How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels
The phenomenon, channel segregates (CS) as a result of gravity-driven flow due to density contrast occurred in the solid-liquid mushy zones1during solidification, often causes the severe destruction of homogeneity and even some fatal damages. Investigation on its mechanism sheds light on the underst...
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ftdatacite:10.48550/arxiv.1308.3344 2023-05-15T18:18:32+02:00 How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels Li, Dianzhong Chen, Xing-Qiu Fu, Paixian Ma, Xiaoping Liu, Hongwei Chen, Yun Luan, Yikun Li, Yiyi 2013 https://dx.doi.org/10.48550/arxiv.1308.3344 https://arxiv.org/abs/1308.3344 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Materials Science cond-mat.mtrl-sci FOS Physical sciences Preprint Article article CreativeWork 2013 ftdatacite https://doi.org/10.48550/arxiv.1308.3344 2022-04-01T13:13:00Z The phenomenon, channel segregates (CS) as a result of gravity-driven flow due to density contrast occurred in the solid-liquid mushy zones1during solidification, often causes the severe destruction of homogeneity and even some fatal damages. Investigation on its mechanism sheds light on the understanding and controlling of the formation of solidifying metals,earth's core, igneous rock and sea ice. Until now, it still remains controversial what composes the density contrasts and, to what extent, how it affects channel segregates. Here, we show that in experimental 500kg and 100 ton commercial cast steel ingots CS originates from oxide Al2O3/MnS impurity clusters (OICs) initially nucleated from the oxide (Al2O3) particles, which induce an extra flow due to sharp density contrast between clusters and melt. The results uncover that, as OICs enrich and grow, their driven flow becomes stronger than the traditionally recognized inter-dendritic thermo-solutal convection, dominating the subsequent opening of the channels. This study extends the classical macrosegregation theory, highlights a significant technological breakthrough to control CS, and could quickly yield practical benefits to the worldwide manufacture of over 50 million tons of ingots, super-thick slab and heavy castings annually, as well as has general implications for the elaboration of other related natural phenomena. : 18 pages, 5 figures Report Sea ice DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Materials Science cond-mat.mtrl-sci FOS Physical sciences |
spellingShingle |
Materials Science cond-mat.mtrl-sci FOS Physical sciences Li, Dianzhong Chen, Xing-Qiu Fu, Paixian Ma, Xiaoping Liu, Hongwei Chen, Yun Luan, Yikun Li, Yiyi How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels |
topic_facet |
Materials Science cond-mat.mtrl-sci FOS Physical sciences |
description |
The phenomenon, channel segregates (CS) as a result of gravity-driven flow due to density contrast occurred in the solid-liquid mushy zones1during solidification, often causes the severe destruction of homogeneity and even some fatal damages. Investigation on its mechanism sheds light on the understanding and controlling of the formation of solidifying metals,earth's core, igneous rock and sea ice. Until now, it still remains controversial what composes the density contrasts and, to what extent, how it affects channel segregates. Here, we show that in experimental 500kg and 100 ton commercial cast steel ingots CS originates from oxide Al2O3/MnS impurity clusters (OICs) initially nucleated from the oxide (Al2O3) particles, which induce an extra flow due to sharp density contrast between clusters and melt. The results uncover that, as OICs enrich and grow, their driven flow becomes stronger than the traditionally recognized inter-dendritic thermo-solutal convection, dominating the subsequent opening of the channels. This study extends the classical macrosegregation theory, highlights a significant technological breakthrough to control CS, and could quickly yield practical benefits to the worldwide manufacture of over 50 million tons of ingots, super-thick slab and heavy castings annually, as well as has general implications for the elaboration of other related natural phenomena. : 18 pages, 5 figures |
format |
Report |
author |
Li, Dianzhong Chen, Xing-Qiu Fu, Paixian Ma, Xiaoping Liu, Hongwei Chen, Yun Luan, Yikun Li, Yiyi |
author_facet |
Li, Dianzhong Chen, Xing-Qiu Fu, Paixian Ma, Xiaoping Liu, Hongwei Chen, Yun Luan, Yikun Li, Yiyi |
author_sort |
Li, Dianzhong |
title |
How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels |
title_short |
How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels |
title_full |
How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels |
title_fullStr |
How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels |
title_full_unstemmed |
How Channel Segregates Originates: The Flow of Accumulated Impurity Clusters in Solidifying Steels |
title_sort |
how channel segregates originates: the flow of accumulated impurity clusters in solidifying steels |
publisher |
arXiv |
publishDate |
2013 |
url |
https://dx.doi.org/10.48550/arxiv.1308.3344 https://arxiv.org/abs/1308.3344 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1308.3344 |
_version_ |
1766195141866946560 |