Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I Nucleation
Eutectoid growth, as the important reaction mechanism of the carbon steel heat treatment, is the basis to control the microstructure and performance. At present, most studies have focused on lamellar growth, and did not consider the nucleation process. Mainly due to the nucleation theory is inconclu...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2017-09-01
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| Series: | Archives of Foundry Engineering |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/afe.2017.17.issue-3/afe-2017-0109/afe-2017-0109.xml?format=INT |
| _version_ | 1827847244272893952 |
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| author | Zhang Dongqiao Yin Yajun Zhou Jianxin Tu Zhixin |
| author_facet | Zhang Dongqiao Yin Yajun Zhou Jianxin Tu Zhixin |
| author_sort | Zhang Dongqiao |
| collection | DOAJ |
| description | Eutectoid growth, as the important reaction mechanism of the carbon steel heat treatment, is the basis to control the microstructure and performance. At present, most studies have focused on lamellar growth, and did not consider the nucleation process. Mainly due to the nucleation theory is inconclusive, a lot of research can support their own theory in a certain range. Based on the existing nucleation theory, this paper proposes a cooperative nucleation model to simulate the nucleation process of eutectoid growth. In order to ensure that the nucleation process is more suitable to the theoretical results, different correction methods were used to amend the model respectively. The results of numerical simulation show that when the model is unmodified, the lateral growth of single phase is faster than that of longitudinal growth, so the morphology is oval. Then, the effects of diffusion correction, mobility correction and ledges nucleation mechanism correction on the morphology of nucleation and the nucleation rate were studied respectively. It was found that the introduction of boundary diffusion and the nucleation mechanism of the ledges could lead to a more realistic pearlite. |
| first_indexed | 2024-03-12T09:26:45Z |
| format | Article |
| id | doaj.art-d374a9bee1d54677835a3a5055f8264f |
| institution | Directory Open Access Journal |
| issn | 2299-2944 |
| language | English |
| last_indexed | 2024-03-12T09:26:45Z |
| publishDate | 2017-09-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Foundry Engineering |
| spelling | doaj.art-d374a9bee1d54677835a3a5055f8264f2023-09-02T14:10:56ZengPolish Academy of SciencesArchives of Foundry Engineering2299-29442017-09-0117315516210.1515/afe-2017-0109afe-2017-0109Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I NucleationZhang Dongqiao0Yin Yajun1Zhou Jianxin2Tu Zhixin3State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, ChinaEutectoid growth, as the important reaction mechanism of the carbon steel heat treatment, is the basis to control the microstructure and performance. At present, most studies have focused on lamellar growth, and did not consider the nucleation process. Mainly due to the nucleation theory is inconclusive, a lot of research can support their own theory in a certain range. Based on the existing nucleation theory, this paper proposes a cooperative nucleation model to simulate the nucleation process of eutectoid growth. In order to ensure that the nucleation process is more suitable to the theoretical results, different correction methods were used to amend the model respectively. The results of numerical simulation show that when the model is unmodified, the lateral growth of single phase is faster than that of longitudinal growth, so the morphology is oval. Then, the effects of diffusion correction, mobility correction and ledges nucleation mechanism correction on the morphology of nucleation and the nucleation rate were studied respectively. It was found that the introduction of boundary diffusion and the nucleation mechanism of the ledges could lead to a more realistic pearlite.http://www.degruyter.com/view/j/afe.2017.17.issue-3/afe-2017-0109/afe-2017-0109.xml?format=INTEutectoidNucleation modelNumerical simulationPhase field |
| spellingShingle | Zhang Dongqiao Yin Yajun Zhou Jianxin Tu Zhixin Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I Nucleation Archives of Foundry Engineering Eutectoid Nucleation model Numerical simulation Phase field |
| title | Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I Nucleation |
| title_full | Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I Nucleation |
| title_fullStr | Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I Nucleation |
| title_full_unstemmed | Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I Nucleation |
| title_short | Phase Field Study of Microstructure Evolution in Eutectoid Phase Transformation – I Nucleation |
| title_sort | phase field study of microstructure evolution in eutectoid phase transformation i nucleation |
| topic | Eutectoid Nucleation model Numerical simulation Phase field |
| url | http://www.degruyter.com/view/j/afe.2017.17.issue-3/afe-2017-0109/afe-2017-0109.xml?format=INT |
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