Effect of dual laser beam on dissimilar welding-brazing of aluminum to galvanized steel

Mohammadpour, Masoud; Yazdian, Nima; Yang, Guang; Wang, Huiping; Carlson, Blair E.; Kovacevic, Radovan

doi:10.1016/j.optlastec.2017.07.035

Cited by 71 publications

(10 citation statements)

References 34 publications

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“…As the laser power increased from 1130 to 1230 W, the weld seam became wider and fuller, as displayed in Figure 9 b–d. This is because the larger the laser power, the larger the size of the molten pool, the stronger the wetting and spreading ability, and the wider and fuller the weld seam naturally is [ 18 , 26 ]. Moreover, a groove formed at the bottom of the weld seam under the laser irradiation and gradually deepened as the laser power increased, as shown in Figure 9 .…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, many researchers have tried to use brazing, diffusion welding [ 7 , 8 ], explosive welding [ 9 , 10 , 11 , 12 ], friction welding [ 13 ], and friction stir welding [ 14 , 15 , 16 , 17 ] to connect titanium alloy and aluminum alloy. However, these solid state welding methods are usually limited by the structure size and shape configuration of the joints, so only simple geometric shapes can be welded, such as overlap and butt joints [ 18 , 19 ]. Compared with other welding methods, laser welding is widely used in welding of dissimilar metals because of the high thermal density and heat concentration, fast processing speed, small thermal deformation, and low pollution [ 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

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The Study on Mechanical Strength of Titanium-Aluminum Dissimilar Butt Joints by Laser Welding-Brazing Process

et al. 2019

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Laser welding–brazing of 5A06 aluminum to Ti6Al4V titanium in a butt configuration was carried out to discuss the influences of welding parameters on dissimilar joint properties. The effects of laser offset, welding speed, and laser power on the spreading length of the molten aluminum liquid, interface fracture zone width (IFZW), fracture roughness, intermetallic compounds (IMCs) thickness, and tensile strength were also investigated. The microstructure and fracture of the joint were also studied. The results show that the tensile strength of the joint is not only influenced by the thickness and type of IMCs, but also influenced by the spreading ability of the aluminum liquid, the fracture area broken at the Ti/fusing zone (FZ) interface, and the relative area of the brittle and ductile fracture in FZ. A dissimilar butt joint with an IMC thickness of 2.79 μm was obtained by adjusting the laser offset, welding speed, and laser power to 500 μm, 11 mm/s and 1130 W, respectively. The maximum tensile strength of the joint was up to 183 MPa, which is equivalent to 83% of the tensile strength of the 5A06 aluminum alloy.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Study on Mechanical Strength of Titanium-Aluminum Dissimilar Butt Joints by Laser Welding-Brazing Process

et al. 2019

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“…However, these studies reported on dual-beam laser welding of steel/Al joints were limited to the tandem configuration. In addition, one new piece of research investigated the effect of dual-beam modes between tandem and side-by-side configuration on welding of steel/Al joints [38], indicating that the side-by-side configuration offered some superiority over the tandem one. This cited study has yielded some important knowledge on the possible use of dual-beam laser welding of steel/Al joints with side-by-side configuration, but the relationship between the welding parameters and weld shape have not been yet examined.…”

Section: Introductionmentioning

confidence: 99%

Welding of Dissimilar Steel/Al Joints Using Dual-Beam Lasers with Side-by-Side Configuration

Cui

Chen

et al. 2018

Metals

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Welding of dissimilar steel/Al lapped joints of 1.5 mm in thickness was carried out by using dual-beam laser welding with side-by-side configuration. The effect of the major process parameters including the dual-beam power ratio of (Rs) and dual-beam distance (d1) on the steel/Al joint characteristics was investigated concerning the weld shape, interface microstructures, tensile resistance and fracture behavior. The results show that dual-beam laser welding with side-by-side configuration produces soundly welded steel/Al lapped joints free of welding defects. The processing parameters of Rs and d1 have a great influence on the weld appearance, the weld penetration in the Al alloy side (P2) and the welding defects. Variation in the depth of the P2 and the locations at the Al/weld interface cause heterogeneous microstructures in the morphology and the thickness of the intermetallic compound (IMC) layers. In addition, electron back scattered diffraction (EBSD) phase mapping reveals that the IMC layer microstructures formed at the Al/weld interface include the needle-like θ-Fe4Al13 phases and compact lath η-Fe2Al5 layers. Some very fine θ-Fe4Al13 and η-Fe2Al5 phases generated along the weld grain boundaries of the steel/Al joints are also confirmed. Finally, there is a matching relationship between the P2 and the tensile resistance of steel/Al joints, and the maximum tensile resistance of 109.2 N/mm is obtained by the steel/Al joints produced at the Rs of 1.50 during dual-beam laser welding with side-by-side configuration. Two fracture path modes have taken place depending on the P2, and relatively high resistance has been achieved for the steel/Al joints with an optimum P2.

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“…Recently, laser welding has gained popularity because of flexibility, ease of automation, high welding speed, high power density, small heat affected zone (HAZ), high weld bead depth-to-width ratio and low thermal distortion of the workpiece. So, laser welding has been considered potentially replace with other commonly used fusion welding techniques such as resistance and arc welding (Sharma and Molian 2011; Yuce et al 2017;Mohammadpour et al 2018 ). Also, pulsed Nd:YAG laser welding has several advantages over the other laser sources because of control the laser parameters precisely including pulse duration and pulse frequency (Hekmatjou and Naffakh-Moosavy 2018).…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of similar and dissimilar laser welds of dp600 and dp1000 steel sheets used in the automotive industry

Tunçel

Aydın

Çetin

2021

Turkish Journal of Engineering

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Dual-phase (DP) steel sheets are the most widely used steel group in the automotive industry. When these steel sheets are used in car body components, welding is inevitably needed during the manufacturing process. Although the resistance spot welding (RSW) is the most widely used welding method in the automotive industry, the newly popular laser welding has gained more importance in the welding of these steel grades in recent years. In this work, the DP600 and DP1000 steel sheets were joined as double-sided with the pulsed Nd: YAG (Neodymiumdoped Yttrium Aluminum Garnet (Y3Al5O12)) laser welding. Performing similar or dissimilar weld of DP steel sheets is an inevitable demand in the modern automotive industry. So, in this study similar (DP600-DP600, DP1000-DP1000) and dissimilar (DP600-DP1000) steel sheets were welded in the flat position with the butt joint. In order to evaluate welding performance, microstructural studies and mechanical tests were performed, and experiments carried out in this context include optical microscope studies, tensile tests and Vickers microhardness measurements. The tensile strength of the similar welded joints is a little bit lower than the base metals (BM). But, for dissimilar weld, the tensile strength is even lower than DP600-DP600 joint. And the microstructure of the welded joints are composed of martensite, retained austenite and bainite in the fusion zone and a mixture of martensite, bainite, ferrite, retained austenite and tempered martensite in heat affected zone (HAZ).

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Effect of dual laser beam on dissimilar welding-brazing of aluminum to galvanized steel

Cited by 71 publications

References 34 publications

The Study on Mechanical Strength of Titanium-Aluminum Dissimilar Butt Joints by Laser Welding-Brazing Process

The Study on Mechanical Strength of Titanium-Aluminum Dissimilar Butt Joints by Laser Welding-Brazing Process

Welding of Dissimilar Steel/Al Joints Using Dual-Beam Lasers with Side-by-Side Configuration

Microstructure and mechanical properties of similar and dissimilar laser welds of dp600 and dp1000 steel sheets used in the automotive industry

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