About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Environmental Degradation of Multiple Principal Component Materials
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Presentation Title |
Investigation of microstructure and irradiation effects in MoNbTi refractory high entropy alloys |
Author(s) |
Kara Krogh, Saikumaran Ayyappan, Geoffrey Beausoleil, Djamel Kaoumi |
On-Site Speaker (Planned) |
Kara Krogh |
Abstract Scope |
Refractory multi-principal element alloys (RMPEAs) were developed with a combination of elements. This work compares the radiation behavior of MoNbTi base alloys with additions of Zr, V and Cr prepared through spark plasma sintering (SPS) followed by Kr+ ion irradiation up to 10 dpa done in-situ in a TEM at 25C and 300C. Empirical parameters including atomic size difference, entropy and enthalpy of mixing were calculated to predict the alloy microstructures. With alloying additions, different microstructures as BCC, HCP, Mo rich and V-Zr rich phases were observed which behaved differently under irradiation. The stability of twin boundaries was observed to depend on the composition of the host structure. Amorphization occurred within the V-Zr rich phase after V addition. Cavities were observed in the Mo-rich phases. Thus, this work showcases the effect that different alloying additions have on the microstructure and in turn the radiation behavior of RMPEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Nuclear Materials, |