Friction Stir Welding and Hybrid Laser Welding Applied to 6056 Alloy

Haver, Wim Van; Stassart, X; Verwimp, Jo; Meester, B. de; Dhooge, Alfred

doi:10.1007/bf03263463

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Fusion welding alternatives to riveting had been abandoned many years ago due to heat-affected zone (HAZ) softening of the aluminum alloys involved [2,3]. The effect of precipitate dissolution and grain growth could be improved by postweld heat treatment (PWHT) [4][5][6], but practical limits to heat treating large subassemblies to the entire aircraft kept this solution from implementation. Therefore, fusion welding solutions were no longer considered, and new, solid-state welding solutions were investigated [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evaluation of dissimilar AA2024 and AA7050 aluminum joints made by corner stationary-shoulder friction stir welding

et al. 2022

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Fillet welds made by the corner stationary-shoulder friction stir welding process between AA7050-T7451 and AA2024-T4 sheets were characterized using different metallographic techniques and mechanical testing. Robotic welds of an aircraft’s skin-to-internal stiffeners were examined using Barker’s electrolytic and Keller’s etching techniques and correlated with electron backscattered diffraction results and energy-dispersive microprobe analysis. The composition and grain orientation maps and material flow lines demonstrated excellent weld quality in spite of the apparent inhomogeneities in the stir zone where mechanical mixing was complete. Welded joint efficiencies were in the 85–92% of the base metals and were acceptable in terms of resistance to crack initiation and propagation and corrosion resistance, even with softening of the heat-affected zones. It was concluded that several optical and electron microscopy techniques are needed to characterize these dissimilar aluminum welds fully and that post-weld mechanical and thermal treatments could even further improve their quality.

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Section: Introductionmentioning

confidence: 99%

Microstructure evaluation of dissimilar AA2024 and AA7050 aluminum joints made by corner stationary-shoulder friction stir welding

et al. 2022

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“…With the development of large-span space structure and emerging of new architecture, the connections of nodes between components become increasingly complex. In recent years, cast steel joints attract more and more attention in engineering for its advantages of isotropy, no residual stress, form flexible and good mechanical properties [1][2][3]. Cast steel joint formed by casting and avoid complex weld, which is greatly convenient in production and assembly; and with good ductility, toughness and weld ability for the material composition strictly limits the C, S, P content.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Combined and Tubular Cast Steel Joint on Mechanical Properties

Cai

2012

AMM

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In order to provide scientific basis for design and application of cast steel joint, this paper researches on mechanical properties of tubular-plate combined cast steel joint and tubular cast steel joint, which work in International Expo Center in the most unfavorable load condition. Finite Element Method (FEM) is employed to analysis the mechanical properties of the complex cast steel joint and an optimize solution is given. FEM based on large deformation theory and material nonlinearity obtained ultimate load and failure mode of the joints. The results show that, force transmission path of combined cast steel joint is complex for its cross-section shape of branch changes much; stress concentration is very obvious on the branch. In contrast, the force transmission path of tubular cast steel joint is clear and concise; the phenomenon of stress concentration alleviated effectively, the efficiency of material improved greatly; in the same amount of material, the ultimate bearing capacity of tubular cast steel joint increased by 9.5%. The joint design should follow the principle of simple and practical in premise of mechanical requirements.

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“…Both arc welding and electron beam welding have been mainly used as conventional welding processes for the aluminum alloys [2][3][4]. During the last two decades, significant and improved solutions for welding aluminum alloys were developed [5][6][7][8]. Although the use of highpower lasers for processing stainless steels and alloy steels has been extensively researched, studies on aluminum alloys are relatively limited.…”

Section: Introductionmentioning

confidence: 99%

Laser Beam Welding of AA5052, AA5083, and AA6061 Aluminum Alloys

El-Batahgy

Kutsuna²

2009

Advances in Materials Science and Engineering

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The present investigation was mainly concerned with characteristics of autogeneous laser butt welding of 2 mm thickness nonheat treatableAA5052-H12,AA5083-H12 and 2 mm, 3 mm thickness heat treatableAA6061-T6aluminum alloys. The effect of laser welding parameters, surface cleaning, filler wire addition, and backing strip on quality of laser welded joints was clarified using 5 kW laser machine. It was found that all the investigated alloys showed tendencies for porosity and solidification cracking, particularly, at high welding speed (4 m/min). Porosity was prevented by accurate cleaning of the base metal prior to welding and optimizing the flow rate of argon shielding gas. Solidification cracking was avoided through two different approaches. The first one is based on the addition of filler metal as reported in other research works. The other new approach is concerned with autogeneous welding using a backing strip from the same base metal, and this could be applicable in production. Preventing solidification cracking in both cases was related mainly to a considerable decrease in the stress concentration at the weld metal center as a result of improving the fusion zone profile. The implementation of the new approach could help in producing weldments with a better quality due to the absence of the filler metal, which is known as a source for hydrogen-related porosity. It can also have a positive economic aspect concerning the manufacturing cost since welding is done without the addition of filler metal. Not only quality and economic positive aspects could be achieved, but also high productivity is another feature since high quality autogeneous weldments were produced with high welding speed, 6 m/min. Hardness measurements and tensile test of AA6061 alloy welds indicated a remarkable softening of the fusion zone due to dissolution of the strengthening precipitates, and this was recovered by aging treatment after welding. For alloys AA5052 and AA5083, softening of the fusion zone due to the loss of its work-hardened condition was much less in comparison with AA6061 alloy.

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Friction Stir Welding and Hybrid Laser Welding Applied to 6056 Alloy

Cited by 6 publications

References 7 publications

Microstructure evaluation of dissimilar AA2024 and AA7050 aluminum joints made by corner stationary-shoulder friction stir welding

Microstructure evaluation of dissimilar AA2024 and AA7050 aluminum joints made by corner stationary-shoulder friction stir welding

A Comparison of Combined and Tubular Cast Steel Joint on Mechanical Properties

Laser Beam Welding of AA5052, AA5083, and AA6061 Aluminum Alloys

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