| 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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| Source Publication | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
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| 2017-08-01 | |
| Volume | 86Pages:206-214 |
| ISSN | 0735-1933 |
| Abstract | 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. |
| Keyword | Additive Manufacturing Mass Transfer Surface-active Element Fluid Flow |
| DOI | 10.1016/j.icheatmasstransfer.2017.06.007 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000408183800024 |
| WOS Keyword | HEAT-TRANSFER ; FLUID-FLOW ; WELD POOL ; NUMERICAL-SIMULATION ; DEPOSITION ; TEMPERATURE ; OXYGEN ; MODEL ; CONVECTION ; TENSION |
| WOS Research Area | Thermodynamics ; Mechanics |
| WOS Subject | Thermodynamics ; Mechanics |
| Funding Organization | National Natural Science Foundation of China(11272316 ; 11272317 ; 11502269) |
| Department | MAM激光智能制造工艺力学 |
| Classification | 一类 |
| Ranking | 1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/70058 |
| Collection | 先进制造工艺力学实验室 |
| Corresponding Author | Yu, 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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| JouArt-2017-158.pdf（1595KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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