A novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment
In this study, a vertical twin-roll cast (TRC) thermal-fluid coupling model was established to determine a suitable roll-casting velocity. A slab of 0.9 mm thick roll-cast Al-50 wt.% Si alloy with a two-phase zone width of 473 °C was prepared at a velocity of 20 m/min for the first time. In addition...
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oai:doaj.org-article:63643b9219b34386aefb2428cc195f262021-12-04T04:34:27ZA novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment2238-785410.1016/j.jmrt.2021.11.074https://doaj.org/article/63643b9219b34386aefb2428cc195f262021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421013533https://doaj.org/toc/2238-7854In this study, a vertical twin-roll cast (TRC) thermal-fluid coupling model was established to determine a suitable roll-casting velocity. A slab of 0.9 mm thick roll-cast Al-50 wt.% Si alloy with a two-phase zone width of 473 °C was prepared at a velocity of 20 m/min for the first time. In addition, the finite element simulation showed that the average heat transfer rate had a positive correlation with the roll-casting velocity. When the roll-casting velocity increased to 20 m/min, the average heat transfer rate reached 1260 K/s, at which point, the average size of the primary Si was merely 16.5 μm. This was a decrease of approximately 90% when compared with the size of alloys cast with conventional methods. After carrying out semi-solid heating, an observation on the distribution of alloy elements identified a novel phenomenon of solute redistribution, i.e., inverse segregation. This inverse segregation process was highly significant in further controlling solute redistribution in the alloy. Additionally, it provided a new concept for improving roll-cast segregation.Chen ZhouTao JiangWei YuBoyue XuJunyan ChenYonghui SunYong LiGuangming XuElsevierarticleTwin-roll castingFinite element simulationSemi-solid heat treatmentSolute redistributionMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 6295-6311 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
Twin-roll casting Finite element simulation Semi-solid heat treatment Solute redistribution Mining engineering. Metallurgy TN1-997 |
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Twin-roll casting Finite element simulation Semi-solid heat treatment Solute redistribution Mining engineering. Metallurgy TN1-997 Chen Zhou Tao Jiang Wei Yu Boyue Xu Junyan Chen Yonghui Sun Yong Li Guangming Xu A novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment |
| description |
In this study, a vertical twin-roll cast (TRC) thermal-fluid coupling model was established to determine a suitable roll-casting velocity. A slab of 0.9 mm thick roll-cast Al-50 wt.% Si alloy with a two-phase zone width of 473 °C was prepared at a velocity of 20 m/min for the first time. In addition, the finite element simulation showed that the average heat transfer rate had a positive correlation with the roll-casting velocity. When the roll-casting velocity increased to 20 m/min, the average heat transfer rate reached 1260 K/s, at which point, the average size of the primary Si was merely 16.5 μm. This was a decrease of approximately 90% when compared with the size of alloys cast with conventional methods. After carrying out semi-solid heating, an observation on the distribution of alloy elements identified a novel phenomenon of solute redistribution, i.e., inverse segregation. This inverse segregation process was highly significant in further controlling solute redistribution in the alloy. Additionally, it provided a new concept for improving roll-cast segregation. |
| format |
article |
| author |
Chen Zhou Tao Jiang Wei Yu Boyue Xu Junyan Chen Yonghui Sun Yong Li Guangming Xu |
| author_facet |
Chen Zhou Tao Jiang Wei Yu Boyue Xu Junyan Chen Yonghui Sun Yong Li Guangming Xu |
| author_sort |
Chen Zhou |
| title |
A novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment |
| title_short |
A novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment |
| title_full |
A novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment |
| title_fullStr |
A novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment |
| title_full_unstemmed |
A novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast Al-50 wt.% alloy treated by semi-solid heat treatment |
| title_sort |
novel research on the solute redistribution phenomenon of sub-rapid twin-roll cast al-50 wt.% alloy treated by semi-solid heat treatment |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://doaj.org/article/63643b9219b34386aefb2428cc195f26 |
| work_keys_str_mv |
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