Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model

The grain growth behavior in a typical Ni-based superalloy was investigated using isothermal heat treatment experiments over a holding temperature range of 1353–1473 K. The experimental results showed that the grain structure continuously coarsened as the holding time and holding temperature increas...

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Autores principales:	Yan-Xing Liu, Zhi-Jiang Ke, Run-Hua Li, Ju-Qing Song, Jing-Jing Ruan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	grain growth cellular automaton Ni-based superalloy Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/f75182f93e294c07996866910ea5e66e
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spelling	oai:doaj.org-article:f75182f93e294c07996866910ea5e66e2021-11-25T18:14:44ZStudy of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model10.3390/ma142269221996-1944https://doaj.org/article/f75182f93e294c07996866910ea5e66e2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6922https://doaj.org/toc/1996-1944The grain growth behavior in a typical Ni-based superalloy was investigated using isothermal heat treatment experiments over a holding temperature range of 1353–1473 K. The experimental results showed that the grain structure continuously coarsened as the holding time and holding temperature increased during heat treatment. A classical parabolic grain growth model was used to explore the mechanism of grain growth under experimental conditions. The grain growth exponent was found to be slightly above 2. This indicates that the current grain growth in the studied superalloy is mainly governed by grain boundary migration with a minor pinning effect from the precipitates. Then, the grain growth in the studied superalloy during isothermal heat treatment was modelled by a cellular automaton (CA) with deterministic state switch rules. The microscale kinetics of grain growth is described by the correlation between the moving velocity and curvature of the grain boundary. The local grain boundary curvature is well evaluated by a template disk method. The grain boundary mobility was found to increase with increasing temperature. The relationship between the grain boundary mobility and temperature has been established. The developed CA model is capable of capturing the dependence of the grain size on the holding time under different holding temperatures.Yan-Xing LiuZhi-Jiang KeRun-Hua LiJu-Qing SongJing-Jing RuanMDPI AGarticlegrain growthcellular automatonNi-based superalloyTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6922, p 6922 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	grain growth cellular automaton Ni-based superalloy Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	grain growth cellular automaton Ni-based superalloy Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Yan-Xing Liu Zhi-Jiang Ke Run-Hua Li Ju-Qing Song Jing-Jing Ruan Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model
description	The grain growth behavior in a typical Ni-based superalloy was investigated using isothermal heat treatment experiments over a holding temperature range of 1353–1473 K. The experimental results showed that the grain structure continuously coarsened as the holding time and holding temperature increased during heat treatment. A classical parabolic grain growth model was used to explore the mechanism of grain growth under experimental conditions. The grain growth exponent was found to be slightly above 2. This indicates that the current grain growth in the studied superalloy is mainly governed by grain boundary migration with a minor pinning effect from the precipitates. Then, the grain growth in the studied superalloy during isothermal heat treatment was modelled by a cellular automaton (CA) with deterministic state switch rules. The microscale kinetics of grain growth is described by the correlation between the moving velocity and curvature of the grain boundary. The local grain boundary curvature is well evaluated by a template disk method. The grain boundary mobility was found to increase with increasing temperature. The relationship between the grain boundary mobility and temperature has been established. The developed CA model is capable of capturing the dependence of the grain size on the holding time under different holding temperatures.
format	article
author	Yan-Xing Liu Zhi-Jiang Ke Run-Hua Li Ju-Qing Song Jing-Jing Ruan
author_facet	Yan-Xing Liu Zhi-Jiang Ke Run-Hua Li Ju-Qing Song Jing-Jing Ruan
author_sort	Yan-Xing Liu
title	Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model
title_short	Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model
title_full	Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model
title_fullStr	Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model
title_full_unstemmed	Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model
title_sort	study of grain growth in a ni-based superalloy by experiments and cellular automaton model
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f75182f93e294c07996866910ea5e66e
work_keys_str_mv	AT yanxingliu studyofgraingrowthinanibasedsuperalloybyexperimentsandcellularautomatonmodel AT zhijiangke studyofgraingrowthinanibasedsuperalloybyexperimentsandcellularautomatonmodel AT runhuali studyofgraingrowthinanibasedsuperalloybyexperimentsandcellularautomatonmodel AT juqingsong studyofgraingrowthinanibasedsuperalloybyexperimentsandcellularautomatonmodel AT jingjingruan studyofgraingrowthinanibasedsuperalloybyexperimentsandcellularautomatonmodel
_version_	1718411477285601280

Study of Grain Growth in a Ni-Based Superalloy by Experiments and Cellular Automaton Model

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