Body-centered cubic phase stability in cobalt-free refractory high-entropy alloys

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dc.contributor.authorLi, Y.
dc.contributor.authorKurpaska, Ł.
dc.contributor.authorLu, E.
dc.contributor.authorXie, Z.
dc.contributor.authorKim, H.S.
dc.contributor.authorHuo, W.
dc.date.issued2024
dc.description.abstractCobalt-free refractory high-entropy alloys (RHEAs) are strong contenders for structural materials in nuclear reactors because they do not exhibit cobalt activity under irradiation. The mechanical properties and thermal stability of RHEAs are primarily attributed to the solid solution phase, which is essentially the body-centered cubic (BCC) phase. The BCC phase formation rules thus became the basic criterion in the compositional design of RHEAs. In this paper, the BCC phase formation rules in cobalt-free RHEAs were determined via the calculation of six semiempirical parameters, namely, the entropy of mixing, enthalpy of mixing, atomic size difference, Ω-parameter, d-orbital energy level and valance electron concentration. The mixing enthalpy and atomic size differences are more effective than other semiempirical parameters for predicting BCC phase stability in cobalt-free RHEAs. The presence of aluminum is found to cause a notable alteration in the range of phase stability in cobalt-free RHEAs.
dc.description.statementofresponsibilityYulin Li, Łukasz Kurpaska, Eryang Lu, Zonghan Xie, Hyoung Seop Kim, Wenyi Huo
dc.identifier.citationResults in Physics, 2024; 60:107688-1-107688-13
dc.identifier.doi10.1016/j.rinp.2024.107688
dc.identifier.issn2211-3797
dc.identifier.issn2211-3797
dc.identifier.urihttps://hdl.handle.net/2440/148003
dc.language.isoen
dc.publisherElsevier
dc.relation.grantARC
dc.rights© 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
dc.source.urihttps://doi.org/10.1016/j.rinp.2024.107688
dc.subjectRefractory high-entropy alloys; Cobalt-free; Phase formation; Alloy design; Radiation resistant
dc.titleBody-centered cubic phase stability in cobalt-free refractory high-entropy alloys
dc.typeJournal article
pubs.publication-statusPublished

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