Comparative investigation between fiber laser and disk laser: Microstructure feature of 2219 aluminum alloy welded joint using different laser power and welding speed

He, Shufei; Liu, Liyuan; Zhao, Yanqiu; Kang, Yue; Wang, Feifan; Zhan, Xiaoli

doi:10.1016/j.optlastec.2021.107121

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…The distribution of Marangoni convection in the top half of the molten pool puts the heterogeneous point towards the fusing line, where the metal nucleates and increases as the temperature declines. Owing to the higher temperature differential from the fusion line to the weld centre, the crystal grains develop towards the weld centre, generating columnar dendrites [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Nanomechanical, mechanical and microstructural characterization of electron beam welded Al2219-T6 tempered aerospace grade alloy: A comprehensive study

Hussain,

Shehbaz,

Alkahtani

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

Nanomechanical, mechanical and microstructural characterization of electron beam welded Al2219-T6 tempered aerospace grade alloy: A comprehensive study

Hussain,

Shehbaz,

Alkahtani

et al. 2024

Heliyon

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“…This observation can be explained by considering the aspects of grain coarsening and weld interface reduction. On one hand, coarser grains are generated in the fusion zone owing to the higher heat input caused by increased laser power, according to the research of He et al 31 and Xia et al 27 Moreover, given that the increase in heat input decreases the cooling rate, 32 a longer time is available for grain coarsening during solidification, which causes a reduction in tensile strength. On the other hand, a high heat input aggravates the evaporation loss of the weld material; consequently, the underfill of the weld bead increases.…”

Section: Resultsmentioning

confidence: 99%

Process parameter selection for laser welding of aluminium alloy from the perspective of energy effectiveness

Xiong

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Laser welding is an indispensable part of competitive manufacturing, but it has a critical issue with energy consumption. The existing literature is limited to the energy supplied to the laser-material interaction for the material welding, and the welding quality is not well considered for energy saving. To reduce the total energy consumption of laser welding without compromising the welding quality, this study investigates the effects of process parameters including the laser power, welding speed and focus position on the specific energy consumption (SEC), welding quality and related energy effectiveness (EE) of the laser welding of 6061 aluminium alloy. The results reveal that adjusting the laser power to improve the welding quality will inevitably lead to a significant increase in the SEC. Energy can be saved with a relatively stable welding quality by varying the welding speed, and the welding quality can be improved without appreciably increasing the energy consumption by setting the focus position to approximately −0.5 mm. The EE can be enhanced with a higher laser power within a moderate welding speed range at the negative focus position. A case demonstrated that with a reasonable process parameter configuration, an energy savings of 12.45% could be realised for laser welding, while the tensile strength was increased by 4.29%, and the weld bead integrity remained stable (a decrease of 0.11%).

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“…Because the temperature gradient in the weld centre is small, and undercooling is high, creating the conditions for the formation of fine equiaxed dendrites [37] [38]. The equiaxed zone could be formed because of the presence of the mentioned high melting temperature compounds and the influence of the undercooling [39]. The microstructure of the welded joint produced with a focusing current of 629 mA is given in Fig.…”

Section: Sem Analysismentioning

confidence: 99%

The influence of focusing current on the microstructure of 2219 high-strength aluminum alloy electron beam welded joints

Sahul,

Rusynyk

et al. 2024

Preprint

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The paper concerns the analysis of the influence of the focusing current on the microstructure of aluminum alloy welded joints produced by electron beam welding. 2219 high-strength aluminum copper alloy was used as the base material. 2219 aluminum alloy is extensively used in the aerospace industry due to its excellent mechanical properties, high strength-to-weight ratio, and good corrosion resistance. Fuselage skins, wing panels, and rocket fuel tanks are some of the applications of the mentioned alloy. Bead-on-plate welded joints were produced within the study. Focusing currents of 629, 634, 639, 644, and 649 mA were utilized. Focusing current 639 mA ensures a sharp focus. The higher focusing current resulted in the production of a smoother weld bead. The narrowest weld was recorded when 629 mA focusing current was used. In the case of focusing currents 639, 644, and 649 mA, it can be stated that the higher the focusing current, the narrower the weld root. Except for a slight deviation in the case of the 629 mA focusing current application, the higher the focusing current, the larger the cross-sectional area of weld metal. Furthermore, the higher the focusing current, i.e., set up the focus position above the surface of materials to be welded, the larger the dendrite size. The finest dendrites were observed in the case of 629 mA focusing current (under focusing of the electron beam). Contrarily, the coarsest dendrites were documented when the highest focusing current, i.e., 649 mA, was used (over-focusing of the electron beam).

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Comparative investigation between fiber laser and disk laser: Microstructure feature of 2219 aluminum alloy welded joint using different laser power and welding speed

Cited by 14 publications

References 17 publications

Nanomechanical, mechanical and microstructural characterization of electron beam welded Al2219-T6 tempered aerospace grade alloy: A comprehensive study

Nanomechanical, mechanical and microstructural characterization of electron beam welded Al2219-T6 tempered aerospace grade alloy: A comprehensive study

Process parameter selection for laser welding of aluminium alloy from the perspective of energy effectiveness

The influence of focusing current on the microstructure of 2219 high-strength aluminum alloy electron beam welded joints

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