Inducing mechanism and model of the critical oxygen content in homogenized steel

doi:10.1016/j.matdes.2021.109723

IMR OpenIR

	Inducing mechanism and model of the critical oxygen content in homogenized steel
	Cao, Yanfei 1; Li, Dianzhong 1; Chen, Xing-Qiu 1; Liu, Chen 1,2; Chen, Yun 1; Fu, Paixian 1; Liu, Hongwei 1; Ma, Xiaoping 1; Liu, Yang 1; Luan, Yikun 1; Hu, Xiaoqiang 1
通讯作者	Li, Dianzhong(dzli@imr.ac.cn)
	2021-07-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	205 页码:11
摘要	Macrosegregation 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/).
关键词	Channel-type segregation Homogenized steel Oxygen Multiscale simulations Critical value
资助者	National 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
DOI	10.1016/j.matdes.2021.109723
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000663558100002
出版者	ELSEVIER SCI LTD
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/160586
专题	中国科学院金属研究所
通讯作者	Li, Dianzhong
作者单位	1.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
推荐引用方式 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.