Remote laser welding of Zn coated IF steel and 1050 aluminium alloy: processing, microstructure and mechanical properties

Kotadia, Hiren; Franciosa, Pasquale; Jabar, Sharhid; Ceglarek, Dariusz

doi:10.1016/j.jmrt.2022.05.041

Cited by 14 publications

(3 citation statements)

References 45 publications

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“…In the welding of aluminum/steel dissimilar metals, the research on laser welding processes faces a series of critical issues. Firstly, optimizing the selection of laser power and welding speed is necessary to achieve precise control of heat input, thereby reducing the influence of the heat-affected zone (HAZ) and thermal stress [7][8][9]. Secondly, by appropriately adjusting the defocus amount, energy distribution can be controlled, enabling optimized fusion of steel and aluminum materials and consequently enhancing the mechanical properties of the welded joint [10].…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of laser welding parameters for steel/Al based on Kriging-MSSA

Zhu,

Guo,

Zhang

et al. 2024

Weld World

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In the context of automotive lightweighting strategy, steel/aluminum hybrid structures are widely used in the automotive industry. To address the reliability of steel/aluminum dissimilar metal joints, this study conducted steel/aluminum dissimilar metal laser welding tests by Taguchi's design of experiments method and obtained relevant data. Based on the test results, a Kriging model with laser power, welding speed and defocusing amount as inputs, and base material deformation and welded joint tensile strength as outputs was established. In this paper, with the amount of deformation of base material and tensile strength of welded joints after welding as the optimization objectives, the optimization analysis is carried out by combining the Kriging model and the multi-objective bottled sea-sheath swarm optimization algorithm (MSSA). The results show that under the conditions of laser power of 450.47W, welding speed of 11.88mm/s, and defocusing amount of 5.34mm, the optimization objective reaches the optimal level, the base material warpage deformation is reduced by 22.33% compared with the pre-optimization, and the tensile strength of the welded joints is improved by 18.01%.

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Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of laser welding parameters for steel/Al based on Kriging-MSSA

Zhu,

Guo,

Zhang

et al. 2024

Weld World

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“…These laser beams irradiated with a non-defocused beam, along with 5-and 10-mm defocused beams at the specimen surface, delivering energy densities varying from 65 to 134 J/mm 2 , calculated based on Ref. [27]. These conditions represent an unexplored conditional combination between heat input and high-energy density, while recent previously mentioned studies approximately covered heat inputs from 25 to 220 J/mm and energy densities from 30 to 280 J/mm 2 [5,[15][16][17][18][19][20][21][22].…”

Section: Single-mode Fibre Laser Weldingmentioning

confidence: 99%

Liquation crack-free welding strategy for 247LC DS superalloy by control of pipeline diffusion via ultra-high-speed laser beam scanning

Chun

Jeong

Kim

et al. 2023

Science and Technology of Welding and Joining

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Under completely suppressed constitutional liquation of MC carbide, unexplored 247LC superalloy single-mode fibre laser welds experience unexpected liquation cracking. These cracks continuously propagate from a solidification crack, particularly at highly misoriented and epitaxially grown solidification grain boundaries, and dominated by pipeline diffusion of impurities. Two novel metallurgical preconditions were identified which, if satisfied, ensure complete suppression of liquation cracking of 247LC superalloy welds. These preconditions are (i) the constitutional liquation of MC carbide at the heat-affected zone and (ii) pipeline diffusion of impurities at the fusion zone. It is also highly recommended that the welding is carried out in a single directionally solidified grain under scanning conditions, avoiding the formation of highly misoriented solidification grain boundaries.

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“…This application, which can operate at higher speeds than conventional spot welding applications, has provided the ability to create a non-contact joint in a fraction of a second, without the need for ller wire and shielding gas atmosphere [6] [7] [8]. Due to these highly advantageous properties, RLW has been widely used in various industries such as automobile manufacturing, shipbuilding, bridge construction, electric vehicles and lightweight structures [9] [10]. In particular, demands such as weight reduction, improving fuel e ciency, and reducing vehicle emissions have led to increased interest in laser welding for joining aluminum alloy sheets [11] [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Beam Power on AA6082 Plates Joined by Wobbling Mode Remote Laser Welding

AVCI,

Franciosa

2024

Preprint

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The advancement of technology has led to an increased need for new materials, which has necessitated the development of new joining techniques. With the adaptation of advanced automation technology, remote laser welding, which has become increasingly widespread, has facilitated the joining of desired complex structures. In this context, the determination of the laser beam power, which is the locomotive of the welding parameters, before the joining process has played an important role in the weld quality. In this study, 2 mm thick AA6082 plates were joined with a wobling mode remote laser welding system using 4 kW, 3 kW and 2.5 kW laser beam powers. Except for the laser beam power, other parameters were optimized by preliminary studies. The welding process was performed in circular oscillation mode and the time-dependent motion of the laser beam was calculated in advance. The seam geometry, microstructure and hardness properties of the weld line initial, middle and end regions of each joining plate were investigated. As a result of the investigations, full penetration was achieved in the joints made with 4 kW and 3 kW laser powers, but the use of 4kW laser power reduced the weld quality. As a result of using 2.5 kw laser power, full penetration was not achieved and porosity formations were observed. In addition, seam geometry values, HAZ distance and compound dimensions close to the fusion line decreased and weld zone element values changed with decreasing laser power. The transformation in structural and elemental values caused regional hardness changes.

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Remote laser welding of Zn coated IF steel and 1050 aluminium alloy: processing, microstructure and mechanical properties

Cited by 14 publications

References 45 publications

Multi-objective optimization of laser welding parameters for steel/Al based on Kriging-MSSA

Multi-objective optimization of laser welding parameters for steel/Al based on Kriging-MSSA

Liquation crack-free welding strategy for 247LC DS superalloy by control of pipeline diffusion via ultra-high-speed laser beam scanning

Effect of Laser Beam Power on AA6082 Plates Joined by Wobbling Mode Remote Laser Welding

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