Inclusion flotation-driven channel segregation in solidifying steels

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	Inclusion flotation-driven channel segregation in solidifying steels
	D. Z. Li; X. Q. Chen; P. X. Fu; X. P. Ma; H. W. Liu; Y. Chen; Y. F. Cao; Y. K. Luan; Y. Y. Li
	2014
发表期刊	Nature Communications
ISSN	2041-1723
卷号	5
摘要	Channel segregation, which is featured by the strip-like shape with compositional variation in cast materials due to density contrast-induced flow during solidification, frequently causes the severe destruction of homogeneity and some fatal damage. An investigation of its mechanism sheds light on the understanding and control of the channel segregation formation in solidifying metals, such as steels. Until now, it still remains controversial what composes the density contrasts and, to what extent, how it affects channel segregation. Here we discover a new force of inclusion flotation that drives the occurrence of channel segregation. It originates from oxide-based inclusions (Al2O3/MnS) and their sufficient volume fraction-driven flotation becomes stronger than the traditionally recognized inter-dendritic thermosolutal buoyancy, inducing the destabilization of the mushy zone and dominating the formation of channels. This study uncovers the mystery of oxygen in steels, extends the classical macro-segregation theory and highlights a significant technological breakthrough to control macrosegregation.
部门归属	[li, dianzhong ; chen, xing-qiu ; fu, paixian ; ma, xiaoping ; liu, hongwei ; chen, yun ; cao, yanfei ; luan, yikun ; li, yiyi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; li, dz (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; dzli@imr.ac.cn
关键词	Columnar Solidification Model Macrosegregation Simulation Alloys Melt Convection Mechanism Behavior Mantle Front
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73264
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. Z. Li,X. Q. Chen,P. X. Fu,et al. Inclusion flotation-driven channel segregation in solidifying steels[J]. Nature Communications,2014,5.
APA	D. Z. Li.,X. Q. Chen.,P. X. Fu.,X. P. Ma.,H. W. Liu.,...&Y. Y. Li.(2014).Inclusion flotation-driven channel segregation in solidifying steels.Nature Communications,5.
MLA	D. Z. Li,et al."Inclusion flotation-driven channel segregation in solidifying steels".Nature Communications 5(2014).