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Title:
Capillary convection in pulsed - butt welding of miscible dissimilar couple
Author: Hu YW(胡耀武); He XL(何秀丽); Yu G(虞钢); Zhao SS(赵树森)
Source: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
Issued Date: 2017-07-01
Volume: 231, Issue:13, Pages:2429-2440
Abstract: Pulsed laser butt welding of miscible dissimilar couple has been studied numerically based on a three-dimensional heat and mass transfer model. Driving forces of molten metal flow in the case of stainless steel and nickel are compared using dimensional analysis. Thermo-capillary convection due to surface temperature gradient is recognized as the dominating fluid flow. Temperature coefficients of surface tensions are varied to investigate the influences of the convection on heat and mass transfer phenomena in weld pool. The temperature fields at stainless steel and nickel sides are found to be asymmetric and are greatly affected by different Marangoni convections. Concentration of Ni increases as the temperature coefficient of surface tensions changes from negative to positive. The temperature coefficient of surface tension of stainless steel has greater impact on the weld pool configuration and element concentration than that of nickel. The obtained weld pool configurations are found to be dependent on Prandtl number and convection patterns.
Keyword: Laser welding ; dissimilar ; Marangoni convection ; heat transfer ; weld pool
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1177/0954406216637086
DOC Type: Article
WOS Subject: Engineering, Mechanical
WOS Subject Extended: Engineering
WOS Keyword Plus: HEAT-TRANSFER ; TEMPERATURE PROFILE ; SOURCE MODEL ; MOLTEN POOL ; LASER ; METAL ; ALLOY ; ALUMINUM ; STEEL ; FLOW
WOS ID: WOS:000404391100006
ISSN: 0954-4062
Funder: National Natural Science Foundation of China(11272317||11272316)
Department: MAM激光智能制造工艺力学
First Institution (Yes or Not): True
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60632
Appears in Collections:先进制造工艺力学重点实验室_期刊论文

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Recommended Citation:
Hu YW,He XL,Yu G,et al. Capillary convection in pulsed - butt welding of miscible dissimilar couple[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE,2017-07-01,231(13):2429-2440.
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