IMR OpenIR
Heterogeneous strip originated from the separate enriched melt: Innate character and physical mechanism
Ma, Xiaoping; Li, Dianzhong; Ma, XP (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Materials Sci, Shenyang 110016, Peoples R China.
2016-07-01
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN0017-9310
Volume98Pages:558-567
AbstractThe chemical heterogeneity, well-known as macrosegregation, is a major problem in the casting of steel ingots. Most heterogeneity generally originated from the solute partition and solute distribution in the solidification process with interdendritic convection. In this article, a new heterogeneous phenomenon originated from the movement of separate enriched melt is discovered in a steel ingot. A strip characterized as ferrite chains and MnS chains is revealed by macro-etching. The formation mechanism for the heterogeneous strip is proposed. In the mushy zone of the ingot, a large amount of separate S-enriched melts move laterally and upwards. Some S-enriched melts will remain in the moving trace. Such residual S-enriched melts produce a large amount of MnS inclusion chains. In the subsequent solid phase transition process, promoted by the MnS chains, ferrite prefers to be transited from the austenite near the MnS inclusions and shows as a large amount of separate ferrite chains. A large amount of ferrite chains align in a strip-like zone, which results in the heterogeneous strip phenomenon in macro-etching process. The physical model about the driving force for the movement of separate S-enriched melts is further theoretically analyzed. In the mushy zone, the interface tension resultant applied on the separate S-enriched melts can act as the drive force for the lateral movement of separate S-enriched melts. And the buoyance applied on the separate S-enriched melts acts as the drive force for the upwards movement. The interaction between the impurity movement and the solute segregation is also discussed. (C) 2016 Elsevier Ltd. All rights reserved.
description.department[ma, xiaoping ; li, dianzhong] chinese acad sci, inst met res, shenyang natl lab materials sci, shenyang 110016, peoples r china
KeywordHeterogeneous Strip Mushy Zone Separate Melt Movement Interface Tension Phase Transition
Subject AreaThermodynamics ; Engineering ; Mechanics
Funding OrganizationYouth Innovation Promotion Association of Chinese Academy of Sciences
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75821
Collection中国科学院金属研究所
Corresponding AuthorMa, XP (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Materials Sci, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Ma, Xiaoping,Li, Dianzhong,Ma, XP . Heterogeneous strip originated from the separate enriched melt: Innate character and physical mechanism[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2016,98:558-567.
APA Ma, Xiaoping,Li, Dianzhong,&Ma, XP .(2016).Heterogeneous strip originated from the separate enriched melt: Innate character and physical mechanism.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,98,558-567.
MLA Ma, Xiaoping,et al."Heterogeneous strip originated from the separate enriched melt: Innate character and physical mechanism".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 98(2016):558-567.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ma, Xiaoping]'s Articles
[Li, Dianzhong]'s Articles
[Ma, XP (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Materials Sci, Shenyang 110016, Peoples R China.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ma, Xiaoping]'s Articles
[Li, Dianzhong]'s Articles
[Ma, XP (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Materials Sci, Shenyang 110016, Peoples R China.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ma, Xiaoping]'s Articles
[Li, Dianzhong]'s Articles
[Ma, XP (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Materials Sci, Shenyang 110016, Peoples R China.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.