A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy

A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy

The present investigation is directed to phase transitions in the equimolar NiCoFeCrGa high entropy alloy, which is a mixture of face-centered cubic (FCC) and body-centered cubic (BCC) crystalline phases. The microstructure of the samples was investigated by using scanning electron microscopy (SEM),...

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Main Authors: Ádám Vida, János Lábár, Zoltán Dankházi, Zsolt Maksa, Dávid Molnár, Lajos K. Varga, Szilvia Kalácska, Márk Windisch, Gabriella Huhn, Nguyen Q. Chinh
Format: Article
Language:English
Published: MDPI AG 2021-02-01
Series:Materials
Subjects:
NiCoFeCrGa high entropy alloys
phase transformations
multiphase
spinodal decomposition
magnetic behavior
Online Access:https://www.mdpi.com/1996-1944/14/5/1076
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spelling doaj-e8b771e6d7a74f5b9e44b9d214a6ba642021-02-26T00:07:10ZengMDPI AGMaterials1996-19442021-02-01141076107610.3390/ma14051076A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy AlloyÁdám Vida0János Lábár1Zoltán Dankházi2Zsolt Maksa3Dávid Molnár4Lajos K. Varga5Szilvia Kalácska6Márk Windisch7Gabriella Huhn8Nguyen Q. Chinh9Department of Industrial Materials Technology, Bay Zoltán Nonprofit Ltd. for Applied Research, Kondorfa u.1., H-1116 Budapest, HungaryDepartment of Materials Physics, Eötvös Loránd University, P.O.B. 32, H-1518 Budapest, HungaryDepartment of Materials Physics, Eötvös Loránd University, P.O.B. 32, H-1518 Budapest, HungaryDepartment of Materials Physics, Eötvös Loránd University, P.O.B. 32, H-1518 Budapest, HungaryMaterials Science Group, Dalarna University, SE-791-88 Falun, SwedenInstitute of Solid State Physics and Optics, Wigner Research Center for Physics, H-1121 Budapest, Konkoly-Thege u. 29-33, HungaryEmpa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory of Mechanics of Materials and Nanostructures, 3602 Thun Feuerwerkerstrasse 39, SwitzerlandDepartment of Industrial Materials Technology, Bay Zoltán Nonprofit Ltd. for Applied Research, Kondorfa u.1., H-1116 Budapest, HungaryDepartment of Materials Physics, Eötvös Loránd University, P.O.B. 32, H-1518 Budapest, HungaryDepartment of Materials Physics, Eötvös Loránd University, P.O.B. 32, H-1518 Budapest, HungaryThe present investigation is directed to phase transitions in the equimolar NiCoFeCrGa high entropy alloy, which is a mixture of face-centered cubic (FCC) and body-centered cubic (BCC) crystalline phases. The microstructure of the samples was investigated by using scanning electron microscopy (SEM), time-of-flight secondary ion mass spectroscopy (TOF-SIMS), transmission electron microscopy-based energy-dispersive spectroscopy (EDS) and electron energy loss spectroscopy (EELS), as well as X-ray diffraction (XRD) measurements. Based on the phases observed in different temperature ranges, a sequence of the phase transitions can be established, showing that in a realistic process, when freely cooling the sample with the furnace from high to room temperature, a microstructure having spinodal-like decomposition can also be expected. The elemental mapping and magnetic behaviors of this decomposed structure are also studied.https://www.mdpi.com/1996-1944/14/5/1076NiCoFeCrGa high entropy alloysphase transformationsmultiphasespinodal decompositionmagnetic behavior
collection DOAJ
language English
format Article
sources DOAJ
author Ádám Vida
János Lábár
Zoltán Dankházi
Zsolt Maksa
Dávid Molnár
Lajos K. Varga
Szilvia Kalácska
Márk Windisch
Gabriella Huhn
Nguyen Q. Chinh
spellingShingle Ádám Vida
János Lábár
Zoltán Dankházi
Zsolt Maksa
Dávid Molnár
Lajos K. Varga
Szilvia Kalácska
Márk Windisch
Gabriella Huhn
Nguyen Q. Chinh
A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy
Materials
NiCoFeCrGa high entropy alloys
phase transformations
multiphase
spinodal decomposition
magnetic behavior
author_facet Ádám Vida
János Lábár
Zoltán Dankházi
Zsolt Maksa
Dávid Molnár
Lajos K. Varga
Szilvia Kalácska
Márk Windisch
Gabriella Huhn
Nguyen Q. Chinh
author_sort Ádám Vida
title A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy
title_short A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy
title_full A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy
title_fullStr A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy
title_full_unstemmed A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy
title_sort sequence of phase transformations and phases in nicofecrga high entropy alloy
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2021-02-01
description The present investigation is directed to phase transitions in the equimolar NiCoFeCrGa high entropy alloy, which is a mixture of face-centered cubic (FCC) and body-centered cubic (BCC) crystalline phases. The microstructure of the samples was investigated by using scanning electron microscopy (SEM), time-of-flight secondary ion mass spectroscopy (TOF-SIMS), transmission electron microscopy-based energy-dispersive spectroscopy (EDS) and electron energy loss spectroscopy (EELS), as well as X-ray diffraction (XRD) measurements. Based on the phases observed in different temperature ranges, a sequence of the phase transitions can be established, showing that in a realistic process, when freely cooling the sample with the furnace from high to room temperature, a microstructure having spinodal-like decomposition can also be expected. The elemental mapping and magnetic behaviors of this decomposed structure are also studied.
topic NiCoFeCrGa high entropy alloys
phase transformations
multiphase
spinodal decomposition
magnetic behavior
url https://www.mdpi.com/1996-1944/14/5/1076
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