Surface-active element transport and its effect on liquid metal flow in laser-assisted additive manufacturing
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 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) |
| 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. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。