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Coalescence-dominated microstructure evolution during solidification of 20SiMn steel
Ma, Xiao-ping; Li, Dian-zhong
Corresponding AuthorMa, Xiao-ping(xpma@imr.ac.cn)
2020-05-01
Source PublicationJOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN1006-706X
Volume27Issue:5Pages:506-516
AbstractThe evolution of microstructures during the solidification of 20SiMn steel was investigated. The dominant role of coalescence was revealed by analyzing the quenched microstructures and the solute distribution. In the parameter range investigated, including the slow solidification, the fast solidification and the directional solidification, the coalescence can happen at multiple solidification stages and on multi-scales. During the directional solidification, the ternary and fourth dendritic arms coalesce into the secondary dendritic arms, and the secondary dendritic arms further coalesce to produce the cellular crystals. The cellular crystals become coarse through further coalescence. During the non-directional solidification, the initial microstructures are discrete crystals without the dendritic pattern. Both the dendritic arms and dendritic stems appearing in the later solidification stage are produced by the coalescence on multi-scales. The coalescence is more significant in the later solidification stage. The mechanism of coalescence is attributed to different melt compositions in different local domains and the reduction of the interface energy.
KeywordSolidification Microstructure Coalescence Steel Microsegregation
DOI10.1007/s42243-019-00311-0
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000531155800003
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138779
Collection中国科学院金属研究所
Corresponding AuthorMa, Xiao-ping
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Ma, Xiao-ping,Li, Dian-zhong. Coalescence-dominated microstructure evolution during solidification of 20SiMn steel[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2020,27(5):506-516.
APA Ma, Xiao-ping,&Li, Dian-zhong.(2020).Coalescence-dominated microstructure evolution during solidification of 20SiMn steel.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,27(5),506-516.
MLA Ma, Xiao-ping,et al."Coalescence-dominated microstructure evolution during solidification of 20SiMn steel".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 27.5(2020):506-516.
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