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Numerical study of heat transfer and solute distribution in hybrid laser-MIG welding
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
Corresponding AuthorYu, Gang(gyu@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
Source PublicationINTERNATIONAL JOURNAL OF THERMAL SCIENCES
2020-03-01
Volume149Pages:12
ISSN1290-0729
AbstractIn 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.
KeywordHybrid laser-MIG welding Aluminum alloy Heat transfer Solute distribution
DOI10.1016/j.ijthermalsci.2019.106182
Indexed BySCI ; EI
Language英语
WOS IDWOS:000505769100025
WOS KeywordPHASE CHANGE SYSTEMS ; SPECIES TRANSPORT ; CONTINUUM MODEL ; ALUMINUM-ALLOYS ; FLUID-FLOW ; SIMULATION ; SOLIDIFICATION ; MOMENTUM ; SURFACE
WOS Research AreaThermodynamics ; Engineering
WOS SubjectThermodynamics ; Engineering, Mechanical
Funding ProjectNational Natural Science Foundation of China[11672304] ; National Natural Science Foundation of China[11502269]
Funding OrganizationNational Natural Science Foundation of China
Classification一类
Ranking1
ContributorYu, Gang ; He, Xiuli
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81257
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
Recommended Citation
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.
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