In situ study of non-equilibrium solidification of CoCrFeNi high-entropy alloy and CrFeNi and CoCrNi ternary suballoys

被引：44

作者：

Andreoli, Angelo F. ^{[1
]}

Shuleshova, Olga ^{[1
]}

Witusiewicz, Victor T. ^{[2
]}

Wu, Yuhao ^{[1
,3
]}

Yang, Yanzhao ^{[1
,4
]}

Ivashko, Oleh ^{[5
]}

Dippel, Ann-Christin ^{[5
]}

Zimmermann, Martin, V ^{[5
]}

Nielsch, Kornelius ^{[6
,7
]}

Kaban, Ivan ^{[1
]}

机构：

[1] IFW Dresden, Inst Complex Mat, Helmholtzstr 20, D-01069 Dresden, Germany

[2] Access eV, Inzestr 5, D-52072 Aachen, Germany

[3] Xian Univ Sci & Technol, Coll Mat Sci & Engn, Xian, Peoples R China

[4] Univ Alberta, Dept Mech Engn, 9211-116 St NW, Edmonton, AB T6G 1H9, Canada

[5] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[6] Inst Metall Mat, IFW Dresden, Helmholtzstr 20, D-01069 Dresden, Germany

[7] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

来源：

ACTA MATERIALIA | 2021年 / 212卷

关键词：

High-entropy alloys; Undercooling; Metastable solidification; Growth kinetics; Microstructure; SPONTANEOUS GRAIN-REFINEMENT; CR-NI ALLOYS; PHASE-SELECTION; MECHANICAL-PROPERTIES; RAPID SOLIDIFICATION; STEEL ALLOYS; NUCLEATION; GROWTH; MELTS; MICROSTRUCTURE;

D O I：

10.1016/j.actamat.2021.116880

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The solidification behavior of the CoCrFeNi high-entropy alloy and the ternary CrFeNi and CoCrNi medium-entropy suballoys has been studied in situ using high-speed video and synchrotron X-ray diffraction on electromagnetically levitated samples. In all alloys, the formation of a primary metastable bcc phase was observed if the melt was sufficiently undercooled. The delay time for the onset of the nucleation of the stable fcc phase, occurring within bcc crystals, is inversely proportional to the melt undercooling. The experimental findings are corroborated by thermodynamic calculations of stable and metastable phase diagrams for the (CoCrNi)-Fe section. Crystal-growth velocities for the CrFeNi, CoCrNi, and CoCrFeNi medium-and high-entropy alloys extracted from the high-speed video sequences in the present study are comparable to the literature data for Fe-rich Fe-Ni and Fe-Cr-Ni alloys, evidencing the same crystallization kinetics. The effect of melt undercooling on the microstructure of solidified samples is analyzed and discussed. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：13

共 68 条

[1] The elastic-strain energy criterion of phase formation for complex concentrated alloys [J].

Andreoli, Angelo F. ;

Orava, Jiri ;

Liaw, Peter K. ;

Weber, Hans ;

de Oliveira, Marcelo F. ;

Nielsch, Kornelius ;

Kaban, Ivan .

MATERIALIA, 2019, 5

[2] MODEL FOR SOLUTE REDISTRIBUTION DURING RAPID SOLIDIFICATION [J].

AZIZ, MJ .

JOURNAL OF APPLIED PHYSICS, 1982, 53 (02) :1158-1168

[3] RAPID CRYSTAL-GROWTH IN UNDERCOOLED FE-NI MELTS [J].

BARTH, M ;

ECKLER, K ;

HERLACH, DM ;

ALEXANDER, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 133 :790-794

[4]

Boettinger W. J., 2006, SPECIAL PUBLICATION, V960-15

[5] The use of high-entropy alloys in additive manufacturing [J].

Brif, Yevgeni ;

Thomas, Meurig ;

Todd, Iain .

SCRIPTA MATERIALIA, 2015, 99 :93-96

[6]

Chalmers B., 1970, APPL SOLID STATE PHY

[7] On the influence of Mn on the phase stability of the CrMnxFeCoNi high entropy alloys [J].

Christofidou, K. A. ;

Pickering, E. J. ;

Orsatti, P. ;

Mignanelli, P. M. ;

Slater, T. J. A. ;

Stone, H. J. ;

Jones, N. G. .

INTERMETALLICS, 2018, 92 :84-92

[8] Structure of some CoCrFeNi and CoCrFeNiPd multicomponent HEA alloys by diffraction techniques [J].

Dahlborg, U. ;

Cornide, J. ;

Calvo-Dahlborg, M. ;

Hansen, T. C. ;

Fitch, A. ;

Leong, Z. ;

Chambreland, S. ;

Goodall, R. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 681 :330-341

[9] The HighScore suite [J].

Degen, Thomas ;

Sadki, Mustapha ;

Bron, Egbert ;

Konig, Uwe ;

Nenert, Gwilherm .

POWDER DIFFRACTION, 2014, 29 :S13-S18

[10] Phase selection, growth, and interface kinetics in undercooled Fe-Ni melt droplets [J].

Eckler, K ;

Gartner, F ;

Assadi, H ;

Norman, AF ;

Greer, AL ;

Herlach, DM .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 226 :410-414

← 1 2 3 4 5 6 7 →