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Comparison of Channel Segregation Formation in Model Alloys and Steels via Numerical Simulations
Cao, Y. F.; Chen, Y.; Li, D. Z.; Liu, H. W.; Fu, P. X.; Chen, Y (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
2016-06-01
发表期刊METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
卷号47A期号:6页码:2927-2939
摘要In the current study, the evolutions of channel segregations in several alloy systems, such as the typically used model alloys (e.g., Ga-In, Sn-Pb, Sn-Bi, Al-Cu, and Ni-based superalloy) and some special steels, are numerically simulated in a cavity solidified unidirectionally. The simulations are based on a modified continuum macrosegregation model with an extension to the multicomponent systems. The results of model alloys and steels indicate that when the thermosolutal convection is strong enough, flow instability occurs, which in turn destabilizes the mushy zone. Subsequently, the channel segregation forms with the continuous interaction between solidification and flow. The formation behavior and severity of channel segregations in various systems are different owing to their distinct melt convection strengths and solidification natures. In the current simulations, channels are apparent for model alloys with high content of solutes, whereas they are slight in some special steels, such as 27SiMn steel, and totally disappear in carbon steels. These occurrence features of channel segregation in simulations of steels are consistent with the analyses by a modified Rayleigh number associated with alloying elements, and both outcomes are well supported by the fully sectioned steel ingots in experiments. (C) The Minerals, Metals & Materials Society and ASM International 2016
部门归属[cao, y. f. ; chen, y. ; li, d. z. ; liu, h. w. ; fu, p. x.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china
学科领域Materials Science ; Metallurgy & Metallurgical Engineering
资助者Strategic Priority Research Program of Chinese Academy of Sciences [XDA03010304]; National Natural Science Foundation of China [51271184, U1508215]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75859
专题中国科学院金属研究所
通讯作者Chen, Y (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Cao, Y. F.,Chen, Y.,Li, D. Z.,et al. Comparison of Channel Segregation Formation in Model Alloys and Steels via Numerical Simulations[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2016,47A(6):2927-2939.
APA Cao, Y. F.,Chen, Y.,Li, D. Z.,Liu, H. W.,Fu, P. X.,&Chen, Y .(2016).Comparison of Channel Segregation Formation in Model Alloys and Steels via Numerical Simulations.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,47A(6),2927-2939.
MLA Cao, Y. F.,et al."Comparison of Channel Segregation Formation in Model Alloys and Steels via Numerical Simulations".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 47A.6(2016):2927-2939.
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