Uniquely selected primary dendrite arm spacing during competitive growth of columnar grains in Al-Cu alloy

Lee, Jaehoon; Ohno, Munekazu; Shibuta, Yasushi; Takaki, Tomohiro

doi:10.1016/j.jcrysgro.2020.126014


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Uniquely selected primary dendrite arm spacing during competitive growth of columnar grains in Al-Cu alloy

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/88256

Title:	Uniquely selected primary dendrite arm spacing during competitive growth of columnar grains in Al-Cu alloy
Authors:	Lee, Jaehoon Browse this author
	Ohno, Munekazu Browse this author →KAKEN DB
	Shibuta, Yasushi Browse this author
	Takaki, Tomohiro Browse this author
Keywords:	Computer simulation
	Dendrites
	Directional solidification
	Crystal morphology
Issue Date:	15-Mar-2021
Publisher:	Elsevier
Journal Title:	Journal of crystal growth
Volume:	558
Start Page:	126014
Publisher DOI:	10.1016/j.jcrysgro.2020.126014
Abstract:	The steady-state value of primary dendrite arm spacing (PDAS) in the columnar dendrites growing between the converging and diverging grain boundaries is investigated by means of quantitative phase-field simulations. The simulations show that there is a unique value of PDAS under a given solidification condition in the system with grain boundaries. This is in contrast to existence of allowable range of PDAS under a given solidification in a system without the grain boundaries, i.e., an infinitely large columnar grain investigated in many early works. Such a unique value of PDAS depends on the pulling speed and inclination angle of the crystal, but not on the initial condition; that is, it is independent of the history of solidification condition. The dependences of the unique value on the pulling speed and inclination angle qualitatively agree with the theoretical models.
Rights:	©2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Rights:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Type:	article (author version)
URI:	http://hdl.handle.net/2115/88256
Appears in Collections:	工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大野宗一

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