Comparative study on successive and simultaneous double-sided laser beam welding of AA6056/AA6156 aluminum alloy T-joints for aircraft fuselage panels

Yang, Zhibin; Zhao, Xin; Wang, Tao; Cheng, Jin; Huang, Shiming; Wang, Yuxi; En, Zhang

doi:10.1007/s00170-018-1996-8

Cited by 17 publications

(6 citation statements)

References 22 publications

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“…It can be observed that, for both of the two hybrid welded joints, the micro-hardness values of the fusion zone and the heat affected zone decreased compared with that of the base material. Some existing research results show that the vaporization of alloying element and the grain size became larger, while the precipitates became less leaded to the reduction of the micro-hardness of the fusion zone and the heat affected zone, respectively [24,25,26]. As shown in Figure 8a,b, two distinct softening regions were identified in the heat affected zone of the two hybrid welded joints: one was in the partially melted zone because the partial melting of the grain boundaries resulted in the diffusion of strengthening alloying elements from solid phase to liquid phase with greater solubility [27]; the other was at a distance away from the fusion line (2.4–4.2 mm for laser-CMT hybrid welded joint and 5.8–8.8 mm for plasma-CMT hybrid welded joint), which, due to the obvious dissolution of β″ strengthening phases and the number of β″ phases, decreases substantially in this region [28].…”

Section: Resultsmentioning

confidence: 99%

Comparative Study on Welding Characteristics of Laser-CMT and Plasma-CMT Hybrid Welded AA6082-T6 Aluminum Alloy Butt Joints

et al. 2019

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Laser-CMT (Cold Metal Transfer) and plasma-CMT hybrid welding are two promising alternative joining technologies for traditional Metal-Inert-Gas (MIG) welding of the aluminum alloy joints in the high speed trains manufacturing industry. In this work, a comparative study on the weld formation, microstructure, micro-hardness, and mechanical properties of the butt joints in the two welding methods was conducted. The results indicate that the overall quality of the laser-CMT and plasma-CMT welds were good, especially of the laser-CMT hybrid weld, and the laser-CMT hybrid welding process needed a lower heat input. The width of the partially melted zone of the laser-CMT hybrid weld was narrower than that in the plasma-CMT hybrid weld. Micro-hardness test results show that two distinct softening regions were identified in the heat affected zone, and the micro-hardness values of each zone in the laser-CMT hybrid weld were lower than that in the plasma-CMT hybrid weld. The tensile strength of the laser-CMT hybrid welded joints was higher than that of the plasma-CMT hybrid welded joints, which could reach up to 79.4% and 73.7% of the base materials, respectively. All the fractures occurred in the softening region and exhibited a ductile shear fracture with a shear angle of approximately 45°. The fractographs manifested that the laser-CMT and plasma-CMT hybrid welded joints presented ductile fracture and ductile-brittle fracture features, respectively.

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Section: Resultsmentioning

confidence: 99%

Comparative Study on Welding Characteristics of Laser-CMT and Plasma-CMT Hybrid Welded AA6082-T6 Aluminum Alloy Butt Joints

et al. 2019

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“…There were two main reasons for the microhardness decrease in the weld seam: firstly, the microhardness of the filler wire was lower than that of the base material; secondly, the alloying elements were burned and lost during the welding process [1,36]. That the grain size became larger and the precipitates became fewer were the causes of the microhardness decrease in the heat-affected zone [37]. Overall, the microhardness values of each zone for the LPMHW joint were lower than that of the LCHW joint, and the microhardness values of the arc zone were also lower than that of the laser zone.…”

Section: Microhardness Distributionmentioning

confidence: 99%

“…By comparison, the width of the heat-affected zone of the LPMHW joint was larger than that of the LCHW joint. It was found that there were two softening regions in the affected zone of the two joints: one was in the partially melted zone because of the loss of strengthening alloying elements in this area [37,38], and the other was at a distance away from the fusion line due to the strengthening phases (β") being dissolved and substantially decreased in this area [39]. Furthermore, the second softening region was more prominent in the arc zone, and was also wider for the LPMHW joint compared with that of the LCHW joint.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Comparative Study of Laser-Arc Hybrid Welding for AA6082-T6 Aluminum Alloy with Two Different Arc Modes

Han¹,

Yang

Ma³

et al. 2020

Metals

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The effects of arc modes on laser-arc hybrid welding for AA6082-T6 aluminum alloy were comparatively studied. Two arc modes were employed: pulsed metal inert gas arc and cold metal transfer arc. The results indicated that joints without porosity, undercutting, or other defects were obtained with both laser-pulsed metal inert gas hybrid welding (LPMHW) and laser-cold metal transfer hybrid welding (LCHW). Spatter was reduced, and even disappeared, during the LCHW process. The sizes of equiaxed dendrites and the width of the partially melted zone in the LPMHW joint were larger than those in the LCHW joint. The microhardness in each zone of the LPMHW joint was lower than that of the LCHW joint. The softening region in the heat-affected zone of the LPMHW joint was wider than that of the LCHW joint. The tensile strength of the LCHW joint was higher than that of the LPMHW joint. For the two joints, the fractures all occurred in the softening region in the heat-affected zone, and the fracture morphologies showed ductile fracture features. The dimples in the fractograph of the LCHW joint were deeper than those of the LPMHW joint.

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“…The T-joints welding is currently gaining a lot of attention as an alternative to replace riveting as the primary fabrication method of skin-stringer formation [3][4]. The disadvantages of skin-stringer joints formation using rivets include increased weight, relatively high cost, and low productivity [5][6].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Double-Sided Metal Inert Gas Welding of AA5052 Aluminum Alloy T-Joints

Himarosa

Mudjijana

Adi

et al. 2022

MSF

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Simultaneous double-sided MIG welding as alternative method for joining the skin-stringer T-joints were investigated. The microstructure and mechanical properties of the welded joints were examined. Our study showed that a distance of 27-mm (torch to surface) results in the best weld appearance. Shorter distance produces higher heat input and causes the material stringers to melted with the filler, while longer distance increases the number of porosity and prevents the formation of a complete fusion zone.

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Comparative study on successive and simultaneous double-sided laser beam welding of AA6056/AA6156 aluminum alloy T-joints for aircraft fuselage panels

Cited by 17 publications

References 22 publications

Comparative Study on Welding Characteristics of Laser-CMT and Plasma-CMT Hybrid Welded AA6082-T6 Aluminum Alloy Butt Joints

Comparative Study on Welding Characteristics of Laser-CMT and Plasma-CMT Hybrid Welded AA6082-T6 Aluminum Alloy Butt Joints

Comparative Study of Laser-Arc Hybrid Welding for AA6082-T6 Aluminum Alloy with Two Different Arc Modes

Simultaneous Double-Sided Metal Inert Gas Welding of AA5052 Aluminum Alloy T-Joints

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