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Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel
Li ZY(李志永)1,2; Yu G(虞钢)1,2,3; He XL(何秀丽)1,2; Li SX(李少霞)1,2; Tian CX(田崇鑫)1,2; Dong BX1,2
Corresponding AuthorYu, Gang(gyu@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
Source PublicationOPTICS AND LASER TECHNOLOGY
2020-03-01
Volume123Pages:11
ISSN0030-3992
AbstractA transient three-dimensional thermal-fluid-metallurgy model was proposed to study the surface tension driven flow and welding metallurgical behavior during laser linear welding of 304 stainless steel. Numerical simulation and experimental method were both used to investigate the thermal behavior, surface tension driven flow, driving mechanism and solidification characteristics. The temperature related driving force was qualitatively analyzed, and surface tension and surface shear stress were quantitatively studied. Numerical method and dimensional analysis were also carried out to understand the importance of different driving forces, respectively. The metallurgical model was sequentially coupled to the thermal-fluid model to calculate four solidification parameters. Temperature gradient was observed to be much larger at the front of the melt pool due to the effect of thermal conductivity, and decreased from center to the periphery. Both the surface tension and surface tension driven flow were found smaller in the central area. The maximum shear stress may reach 2500 N/m(2) and pushed an intense outward convection. The solidification parameters were used to predict the solidified morphology, and the prediction was well validated by experimental results. The obtained basic conclusions in this work demonstrated that this study of thermal-fluid-metallurgical behavior could provide an improved understanding of the surface tension driven flow and solidification behavior inside the melt pool of welding and additive manufacturing process.
KeywordSurface tension Driving force Fluid flow Solidification behavior Additive manufacturing
DOI10.1016/j.optlastec.2019.105914
Indexed BySCI ; EI
Language英语
WOS IDWOS:000504504400030
WOS KeywordNUMERICAL-SIMULATION ; THERMAL-BEHAVIOR ; FLUID-FLOW ; PHASE-CHANGE ; CONVECTION ; METAL ; HEAT ; ARC ; TRANSPORT ; DYNAMICS
WOS Research AreaOptics ; Physics
WOS SubjectOptics ; Physics, Applied
Funding ProjectNational Natural Science Foundation of China[11272316] ; National Natural Science Foundation of China[11272317] ; National Natural Science Foundation of China[11672304] ; National Natural Science Foundation of China[11502269] ; plan of Beijing Municipal Commission of Science and Technology[Z181100003818015] ; Chinese Academy of Sciences[yz201636]
Funding OrganizationNational Natural Science Foundation of China ; plan of Beijing Municipal Commission of Science and Technology ; Chinese Academy of Sciences
Classification二类
Ranking1
ContributorYu, Gang ; He, Xiuli
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81285
Collection先进制造工艺力学实验室
Affiliation1.Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li ZY,Yu G,He XL,et al. Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel[J]. OPTICS AND LASER TECHNOLOGY,2020,123:11.
APA 李志永,虞钢,何秀丽,李少霞,田崇鑫,&Dong BX.(2020).Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel.OPTICS AND LASER TECHNOLOGY,123,11.
MLA 李志永,et al."Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel".OPTICS AND LASER TECHNOLOGY 123(2020):11.
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