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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.
Source PublicationINTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
2017-08-01
Volume86Pages:206-214
ISSN0735-1933
AbstractDuring 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.
KeywordAdditive Manufacturing Mass Transfer Surface-active Element Fluid Flow
DOI10.1016/j.icheatmasstransfer.2017.06.007
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000408183800024
WOS KeywordHEAT-TRANSFER ; FLUID-FLOW ; WELD POOL ; NUMERICAL-SIMULATION ; DEPOSITION ; TEMPERATURE ; OXYGEN ; MODEL ; CONVECTION ; TENSION
WOS Research AreaThermodynamics ; Mechanics
WOS SubjectThermodynamics ; Mechanics
Funding OrganizationNational Natural Science Foundation of China(11272316 ; 11272317 ; 11502269)
DepartmentMAM激光智能制造工艺力学
Classification一类
Ranking1
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/70058
Collection先进制造工艺力学重点实验室
Corresponding AuthorYu, G; He, XL (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100049, Peoples R China.
Recommended Citation
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.
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