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Existence or nonexistence of thermal pinning effect in grain growth under temperature gradient

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Title: Existence or nonexistence of thermal pinning effect in grain growth under temperature gradient
Authors: Ohno, Munekazu Browse this author →KAKEN DB
Yamaguchi, Taichi Browse this author
Sato, Daisuke Browse this author
Matsuura, Kiyotaka Browse this author →KAKEN DB
Keywords: Grain growth
Thermal pinning
Phase-field model
Steel
Welding
Casting
Issue Date: Mar-2013
Publisher: Elsevier B.V.
Journal Title: Computational Materials Science
Volume: 69
Start Page: 7
End Page: 13
Publisher DOI: 10.1016/j.commatsci.2012.11.017
Abstract: In order to clarify existence or non-existence of the thermal pinning, viz., retardation of grain growth in polycrystalline materials due to steep temperature gradient, effects of the temperature gradient on the grain growth were systematically investigated by means of the phase-field simulations. It was found that the local grain growth is determined only by the local thermal history regardless of the temperature gradient and hence the temperature gradient does not directly influence the local grain growth. It was concluded that the thermal pinning does not exist when the grain boundary energy and mobility are isotropic and the grain growth is driven only by the reduction of total grain boundary energy.
Type: article (author version)
URI: http://hdl.handle.net/2115/52230
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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