The aluminum alloys has been increasingly used in the automotive industry in order to reduce the vehicles” weight and improve the fuel efficiency. When joining the aluminum alloys, one of the big challenges is the formation of porosity, which deteriorates the mechanical properties of welds. In this study, the lap welding was conducted on an aluminum alloy 5754 metal sheets with a thickness of 2 mm. The effects of various laser welding parameters on the weld quality were investigated. The porosity content was measured by X-ray inspections. A porosity-free weld was achieved even in the condition of partial penetration. The key is to control the solidification duration of molten pool. When the solidification duration of molten pool is large enough, more bubbles can escape from the molten pool and less or even none remain as porosity.
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ICALEO 2011: 30th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing
October 23–27, 2011
Orlando, Florida, USA
ISBN:
978-0-912035-94-9
PROCEEDINGS PAPER
Mechanisms of the porosity formation during the fiber laser lap welding of Al 5754 sheets
Jun Wang;
Jun Wang
1
School of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan
, Hubei, 430074, P.R.China
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Chunming Wang;
Chunming Wang
1
School of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan
, Hubei, 430074, P.R.China
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Shanglu Yang;
Shanglu Yang
2
GM China Science Lab
, Shanghai, 201206, P.R.China
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Jing Zhang;
Jing Zhang
2
GM China Science Lab
, Shanghai, 201206, P.R.China
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Guozheng Wang;
Guozheng Wang
1
School of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan
, Hubei, 430074, P.R.China
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Xiyuan Hu;
Xiyuan Hu
1
School of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan
, Hubei, 430074, P.R.China
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Shengfu Yu
Shengfu Yu
1
School of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan
, Hubei, 430074, P.R.China
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Published Online:
October 01 2011
Citation
Jun Wang, Chunming Wang, Shanglu Yang, Jing Zhang, Guozheng Wang, Xiyuan Hu, Shengfu Yu; October 23–27, 2011. "Mechanisms of the porosity formation during the fiber laser lap welding of Al 5754 sheets." Proceedings of the ICALEO 2011: 30th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. ICALEO 2011: 30th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Orlando, Florida, USA. (pp. pp. 1261-1266). ASME. https://doi.org/10.2351/1.5062214
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