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Simulation of facet dendrite growth with strong interfacial energy anisotropy by phase field method

Content Provider	Springer Nature Link
Author	Yuan, Xun feng Liu, Bao ying Li, Chun Zhou, Chun sheng Ding, Yu tian
Copyright Year	2015
Abstract	Numerical simulations based on a new regularized phase-field model were presented, to simulate the solidification of hexagonal close-packed materials with strong interfacial energy anisotropies. Results show that the crystal grows into facet dendrites, displaying six-fold symmetry. The size of initial crystals has an effect on the branching-off of the principal branch tip along the 〈100〉 direction, which is eliminated by setting the b/a (a and b are the semi-major and semi-minor sizes in the initial elliptical crystals, respectively) value to be less than or equal to 1. With an increase in the undercooling value, the equilibrium morphology of the crystal changes from a star-like shape to facet dendrites without side branches. The steady-state tip velocity increases exponentially when the dimensionless undercooling is below the critical value. With a further increase in the undercooling value, the equilibrium morphology of the crystal grows into a developed side-branch structure, and the steady-state tip velocity of the facet dendrites increases linearly. The facet dendrite growth has controlled diffusion and kinetics.
Starting Page	855
Ending Page	861
Page Count	7
File Format	PDF
ISSN	20952899
Journal	Journal of Central South University of Technology
Volume Number	22
Issue Number	3
e-ISSN	22275223
Language	English
Publisher	Central South University
Publisher Date	2015-03-13
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	phase field facet dendrite hcp materials interfacial energy anisotropy dimensionless undercooling Engineering Metallic Materials
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys Engineering

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