Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection / Gao Jianrong,Han Mengkun,Kao Andrew,Pericleous Koulis,Alexandrov Dmitri V.,Galenko Peter K. // ACTA MATERIALIA. - 2016. - V. 103, l. . - P. 184-191.

ISSN/EISSN:
1359-6454 / 1873-2453
Type:
Article
Abstract:
Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields up to 6 T were measured using a high-speed camera. The growth velocities for undercoolings below 120 K are depressed under low magnetic fields, but are recovered progressively under high magnetic fields. This retrograde behavior arises from two competing kinds of magnetohydrodynamics in the melt and becomes indistinguishable for higher undercoolings. The measured data is used for testing of a recent theory of dendritic growth with convection. A reasonable agreement is attained by assuming magnetic fielddependent flow velocities. As is shown, the theory can also account for previous data of dendritic growth kinetics in pure succinonitrile under normal gravity and microgravity conditions. These tests demonstrate the efficiency of the theory which provides a realistic description of dendritic growth kinetics of pure substances with convection. 0 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Author keywords:
Dendritic solidification; Growth kinetics; Undercooling; Static magnetic field; Theory PHASE-FIELD; SOLIDIFICATION; ALLOYS; SIMULATIONS; CU; MICROGRAVITY; METALS; FLOW
DOI:
10.1016/j.actamat.2015.10.014
Web of Science ID:
ISI:000367630500018
Соавторы в МНС:
Другие поля
Поле Значение
Month JAN 15
Publisher PERGAMON-ELSEVIER SCIENCE LTD
Address THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language English
EISSN 1873-2453
Keywords-Plus PHASE-FIELD; SOLIDIFICATION; ALLOYS; SIMULATIONS; CU; MICROGRAVITY; METALS; FLOW
Research-Areas Materials Science; Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories Materials Science, Multidisciplinary; Metallurgy \& Metallurgical Engineering
Author-Email jgao@mail.neu.edu.cn
ResearcherID-Numbers Alexandrov, Dmitri/D-2516-2016
ORCID-Numbers Alexandrov, Dmitri/0000-0002-6628-745X Kao, Andrew`/0000-0002-6430-2134 Pericleous, Koulis/0000-0002-7426-9999 Gao, Jianrong/0000-0003-1160-6553
Funding-Acknowledgement National Natural Science Foundation of China {[}51071043, 51211130113]; Fundamental Research Funds for Central Universities {[}N09050901, N130509001]; Overseas Expert Program of the International Office of Northeastern University; International Exchanges Scheme of the Royal Society of the United Kingdom; Ministry of Education and Science of the Russian Federation {[}315]; Government of the Russian Federation {[}02.A03.21.0006]; German Research Foundation (DFG) {[}RE 1261/8-2]; Russian Foundation for Basic Research (RFBR) {[}14-29-10282]
Funding-Text The authors thank Profs. D. M. Herlach, D. Holland-Moritz and G. Wilde for helpful discussion of crystal nucleation and dendritic growth in undercooled melts. The authors thank J. Y. Cai, J. Liu and X. W. Zhao for assistance in experimental work. The authors also thank Drs. J. Gegner, C. Karrasch and S. Cai for providing computer programs for image and data analyses. J. Gao acknowledges support by the National Natural Science Foundation of China (51071043 and 51211130113), Fundamental Research Funds for Central Universities (N09050901 and N130509001), and the Overseas Expert Program of the International Office of Northeastern University. A. Kao and P. Kericleous acknowledge support by the International Exchanges Scheme of the Royal Society of the United Kingdom. D. V. Alexandrov acknowledges support from the Ministry of Education and Science of the Russian Federation (Project No. 315) and from the Government of the Russian Federation under the contract No. 02.A03.21.0006 (act 211). P. K. Galenko acknowledges support by German Research Foundation (DFG Project RE 1261/8-2) and Russian Foundation for Basic Research (RFBR Project No. 14-29-10282).
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Journal-ISO Acta Mater.
Doc-Delivery-Number DA2MU