Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102338
Title: Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection
Authors: Gao, J.
Han, M.
Kao, A.
Pericleous, K.
Alexandrov, D. V.
Galenko, P. K.
Issue Date: 2016
Publisher: Elsevier Ltd
Citation: Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection / J. Gao, M. Han, A. Kao, et al. — DOI 10.1016/j.actamat.2015.10.014 // Acta Materialia. — 2016. — Vol. 103. — P. 184-191.
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 field-dependent 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. © 2015 Acta Materialia Inc.
Keywords: DENDRITIC SOLIDIFICATION
GROWTH KINETICS
STATIC MAGNETIC FIELD
THEORY
UNDERCOOLING
BIOELECTRIC PHENOMENA
HIGH SPEED CAMERAS
KINETICS
MAGNETIC FIELDS
MAGNETISM
MAGNETOHYDRODYNAMICS
NICKEL
UNDERCOOLING
VELOCITY
DENDRITIC SOLIDIFICATION
HIGH MAGNETIC FIELDS
LOW MAGNETIC FIELDS
MICROGRAVITY CONDITIONS
NORMAL GRAVITIES
RETROGRADE BEHAVIOR
STATIC MAGNETIC FIELDS
THEORY
GROWTH KINETICS
URI: http://hdl.handle.net/10995/102338
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84945262855
PURE ID: 604481
00b082f6-075e-4169-af8a-e5ddcb34285a
ISSN: 13596454
DOI: 10.1016/j.actamat.2015.10.014
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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