Knowledge Management System of Institue of Mechanics, CAS
| Role of Surface-Active Element Sulfur on Thermal Behavior, Driving Forces, Fluid Flow and Solute Dilution in Laser Linear Welding of Dissimilar Metals | |
Shu Z(舒壮); Yu G(虞钢) ; Dong BX(董斌鑫); He XL(何秀丽); Li ZY(李志永); Li SX(李少霞)
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| Source Publication | MATERIALS
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| 2023-04 | |
| Volume | 16Issue:7Pages:2609 |
| Abstract | Understanding heat and mass transfer and fluid flow in the molten pool is very helpful in the selection and optimization of processing parameters, and the surface-active element has an important effect on the heat and mass transfer in laser welding of dissimilar metals. A three-dimensional (3D) numerical model coupled with a sub-model of surface tension, which considers the influence of local temperature and the concentration of surface-active element sulfur at the gas/liquid surface, is used to analyze the thermal behavior, driving forces, fluid flow, and solute dilution during laser linear welding of 304SS and Ni. The relationship between surface tension, driving forces, and the temperature coefficient of surface tension with the spatial distribution of temperature and the surface-active element sulfur is quantitatively analyzed. The simulation results show that the molten pool is fully developed at 45 ms, and the collision of inward and outward convection, with the maximum velocity reaching 1.7 m/s, occurs at the isotherm with a temperature between 2200 K and 2500 K. The temperature-gradient term and concentration-gradient term of surface shear stress play different roles in different positions of the free surface. The local sulfur concentration changes the temperature sensitivity of the surface tension at different sides of the free surface and further determines the transition of convection. Complex fluid flow promotes solute dilution, and the distribution of solute becomes uniform from the front to the rear of the molten pool. The Ni element is transferred to 304SS mainly at the rear side. The work provides theoretical support for the control of joint quality by changing the content of surface-active elements in dissimilar welding. |
| Keyword | laser dissimilar welding surface-active element driving forces heat transfer mass transfer |
| DOI | 10.3390/ma16072609 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000968761200001 |
| Funding Organization | National Natural Science Foundation of China [12202448] ; High-level Innovation Research Institute Program of Guangdong Province [2020 B0909010003] ; Research Project of Guangdong Aerospace Research Academy [GARA2022001000] |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | He, XL ; Li, ZY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/92204 |
| Collection | 宽域飞行工程科学与应用中心 |
| Affiliation | 1.(Shu Zhuang, Yu Gang, Dong Binxin, He Xiuli, Li Zhiyong, Li Shaoxia) Chinese Acad Sci Inst Mech Beijing 100190 Peoples R China 2.(Shu Zhuang, Yu Gang, Dong Binxin, He Xiuli, Li Zhiyong, Li Shaoxia) Univ Chinese Acad Sci Sch Engn Sci Beijing 100190 Peoples R China 3.(Yu Gang) Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100190 Peoples R China 4.(Yu Gang, He Xiuli, Li Zhiyong, Li Shaoxia) Guangdong Aerosp Res Acad Guangzhou 511458 Peoples R China |
| Recommended Citation GB/T 7714 | Shu Z,Yu G,Dong BX,et al. Role of Surface-Active Element Sulfur on Thermal Behavior, Driving Forces, Fluid Flow and Solute Dilution in Laser Linear Welding of Dissimilar Metals[J]. MATERIALS,2023,16,7,:2609.Rp_Au:He, XL, Li, ZY |
| APA | 舒壮,虞钢,董斌鑫,何秀丽,李志永,&李少霞.(2023).Role of Surface-Active Element Sulfur on Thermal Behavior, Driving Forces, Fluid Flow and Solute Dilution in Laser Linear Welding of Dissimilar Metals.MATERIALS,16(7),2609. |
| MLA | 舒壮,et al."Role of Surface-Active Element Sulfur on Thermal Behavior, Driving Forces, Fluid Flow and Solute Dilution in Laser Linear Welding of Dissimilar Metals".MATERIALS 16.7(2023):2609. |
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| Jp2023A195.pdf（14474KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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