Role of Surface-Active Element Sulfur on Thermal Behavior, Driving Forces, Fluid Flow and Solute Dilution in Laser Linear Welding of Dissimilar Metals

doi:10.3390/ma16072609

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	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)
发表期刊	MATERIALS
	2023-04
卷号	16 期号:7 页码:2609
摘要	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.
关键词	laser dissimilar welding surface-active element driving forces heat transfer mass transfer
DOI	10.3390/ma16072609
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000968761200001
项目资助者	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]
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	He, XL ; Li, ZY
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/92204
专题	宽域飞行工程科学与应用中心
作者单位	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
推荐引用方式 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.
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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