation Behavior of a TaTiCr RMPEA |
| Author(s) |
Noah J. Welch, Maria Jose Quintana, Todd M Butler, Peter Chancellor Collins |
| On-Site Speaker (Planned) |
Noah J. Welch |
| Abstract Scope |
Some Refractory Multi-Principal Element Alloys (RMPEAs) have been shown to exhibit favorable oxidation resistance at high temperatures (>1000°C) due to the formation of complex oxides and suppression of simple, deleterious oxides. However, the influence of microstructure has not been explored extensively in the concentrated alloy space and could potentially improve oxidation performance substantially due to increased diffusion pathways, etc. This work explores a novel technique for subsurface microstructure modification in RMPEAs using laser shock peening (LSP) followed by systematic heat treatments to control surface grain size and precipitate size. The specimens were then placed in box furnaces in air for 24 h at 1200°C for oxidation testing. Oxide scale thickness and internal reaction depth were measured under each condition in addition to the characterization of reaction products. Oxidation performance is then discussed with respect to microstructure morphology and diffusion effects. |