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Inducing mechanism and model of the critical oxygen content in homogenized steel
Cao, Yanfei1; Li, Dianzhong1; Chen, Xing-Qiu1; Liu, Chen1,2; Chen, Yun1; Fu, Paixian1; Liu, Hongwei1; Ma, Xiaoping1; Liu, Yang1; Luan, Yikun1; Hu, Xiaoqiang1
Corresponding AuthorLi, Dianzhong(dzli@imr.ac.cn)
2021-07-01
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume205Pages:11
AbstractMacrosegregation is the key issue in the solidification field. Oxygen and its inclusions play the important role in driving the melt flow and the resulting macrosegregation in steel. Here, to reveal the inducing mechanism and quantitative model of oxygen content in real industrial steel ingots, we demonstrate for the first time that there exists the critical oxygen content in triggering the formation of channel type segregation, the most undesirable macrosegregation type in steel. Our multiscale simulations from density functional theory calculations to multiphase/multicomponent macromodel, clarify the quantitative conditions initializing channel-type segregation and reveal two typical growth modes via oxide flotation. The oxygen content model and criterion to induce the channel onset is built accordingly, which are validated by the numerous full ingot dissections and experimental characterizations including the in situ electrolysis of inclusions, X-ray microtomography, scanning electron microscope, large-scale measurement system of inclusions and chemical analysis. With oxygen controlled below this critical value of 0.0008 wt%, channel disappears. This study quantitatively uncovers the novel role of oxygen in steel, changes the traditional sole concept of cleanliness, and highlights an innovative and controlling effective route to fabricate homogenized steel. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
KeywordChannel-type segregation Homogenized steel Oxygen Multiscale simulations Critical value
Funding OrganizationNational Natural Science Foundation of China ; National Science and Technology Major Project ; Young Talent Project by SYNL ; Innovation project of the cutting-edge basic research and key technology by SYNL ; Project to Strengthen Industrial Development at the Grass-roots Level
DOI10.1016/j.matdes.2021.109723
Indexed BySCI
Languageen
Funding ProjectNational Natural Science Foundation of China[51701225] ; National Natural Science Foundation of China[U1708252] ; National Science and Technology Major Project[2017-VII-0008-0101] ; Young Talent Project by SYNL[L2019F33] ; Innovation project of the cutting-edge basic research and key technology by SYNL[L2019R36] ; Project to Strengthen Industrial Development at the Grass-roots Level[TC190A4DA/35]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000663558100002
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160586
Collection中国科学院金属研究所
Corresponding AuthorLi, Dianzhong
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Wenhua Rd 72, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Cao, Yanfei,Li, Dianzhong,Chen, Xing-Qiu,et al. Inducing mechanism and model of the critical oxygen content in homogenized steel[J]. MATERIALS & DESIGN,2021,205:11.
APA Cao, Yanfei.,Li, Dianzhong.,Chen, Xing-Qiu.,Liu, Chen.,Chen, Yun.,...&Hu, Xiaoqiang.(2021).Inducing mechanism and model of the critical oxygen content in homogenized steel.MATERIALS & DESIGN,205,11.
MLA Cao, Yanfei,et al."Inducing mechanism and model of the critical oxygen content in homogenized steel".MATERIALS & DESIGN 205(2021):11.
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