| 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.
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| 发表期刊 | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
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| 2017-08-01
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| 卷号 | 86页码:206-214 |
| ISSN | 0735-1933
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| 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. |
| 关键词 | Additive Manufacturing
Mass Transfer
Surface-active Element
Fluid Flow
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| DOI | 10.1016/j.icheatmasstransfer.2017.06.007
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| URL | 查看原文
|
| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000408183800024
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| 关键词[WOS] | HEAT-TRANSFER
; FLUID-FLOW
; WELD POOL
; NUMERICAL-SIMULATION
; DEPOSITION
; TEMPERATURE
; OXYGEN
; MODEL
; CONVECTION
; TENSION
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| WOS研究方向 | Thermodynamics
; Mechanics
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| WOS类目 | Thermodynamics
; Mechanics
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| 项目资助者 | National Natural Science Foundation of China(11272316
; 11272317
; 11502269)
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| 课题组名称 | MAM激光智能制造工艺力学
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| 论文分区 | 一类
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| 力学所作者排名 | 1
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/70058
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| 专题 | 先进制造工艺力学实验室
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| 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.
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| 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.
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| 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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