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Title:
Comparative study of hybrid laser-MIG leading configuration on porosity in aluminum alloy bead-on-plate welding
Author: Miao HB(苗海滨); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Chen XY(陈旭阳)
Source: INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
Issued Date: 2017-07-01
Volume: 91, Issue:5-8, Pages:2681-2688
Abstract: Laser-metal inert gas (MIG) welding is a promising welding technology, which presents many attractive properties. However, porosity still remains a serious problem in laser-MIG welding of aluminum. In this experimental study, the effect of leading configuration on porosity formation and distribution in laser-MIG bead-on-plate welding of A7N01 alloy was investigated. Experiments on arc current, welding speed, and arc configuration were performed comparatively for two leading configurations, respectively. The welds were analyzed with X-ray photographs and cross-section observations. Pores in laser-MIG-welded samples were mainly keyhole-induced. The concept of porosity area fraction was used to evaluate the severity of pore defect. The maximum porosity area fraction presented at different arc currents in the two leading configurations (in laser leading welding, it is 150 A, while in arc leading welding, it is 110 A). With welding speed increasing, porosity area fraction decreased. Bubble escape condition was deduced and used to discuss the probable mechanism of the effect of leading configuration on pore formation. The results showed that leading configuration was considerable in porosity minimization and prevention.
Keyword: Laser-MIG hybrid welding ; A7N01 aluminum alloy ; Leading configuration ; Porosity
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1007/s00170-016-9917-1
DOC Type: Article
WOS Subject: Automation & Control Systems ; Engineering, Manufacturing
WOS Subject Extended: Automation & Control Systems ; Engineering
WOS Keyword Plus: FORMATION MECHANISMS ; FIBER LASER ; ARC ; KEYHOLE ; MICROSTRUCTURE ; PARAMETERS ; REDUCTION ; DYNAMICS ; AA5083 ; FLOW
WOS ID: WOS:000404132100098
ISSN: 0268-3768
Funder: National Natural Science Foundation of China(11272316||11272317||11502269)
Department: MAM激光智能制造工艺力学
First Institution (Yes or Not): True
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Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60637
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:
Miao HB,Yu G,He XL,et al. Comparative study of hybrid laser-MIG leading configuration on porosity in aluminum alloy bead-on-plate welding[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,2017-07-01,91(5-8):2681-2688.
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