Understanding of macro-segregation in direct-chill cast 2024 alloy with intensive melt shearing based on the evolution of microstructure and temperature field

doi:10.1016/j.jmrt.2023.11.224

IMR OpenIR

	Understanding of macro-segregation in direct-chill cast 2024 alloy with intensive melt shearing based on the evolution of microstructure and temperature field
	Zhang, Ying 1; Liu, Xudong 2,3; Zhu, Qingfeng 2; Zuo, Yubo 2; Wang, Rui 2; Jiang, Haichang 3
通讯作者	Liu, Xudong(liuxudong@imr.ac.cn) ; Zhu, Qingfeng(zhuqingfeng@epm.neu.edu.cn)
	2023-11-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	27 页码:7766-7777
摘要	The influence of intensive melt shearing (IMS) on macro-segregation has been systematically investigated. Experimental results show that the negative centerline segregation is effectively suppressed when the IMS is applied. To reveal the mechanism of IMS on macro-segregation, a quantitative study on the evolution of the slurry region, mushy region, solidification interface, morphology, and concentration of microstructure was carried out. It was confirmed that the IMS parameters determine the dominant mechanism affecting centerline segregation by controlling its action region. When IMS is applied above the liquidus, the fine dendritic structure not only has higher solute content, but also effectively limits the penetration depth of the liquid melt. Moreover, the velocity of the shrinkage flow in the horizontal direction decreases due to the flattening of the solidification interface. At this condition, the above factors play a more dominant role in macro-segregation than the increase of the mushy region thickness. When the action region of IMS changes to the slurry region, the solidification interface profile transforms from a "V" shape to a "VVV" shape. In this case, the influence of the magnitude and direction of the shrinkage flow on macro-segregation is balanced by the near-spherical structure (solute-poor), the increase of permeability, and the thickness of the mushy region. A physical model has been proposed to explain the IMS parameters on macro-segregation.
关键词	Macro -segregation Temperature field Intensive melt shearing Direct -chill casting Aluminum alloy
资助者	National Natural Science Foundation of China
DOI	10.1016/j.jmrt.2023.11.224
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[62103090] ; National Natural Science Foundation of China[51674078] ; National Natural Science Foundation of China[51374067]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001133464900001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183298
专题	中国科学院金属研究所
通讯作者	Liu, Xudong; Zhu, Qingfeng
作者单位	1.Northeastern Univ, Sch Mech Engn & Automat, Shenyang, Liaoning, Peoples R China 2.Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang, Liaoning, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ying,Liu, Xudong,Zhu, Qingfeng,et al. Understanding of macro-segregation in direct-chill cast 2024 alloy with intensive melt shearing based on the evolution of microstructure and temperature field[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,27:7766-7777.
APA	Zhang, Ying,Liu, Xudong,Zhu, Qingfeng,Zuo, Yubo,Wang, Rui,&Jiang, Haichang.(2023).Understanding of macro-segregation in direct-chill cast 2024 alloy with intensive melt shearing based on the evolution of microstructure and temperature field.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,27,7766-7777.
MLA	Zhang, Ying,et al."Understanding of macro-segregation in direct-chill cast 2024 alloy with intensive melt shearing based on the evolution of microstructure and temperature field".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 27(2023):7766-7777.