Laser Overlap Welding of Zinc-coated Steel on Aluminum Alloy

Kashani, Hamed Tasalloti; Kah, Paul; Martikainen, Jukka

doi:10.1016/j.phpro.2015.11.037

Cited by 24 publications

(15 citation statements)

References 33 publications

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“…Beyond that, Mrzljak et al used magnetic pulse welding in order to optimize the process parameters for joining steel to aluminum [15]. In addition to process modification, the influence of filler and coating materials was also investigated in the literature [16][17][18][19]. For example, a zinc coating on the steel sheets led to improved strength properties during resistance spot welding compared to uncoated sheets, as Eichhorn et al showed [20].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Influences of Steel-Aluminum Dissimilar Joints with Intermediate Zinc Layer

Bick

Heuler

Treutler

et al. 2020

Metals

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Brittle intermetallic phases are formed when steel and aluminum are joined. Therefore, it is difficult to use this combination of materials when applying the multimaterial design in the construction of load-adapted and weight-adapted structures. In order to largely avoid the formation of these brittle phases, joining processes based on diffusion processes, such as composite forging, depict a good solution approach. The materials are joined in a solid state. Furthermore, zinc additives are used to create the joint. Zinc forms a compound with both steel and aluminum without the formation of brittle phases. By combining the composite forging process with zinc additives, strength values of 26 N/mm2 can be reached. This is higher, in comparison to former investigations of resistance spot welded and clinched joints. The joint properties depend on the composition of the zinc interlayer. Small amounts of magnesium in the zinc interlayer affected the strength and ductility values. While the strength decreased by about 30% in contrast to the zinc layer without magnesium, the ductility increased by 60%. This effect was probably due to the metallurgical impact of the alloying elements on phase formation, as could be shown by energy dispersive X-ray spectroscopy (EDX) analyses of the joint zones. Thereby, it was shown that the brittle intermetallic phases are located only in small areas.

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Section: Introductionmentioning

confidence: 99%

Characterization of Influences of Steel-Aluminum Dissimilar Joints with Intermediate Zinc Layer

Bick

Heuler

Treutler

et al. 2020

Metals

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“…They showed that a narrow heat-affected zone with a low proportion of intermetallic phases is as damaging to the strength as large distinct phases themselves [4,5]. Kashani et al showed that the strength of laser overlap welded joints increases when the size of the intermetallic phase seam is less than 10 μm [6]. Zhang et al investigated the influence of a zinc layer between aluminum and steel by using friction stir welding [7].…”

Section: Introductionmentioning

confidence: 99%

Soldering of steel sheets and zinc-coated aluminum by hybrid composite forging

2020

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In lightweight construction, light metals like aluminum are used in addition to high-strength steels. However, a welded joint of aluminum and steel leads to the precipitation of brittle, intermetallic phases and contact corrosion. Nevertheless, to use the advantages of this combination in terms of weight saving, composite hybrid forging has been developed. In this process, an aluminum solid part and a steel sheet were formed in a single step and joined at the same time with zinc as brazing material. For this purpose, the zinc was applied by hot dipping on the aluminum in order to produce a Brazing via these layers in a forming process, under pressure and heat. Due to the formed intermediate layer of zinc, the formation of the Fe-Al intermetallic phases and the contact corrosion are excluded. By determining the mathematical relationships between joining parameters and the mechanical properties of the joint, the strength of a specific joint geometry could be adjusted to reach the level of conventional joining techniques. In addition to the presentation of the joint properties, the influence of the joining process on the structure of the involved materials will be shown. Furthermore, the failure behavior under static tensile and shear stress will be shown.

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“…However, there are two major issues that have limited the welding brazing of steel and aluminum; one is the poor wetting ability of weld pool, and the other is the generation of brittle and hard intermetallic compounds (IMC), which can introduce deleterious effect on the welded joints [12]. At present, the main welding heat sources used in the aluminum/steel welding brazing are laser and arc, the welding method which uses the laser as the heat source can achieve high efficiency and accurate welding [13,14]. But the laser source is concentrated at one point, and the capability of wetting and spreading of the molten pool becomes poor [15].…”

Section: Introductionmentioning

confidence: 99%

Arc-Assisted Laser Welding Brazing of Aluminum to Steel

Fan

Huang

et al. 2019

Metals

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Using laser beam as main heat source, and trailing arc as an assisted role, aluminum alloy was joined to galvanized steel in a butt configuration. Under suitable welding parameters, a sound welding seam was obtained. The interface intermetallic compounds layer and wetting behavior of weld joint were studied. The assisted arc can improve the wetting and spreading ability of weld pool duo to large temperature field. There are two different types of IMCs: near to the steel side one is Fe2Al5 with tooth-like shape and near to the weld seam side is the other one Fe4Al13 with flocculent-like shape. The highest tensile strength can reach 163 MPa when the fracture occurred at the weld seam.

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Laser Overlap Welding of Zinc-coated Steel on Aluminum Alloy

Cited by 24 publications

References 33 publications

Characterization of Influences of Steel-Aluminum Dissimilar Joints with Intermediate Zinc Layer

Characterization of Influences of Steel-Aluminum Dissimilar Joints with Intermediate Zinc Layer

Soldering of steel sheets and zinc-coated aluminum by hybrid composite forging

Arc-Assisted Laser Welding Brazing of Aluminum to Steel

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