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Preparing bulk ultrafine-microstructure high-entropy alloys via direct solidification
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2018 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 10, no 4, p. 1912-1919Article in journal (Refereed) Published
Abstract [en]

In the past three decades, nanostructured (NS) and ultrafine-microstructure (UFM) materials have received extensive attention due to their excellent mechanical properties such as high strength. However, preparing low-cost and bulk NS and UFM materials remains to be a challenge, which limits their industrial applications. Here, we report a new strategy to prepare bulk UFM alloys via the direct solidification of high-entropy alloys (HEAs). As a proof of concept, we designed AlCoCrxFeNi (1.8 <= x <= 2.0) HEAs and achieved a complete UFM in bulk materials. The compositional requirements for obtaining the formation of the UFM are highly demanding, necessitating the coupling of near eutectic alloy composition and the high temperature decomposition of supersaturated primary and secondary phases. Our strategy provides a low-cost and highly efficient method to prepare bulk UFM alloys, with great potential to accelerate the engineering application of these materials.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2018. Vol. 10, no 4, p. 1912-1919
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Other Materials Engineering
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URN: urn:nbn:se:kth:diva-222414DOI: 10.1039/c7nr07281cISI: 000423355300041PubMedID: 29318249Scopus ID: 2-s2.0-85041175969OAI: oai:DiVA.org:kth-222414DiVA, id: diva2:1186318
Note

QC 20180228

Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-05-24Bibliographically approved

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Mao, Huahai

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