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The chemical ordering and elasticity in FeCoNiAl1-xTix high-entropy alloys
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2019 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 168, p. 5-9Article in journal (Refereed) Published
Abstract [en]

First-principle alloy theory is employed to explore the ordering-induced elastic anomaly in the FeCoNiAl1-xTix (0 ≤ x ≤ 1) high-entropy alloys. The disordered and partially ordered solid solution structures are quantitatively described within unified models. A comparison is made between the elastic parameters of the hypothetical structures, and the presence of L12 phase is found to be responsible for the strong stability in shear deformation in the Ti-rich compositions. The results are in line with experimental observation, and suggest that a proper control of the ordering level can be applied for further optimization of the mechanical characteristics in high-entropy alloys.

Place, publisher, year, edition, pages
2019. Vol. 168, p. 5-9
Keywords [en]
High-entropy alloys, Order-disorder phenomena, Elastic anomalous, First-principle calculations
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:uu:diva-388757DOI: 10.1016/j.scriptamat.2019.04.008ISI: 000470798400002OAI: oai:DiVA.org:uu-388757DiVA, id: diva2:1342791
Funder
Swedish Foundation for Strategic Research Swedish Research CouncilSwedish Energy AgencyThe Swedish Foundation for International Cooperation in Research and Higher Education (STINT)Swedish National Infrastructure for Computing (SNIC)Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-14Bibliographically approved

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Huang, Shuo

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