Numerical study of heat transfer and solute distribution in hybrid laser-MIG welding
文献类型：期刊论文
| 作者 | Chen XY(陈旭阳)1,2; Yu G(虞钢)1,2 ; He XL(何秀丽)1,2; Li SX(李少霞)1,2; Li ZY(李志永)1,2
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| 刊名 | INTERNATIONAL JOURNAL OF THERMAL SCIENCES
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| 出版日期 | 2020-03-01 |
| 卷号 | 149页码:12 |
| 关键词 | Hybrid laser-MIG welding Aluminum alloy Heat transfer Solute distribution |
| ISSN号 | 1290-0729 |
| DOI | 10.1016/j.ijthermalsci.2019.106182 |
| 通讯作者 | Yu, Gang(gyu@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn) |
| 英文摘要 | In the quest for the transport mechanism in the molten pool during hybrid laser-MIG welding of aluminum alloy, an improved three-dimensional numerical model is developed. A modified model for laser heat source is utilized to investigate the energy absorption mechanism in keyhole. Some driving forces are considered to simulate the fluid flow, such as electromagnetic force, surface tension and buoyancy. The effects of arc pressure and droplet impact are taken into account to track the free surface. Several dimensionless numbers are utilized to analyze the relative importance of driving forces. The temperature field, liquid velocity field and magnesium and zinc distribution are numerically and experimentally studied. Results shows that the laser beam create a great impression on the heat transfer, fluid flow, solute distribution and weld bead geometry. In MIG welding, there is an insufficient mixing zone at the front of the pool, while the solute distribution in hybrid laser-MIG welding is observed more uniform. Magnesium and zinc are found concentrated in lower and upper part of the molten pool, respectively. The mathematical model is well validated by the experimental observations, and the calculated element distribution agrees well with the experimental measurements. Furthermore, the improved model provides an effective method for parametric optimization to improve the properties of hybrid laser-MIG welding joints. |
| 分类号 | 一类 |
| WOS关键词 | PHASE CHANGE SYSTEMS ; SPECIES TRANSPORT ; CONTINUUM MODEL ; ALUMINUM-ALLOYS ; FLUID-FLOW ; SIMULATION ; SOLIDIFICATION ; MOMENTUM ; SURFACE |
| 资助项目 | National Natural Science Foundation of China[11672304] ; National Natural Science Foundation of China[11502269] |
| WOS研究方向 | Thermodynamics ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000505769100025 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Yu, Gang ; He, Xiuli |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/81256]  |
| 专题 | 力学研究所_先进制造工艺力学重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Chen XY,Yu G,He XL,et al. Numerical study of heat transfer and solute distribution in hybrid laser-MIG welding[J]. INTERNATIONAL JOURNAL OF THERMAL SCIENCES,2020,149:12. |
| APA | 陈旭阳,虞钢,何秀丽,李少霞,&李志永.(2020).Numerical study of heat transfer and solute distribution in hybrid laser-MIG welding.INTERNATIONAL JOURNAL OF THERMAL SCIENCES,149,12. |
| MLA | 陈旭阳,et al."Numerical study of heat transfer and solute distribution in hybrid laser-MIG welding".INTERNATIONAL JOURNAL OF THERMAL SCIENCES 149(2020):12. |
入库方式： OAI收割
来源：力学研究所
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