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Recent progress in high-entropy alloys
Abstract
Progres recents dans les alliages a haute entropie. La trentaine de systemes d'alliages actuellement d'utilisation courante sont typiquement bases sur un ou, au plus, deux elements. On considerait que des alliages constitues d'un plus grand nombre d'elements principaux formeraient des microstructures compliquees et fragiles, et la recherche sur de tels alliages multielementaires a donc ete tres limitee. Cependant, en 1995, Yeh a suggere que les systemes d'alliages formes d'au moins cinq elements metalliques possedaient des entropies de melange elevees et favoriseraient donc la formation de solutions solides multielementaires, par opposition aux supposees structures complexes formees de nombreux composes intermetalliques. Les travaux effectues au cours de la derniere decennie sur de tels alliages multielementaires, denommes de facon appropriee « alliages a haute entropie » (AHE), ont en effet montre que ces derniers formaient des phases simples a structures nanocristallines et meme amorphes. Outre l'effet de haute entropie, ces caracteristiques structurales ont ete attribuees a l'existence dans ces melanges multielementaires de fortes distorsions de reseau et d'une diffusion ralentie. En fonction de leur composition et du procede d'elaboration, il s'est avere que les AHE presentaient un large spectre de microstructures et de proprietes. Les proprietes superieures de certains AHE par rapport aux alliages classiques, ainsi que le nombre enorme de combinaisons possibles susceptibles de conduire a des phenomenes nouveaux et a des applications fonctionnelles, font que ces AHE presentent un grand interet non seulement du point de vue de la recherche mais aussi pour de nombreuses applications industrielles. Dans cette perspective, cet article passe en revue les progres recents dans les AHE et les orientations futures.
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Citations
Cited by
Effect of valence electron concentration on stability of fcc or bcc phase in high entropy alloys
Guo, S., Ng, C., Lu, J., & Liu, C. T. (2011) · Journal of Applied Physics · doi:10.1063/1.3587228 · Cited by 2,911
Sluggish diffusion in Co–Cr–Fe–Mn–Ni high-entropy alloys
Tsai, K.-Y., Tsai, M.-H., & Yeh, J.-W. (2013) · Acta Materialia · doi:10.1016/j.actamat.2013.04.058 · Cited by 2,366
Self-citationOses, C., Toher, C., & Curtarolo, S. (2020) · Nature Reviews Materials · doi:10.1038/s41578-019-0170-8 · Cited by 2,081
High-entropy energy materials: challenges and new opportunities
Ma, Y., Ma, Y., Wang, Q., Schweidler, S., Botros, M., Fu, T., Hahn, H., Brezesinski, T., & Breitung, B. (2021) · Energy & Environmental Science · doi:10.1039/d1ee00505g · Cited by 963
Grain growth and the Hall–Petch relationship in a high-entropy FeCrNiCoMn alloy
Liu, W. H., Wu, Y., He, J. Y., Nieh, T. G., & Lu, Z. P. (2013) · Scripta Materialia · doi:10.1016/j.scriptamat.2012.12.002 · Cited by 916
Metadata
- Authors
- Yeh, J.-W.
- Venue
- Annales de Chimie Science des Matériaux
- Published
- 2006-12-31
- Volume
- 31
- Issue
- 6
- Pages
- 633-648
- ISSN
- 0947-3580 (ISSN-L)
- OpenAlex
- W2007115257
- Cited by
- 2,117
- References
- 0
- FWCI
- 16.37
- Type
- journal article
- Language
- fr
- Open access
- closed
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