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Investigation of the metastable spinodally decomposed magnetic CrFe-rich phase in Al doped CrFeCoNi alloy
Department of Materials Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden.
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, China; Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Uppsala, Sweden.
National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, China; Chongqing Institute for Advanced Light Metals, Chongqing, China.
Department of Materials Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden.
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2023 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 939, article id 168794Article in journal (Refereed) Published
Abstract [en]

We have conducted an in-depth study of the magnetic phase due to a spinodal decomposition of the BCC phase of a CrFe-rich composition. This magnetic phase is present after casting (arc melting) or water quenching after annealing at 1250 degrees C for 24 h but is entirely absent after annealing in the interval 900-1100 degrees C for 24 h. Its formation is favored in the temperature interval ca 450-550 degrees C and loses magnetization above 640 degrees C. This ferromagnetic-paramagnetic transition is due to a structural transformation from ferromagnetic BCC into paramagnetic sigma and FCC phases. The conclusion from measurements at different heating rates is that both the transformation leading to the increase of the magnetization due to the spinodal decomposition of the parent phase and the vanishing magnetization at 640 degrees C are diffusion controlled. (c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 939, article id 168794
Keywords [en]
High entropy alloy, AlCrFeCoNi, Spinodal decomposition, Structural transformation, Magnetization
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:oru:diva-106334DOI: 10.1016/j.jallcom.2023.168794ISI: 000996492500001Scopus ID: 2-s2.0-85146081676OAI: oai:DiVA.org:oru-106334DiVA, id: diva2:1770928
Funder
Swedish Foundation for Strategic ResearchSwedish Research Council, 2017-06474 2019-04971Vinnova, 2019-05111Carl Tryggers foundation , 19:325 20:474
Note

Funding agency:

Orszagos Tudomanyos Kutatasi Alapprogramok (OTKA) 128229

Available from: 2023-06-20 Created: 2023-06-20 Last updated: 2023-06-20Bibliographically approved

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Eriksson, Olle

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