Inclusion flotation-driven channel segregation in solidifying steels

Dianzhong Li (), Xing-Qiu Chen, Paixian Fu, Xiaoping Ma, Hongwei Liu, Yun Chen, Yanfei Cao, Yikun Luan and Yiyi Li
Additional contact information
Dianzhong Li: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Xing-Qiu Chen: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Paixian Fu: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Xiaoping Ma: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Hongwei Liu: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Yun Chen: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Yanfei Cao: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Yikun Luan: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
Yiyi Li: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract 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.

Date: 2014
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms6572 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6572

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms6572

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().