Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition.
In this study, a comprehensive treatment process based on the rotary injection of Ar+CO2 Mg-Al alloy melt is proposed. The effect of carbon on the grain refinement of Mg-Al alloy is studied according to the proposed integrated treatment process. The regularity of carbon refinement in the Mg-Al alloy...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2022-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0271583 |
| _version_ | 1828147809087389696 |
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| author | Lifeng Sun Zhongyu Gao Zhongchao Hu Huyan Chen Jianwen Cai Xiaoou Cai |
| author_facet | Lifeng Sun Zhongyu Gao Zhongchao Hu Huyan Chen Jianwen Cai Xiaoou Cai |
| author_sort | Lifeng Sun |
| collection | DOAJ |
| description | In this study, a comprehensive treatment process based on the rotary injection of Ar+CO2 Mg-Al alloy melt is proposed. The effect of carbon on the grain refinement of Mg-Al alloy is studied according to the proposed integrated treatment process. The regularity of carbon refinement in the Mg-Al alloy is examined by microstructural observation and theoretical calculation. The results show that carbon has no effect on the grain refinement of Mg-Al alloy when the Al content is less than 1wt.%. However, when the Al content reaches 2 wt.%, the refining effect is obvious, and the grain refinement efficiency is 62%. The refining effect increases with the increase in the Al content, and the refinement efficiency becomes 79% when the Al content reaches 9 wt.%. The size of Al-C-O in the matrix is approximately 5μm, which confirms the existence of Al4C3 phase exists as a heterogeneous nucleating agent. The theoretical calculations suggest that the Al4C3 heterogeneous nucleating agent cannot be formed when the Al content in the Mg alloy is less than 1.34%, so there is no thinning effect under such Al content. The crystallographic calculations reveal that the mismatch between the Al4C3 phase and Mg alloy matrix is only 4.05%, and Al4C3 can exist as a heterogeneous nucleating agent for α-Mg phase. Combining the measured solidification curves with the classical nucleation theory, the wetting angle of Mg-Al alloy on Al4C3 is calculated to be 24.3°. |
| first_indexed | 2024-04-11T21:05:46Z |
| format | Article |
| id | doaj.art-579d7760f8954f2dbbaf134cd09f17d8 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-11T21:05:46Z |
| publishDate | 2022-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-579d7760f8954f2dbbaf134cd09f17d82022-12-22T04:03:16ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01178e027158310.1371/journal.pone.0271583Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition.Lifeng SunZhongyu GaoZhongchao HuHuyan ChenJianwen CaiXiaoou CaiIn this study, a comprehensive treatment process based on the rotary injection of Ar+CO2 Mg-Al alloy melt is proposed. The effect of carbon on the grain refinement of Mg-Al alloy is studied according to the proposed integrated treatment process. The regularity of carbon refinement in the Mg-Al alloy is examined by microstructural observation and theoretical calculation. The results show that carbon has no effect on the grain refinement of Mg-Al alloy when the Al content is less than 1wt.%. However, when the Al content reaches 2 wt.%, the refining effect is obvious, and the grain refinement efficiency is 62%. The refining effect increases with the increase in the Al content, and the refinement efficiency becomes 79% when the Al content reaches 9 wt.%. The size of Al-C-O in the matrix is approximately 5μm, which confirms the existence of Al4C3 phase exists as a heterogeneous nucleating agent. The theoretical calculations suggest that the Al4C3 heterogeneous nucleating agent cannot be formed when the Al content in the Mg alloy is less than 1.34%, so there is no thinning effect under such Al content. The crystallographic calculations reveal that the mismatch between the Al4C3 phase and Mg alloy matrix is only 4.05%, and Al4C3 can exist as a heterogeneous nucleating agent for α-Mg phase. Combining the measured solidification curves with the classical nucleation theory, the wetting angle of Mg-Al alloy on Al4C3 is calculated to be 24.3°.https://doi.org/10.1371/journal.pone.0271583 |
| spellingShingle | Lifeng Sun Zhongyu Gao Zhongchao Hu Huyan Chen Jianwen Cai Xiaoou Cai Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition. PLoS ONE |
| title | Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition. |
| title_full | Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition. |
| title_fullStr | Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition. |
| title_full_unstemmed | Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition. |
| title_short | Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition. |
| title_sort | study on the grain refinement mechanism of mg al alloy based on carbon addition |
| url | https://doi.org/10.1371/journal.pone.0271583 |
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