On the nucleus composition during isothermal alloy solidification

Abstract Accurate determination of the nucleus composition during isothermal alloy solidification still represents a great challenge nowadays. In this paper, a kinetic scheme was added to the Hillert-Rettenmayr thermodynamic analysis of the deviation from local equilibrium at migrating phase interfa...

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Main Authors:	Xun Kang, Lijun Zhang, Sergey Sobolev
Format:	article
Language:	EN
Published:	Nature Portfolio 2018
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/94dacb81d5e040c9a8077e924f41f5a3
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spelling	oai:doaj.org-article:94dacb81d5e040c9a8077e924f41f5a32021-12-02T15:08:28ZOn the nucleus composition during isothermal alloy solidification10.1038/s41598-018-23123-w2045-2322https://doaj.org/article/94dacb81d5e040c9a8077e924f41f5a32018-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-23123-whttps://doaj.org/toc/2045-2322Abstract Accurate determination of the nucleus composition during isothermal alloy solidification still represents a great challenge nowadays. In this paper, a kinetic scheme was added to the Hillert-Rettenmayr thermodynamic analysis of the deviation from local equilibrium at migrating phase interfaces. A so-called interface permeability was introduced to account for the unambiguous determination of the energy dissipation of the solute rearrangement at the liquid-solid interface and the driving force for interface movement, from which the nucleus composition can be then evaluated. After benchmark test, a pragmatic nucleation model for solidification was also proposed, and applied in three-dimensional phase-field simulations of nucleation and subsequent dendritic growth during isothermal solidification process in one hypothetic Al-Si alloy. Moreover, the influence of the interface permeability on nucleation rate was fully discussed by exploring its effect on the initial nucleus components and the corresponding nucleation driving force.Xun KangLijun ZhangSergey SobolevNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xun Kang Lijun Zhang Sergey Sobolev On the nucleus composition during isothermal alloy solidification
description	Abstract Accurate determination of the nucleus composition during isothermal alloy solidification still represents a great challenge nowadays. In this paper, a kinetic scheme was added to the Hillert-Rettenmayr thermodynamic analysis of the deviation from local equilibrium at migrating phase interfaces. A so-called interface permeability was introduced to account for the unambiguous determination of the energy dissipation of the solute rearrangement at the liquid-solid interface and the driving force for interface movement, from which the nucleus composition can be then evaluated. After benchmark test, a pragmatic nucleation model for solidification was also proposed, and applied in three-dimensional phase-field simulations of nucleation and subsequent dendritic growth during isothermal solidification process in one hypothetic Al-Si alloy. Moreover, the influence of the interface permeability on nucleation rate was fully discussed by exploring its effect on the initial nucleus components and the corresponding nucleation driving force.
format	article
author	Xun Kang Lijun Zhang Sergey Sobolev
author_facet	Xun Kang Lijun Zhang Sergey Sobolev
author_sort	Xun Kang
title	On the nucleus composition during isothermal alloy solidification
title_short	On the nucleus composition during isothermal alloy solidification
title_full	On the nucleus composition during isothermal alloy solidification
title_fullStr	On the nucleus composition during isothermal alloy solidification
title_full_unstemmed	On the nucleus composition during isothermal alloy solidification
title_sort	on the nucleus composition during isothermal alloy solidification
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/94dacb81d5e040c9a8077e924f41f5a3
work_keys_str_mv	AT xunkang onthenucleuscompositionduringisothermalalloysolidification AT lijunzhang onthenucleuscompositionduringisothermalalloysolidification AT sergeysobolev onthenucleuscompositionduringisothermalalloysolidification
_version_	1718388136103378944

On the nucleus composition during isothermal alloy solidification

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