Abstract
Refractory high-entropy alloys (RHEAs) are an emerging group of materials exhibiting interesting functional and structural properties under high-temperature operations. In this work, MoNbZrTiV RHEA particles were developed via high-energy mechanical alloying, employing sequential and conventional milling approaches. Microstructural analysis was done through scanning electron microscopy, and the corresponding energy-dispersive X-ray spectroscopy confirmed the successful formation of the alloy. Results showed that as the milling progressed, dissolution of the elements and homogenization of the alloy were greatly governed by the physical properties of the elements. Thermodynamic calculations predicted the formation of a solid solution with a body-centered cubic (BCC) crystal structure. The reduced particle size after 24 h of milling was mainly due to the brittle nature of the elements having BCC and hexagonal close-packed (HCP) crystal structures, in addition to strain hardening and the frequent tendency of fracturing than cold welding during milling.
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Acknowledgements
The authors would like to acknowledge with gratitude the Natural Sciences and Engineering Research Council of Canada (NSERC), the Canada Foundation for Innovation (CFI), Transport Canada, the Atlantic Canada Opportunities Agency (ACOA), and the New Brunswick Innovation Foundation (NBIF) for funding this research endeavor.
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Tolentino, M.S., Custodio, A.G.D., Saha, G.C., Aranas, C. (2024). Microstructural Analysis of MoNbZrTiV Refractory High-Entropy Alloy Developed via High-Energy Mechanical Alloying. In: TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50349-8_57
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