Phase constitution and microstructure of the NbTiVZr refractory high-entropy alloy solidified upon different processing

Angelo F. Andreoli; Rafael G. Mendes; Victor T. Witusiewicz; Olga Shuleshova; Marijn A. van Huis; Kornelius Nielsch; Ivan Kaban

doi:10.1016/j.actamat.2021.117416

Phase constitution and microstructure of the NbTiVZr refractory high-entropy alloy solidified upon different processing

Angelo F. Andreoli^*, Rafael G. Mendes, Victor T. Witusiewicz, Olga Shuleshova, Marijn A. van Huis, Kornelius Nielsch, Ivan Kaban

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Time- and temperature-resolved phase formation in the equiatomic NbTiVZr refractory high-entropy alloy has been studied in situ using high-energy synchrotron X-ray diffraction and high-speed video imaging during non-equilibrium solidification. Phase formation is shown to be dependent on the solidification conditions. When the melt is undercooled over 80 K it crystallizes as a bcc single-phase solid solution despite solute partitioning between dendrites and interdendritic regions. When the sample is for some time kept in the semisolid state, two additional bcc phases form in the interdendritic regions. The crystal growth velocity for the NbTiVZr alloy, as estimated from the high-speed videos, shows pronounced sluggish kinetics.

Original language	English
Article number	117416
Pages (from-to)	1-12
Journal	Acta Materialia
Volume	221
DOIs	https://doi.org/10.1016/j.actamat.2021.117416
Publication status	Published - Dec 2021

Bibliographical note

Funding Information:
AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Vo? for the chemical analysis and J. Werner for the DTA measurements.

Funding Information:
AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Voß for the chemical analysis and J. Werner for the DTA measurements.

Publisher Copyright:
© 2021

Funding

AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Vo? for the chemical analysis and J. Werner for the DTA measurements. AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Voß for the chemical analysis and J. Werner for the DTA measurements.

Keywords

Growth kinetics
High-entropy alloy
Metastable solidification
Microstructure
Undercooling

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1-s2.0-S1359645421007953-mainFinal published version, 4.18 MBLicence: CC BY-NC-ND

Cite this

@article{70606467223548b689f9198c5bde8fae,

title = "Phase constitution and microstructure of the NbTiVZr refractory high-entropy alloy solidified upon different processing",

abstract = "Time- and temperature-resolved phase formation in the equiatomic NbTiVZr refractory high-entropy alloy has been studied in situ using high-energy synchrotron X-ray diffraction and high-speed video imaging during non-equilibrium solidification. Phase formation is shown to be dependent on the solidification conditions. When the melt is undercooled over 80 K it crystallizes as a bcc single-phase solid solution despite solute partitioning between dendrites and interdendritic regions. When the sample is for some time kept in the semisolid state, two additional bcc phases form in the interdendritic regions. The crystal growth velocity for the NbTiVZr alloy, as estimated from the high-speed videos, shows pronounced sluggish kinetics.",

keywords = "Growth kinetics, High-entropy alloy, Metastable solidification, Microstructure, Undercooling",

author = "Andreoli, {Angelo F.} and Mendes, {Rafael G.} and Witusiewicz, {Victor T.} and Olga Shuleshova and {van Huis}, {Marijn A.} and Kornelius Nielsch and Ivan Kaban",

note = "Funding Information: AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Vo? for the chemical analysis and J. Werner for the DTA measurements. Funding Information: AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Vo{\ss} for the chemical analysis and J. Werner for the DTA measurements. Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = dec,

doi = "10.1016/j.actamat.2021.117416",

language = "English",

volume = "221",

pages = "1--12",

journal = "Acta Materialia",

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AU - Andreoli, Angelo F.

AU - Mendes, Rafael G.

AU - Witusiewicz, Victor T.

AU - Shuleshova, Olga

AU - van Huis, Marijn A.

AU - Nielsch, Kornelius

AU - Kaban, Ivan

N1 - Funding Information: AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Vo? for the chemical analysis and J. Werner for the DTA measurements. Funding Information: AFA acknowledges the financial support of the Ph.D. work at the Leibniz IFW Dresden by the Brazilian Federal Agency for Support and Evaluation of Graduate Education CAPES (grant number: 88887.161381/2017-00, 2017) in the frame of CAPES/DAAD/CNPq International Cooperation Program. OS acknowledges the financial support by the German Space Agency DLR under contract 50WM1546. MvH acknowledges funding from the ERC-CoG grant NANO-INSITU (Grant No. 683076). Parts of this research were carried out at the light source PETRA III, beamline P21.1 at DESY, a member of the Helmholtz Association (HGF). We acknowledge O. Ivashko, A-C Dippel, and M. v. Zimmermann for the support of the diffraction measurements at the beamline P21.1. The authors thank A. Voß for the chemical analysis and J. Werner for the DTA measurements. Publisher Copyright: © 2021

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N2 - Time- and temperature-resolved phase formation in the equiatomic NbTiVZr refractory high-entropy alloy has been studied in situ using high-energy synchrotron X-ray diffraction and high-speed video imaging during non-equilibrium solidification. Phase formation is shown to be dependent on the solidification conditions. When the melt is undercooled over 80 K it crystallizes as a bcc single-phase solid solution despite solute partitioning between dendrites and interdendritic regions. When the sample is for some time kept in the semisolid state, two additional bcc phases form in the interdendritic regions. The crystal growth velocity for the NbTiVZr alloy, as estimated from the high-speed videos, shows pronounced sluggish kinetics.

AB - Time- and temperature-resolved phase formation in the equiatomic NbTiVZr refractory high-entropy alloy has been studied in situ using high-energy synchrotron X-ray diffraction and high-speed video imaging during non-equilibrium solidification. Phase formation is shown to be dependent on the solidification conditions. When the melt is undercooled over 80 K it crystallizes as a bcc single-phase solid solution despite solute partitioning between dendrites and interdendritic regions. When the sample is for some time kept in the semisolid state, two additional bcc phases form in the interdendritic regions. The crystal growth velocity for the NbTiVZr alloy, as estimated from the high-speed videos, shows pronounced sluggish kinetics.

KW - Growth kinetics

KW - High-entropy alloy

KW - Metastable solidification

KW - Microstructure

KW - Undercooling

U2 - 10.1016/j.actamat.2021.117416

DO - 10.1016/j.actamat.2021.117416

M3 - Article

AN - SCOPUS:85118340679

SN - 1359-6454

VL - 221

SP - 1

EP - 12

JO - Acta Materialia

JF - Acta Materialia

M1 - 117416

ER -

Phase constitution and microstructure of the NbTiVZr refractory high-entropy alloy solidified upon different processing

Abstract

Bibliographical note

Funding

Keywords

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