Surface-active element transport and its effect on liquid metal flow in laser-assisted additive manufacturing

doi:10.1016/j.icheatmasstransfer.2017.06.007

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	Surface-active element transport and its effect on liquid metal flow in laser-assisted additive manufacturing
	Gan ZT(甘正涛); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Yu, G; He, XL (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100049, Peoples R China.
刊名	INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
	2017-08-01
卷号	86 页码:206-214
关键词	Additive Manufacturing Mass Transfer Surface-active Element Fluid Flow
ISSN号	0735-1933
DOI	10.1016/j.icheatmasstransfer.2017.06.007
文献子类	Article
英文摘要	During laser-assisted additive manufacturing, the transport phenomena, solidification behavior, and melt pool geometry are affected by base-metal sulfur content and oxygen present in the atmosphere. The role of these surface-active elements during metal-based additive manufacturing is not well understood. In this study, the mass transport of sulfur and its effect on liquid metal convection (Marangoni flow) are examined by using an improved 3D transient heat transfer and fluid flow numerical model. An improved surface tension model is proposed to take into account the influence of sulfur content and temperature at the surface of melt pool. The sulfur mass transport equation is combined with the other conservation equations. The results show that the sulfur redistribution leads to transitional Marangoni flow. The powder addition into the melt pool results in the dilution of sulfur in the melt pool. Increase in mass flow rate and energy input results in decreased temperature coefficient of surface tension. When temperature coefficient of surface tension changes sign from positive to negative, the flow motion transition from inward flow to outward flow occurs. Two predominant types of flow pattern lead to two types of fusion boundaries of deposited track.
分类号	一类
URL标识	查看原文
WOS关键词	HEAT-TRANSFER ; FLUID-FLOW ; WELD POOL ; NUMERICAL-SIMULATION ; DEPOSITION ; TEMPERATURE ; OXYGEN ; MODEL ; CONVECTION ; TENSION
WOS研究方向	Thermodynamics ; Mechanics
语种	英语
WOS记录号	WOS:000408183800024
资助机构	National Natural Science Foundation of China(11272316 ; 11272317 ; 11502269)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/70058]
专题	力学研究所_先进制造工艺力学重点实验室
通讯作者	Yu, G; He, XL (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Gan ZT,Yu G,He XL,et al. Surface-active element transport and its effect on liquid metal flow in laser-assisted additive manufacturing[J]. INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER,2017,86:206-214.
APA	甘正涛,虞钢,何秀丽,李少霞,Yu, G,&He, XL .(2017).Surface-active element transport and its effect on liquid metal flow in laser-assisted additive manufacturing.INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER,86,206-214.
MLA	甘正涛,et al."Surface-active element transport and its effect on liquid metal flow in laser-assisted additive manufacturing".INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 86(2017):206-214.