The Phase Competition and Stability of High-Entropy Alloys View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2014-08-29

AUTHORS

W. H. Liu, Y. Wu, J. Y. He, Y. Zhang, C. T. Liu, Z. P. Lu

ABSTRACT

Phase competition and stability of several typical high-entropy alloys (HEAs) were studied, and the effects of alloying additions and processing conditions on phase formation in these alloys were discussed. Alloying with chemically incompatible elements having a large difference in either the atomic size or enthalpy of mixing with constituting components in HEAs, e.g., Cu and Al in the FeCoNiCr alloy system, inevitably induced phase separation and stimulated formation of duplex solid-solution phases and even intermetallic compounds. The solid-solution phase in the as-cast FeCoNiCrMn HEA is extremely stable due to the good chemical compatibility among constituent components, but in the FeCoNiCrAl and (FeCoNiCrAl)99Si1 HEAs with the incompatible elements Al and Si, pretreatment and annealing processes could induce phase transitions and the formation of new phases, indicating that the as-cast solid-solution phases were destabilized by quenched-in chemical segregation, resulting from additions of the dissimilar elements. More... »

PAGES

1973-1983

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11837-014-1119-4

DOI

http://dx.doi.org/10.1007/s11837-014-1119-4

DIMENSIONS

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