Laser welding of steel to aluminium: Thermal modelling and joint strength analysis

Meco, Sónia; Cozzolino, Luis Daniel; Ganguly, Saibal; Williams, Stewart; McPherson, Norman

doi:10.1016/j.jmatprotec.2017.04.002

Cited by 46 publications

(26 citation statements)

References 17 publications

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“…The low strength of 286 MPa is shown by DB150. The poorly bonded joint is attributed to the small partially mixed interfacial/bonding area at the molten pool by the insufficient melting of the substrate [18]. For DB180 and DB210, with laser powers of 180 and 210 W, higher strengths of 398 and 350 MPa are recorded, respectively.…”

Section: Tensile Properties Before and After Pwhtmentioning

confidence: 99%

Laser deposition additive manufacturing of 17-4PH stainless steel on Ti-6Al-4V using V interlayer

Adomako

Noh

et al. 2019

Materials Research Letters

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For the first time, additive manufacturing was used to obtain a strong joint (bonding strength > 200 MPa) between stainless steel and Ti-6Al-4V using a V interlayer. The V interlayer applied via solid-state joining prevented the formation of brittle intermetallic phases more effectively than a V interlayer deposited by a liquid-state process. The microstructure and strength of the joint interface depended on the laser power and scan speed. The joint strength decreased with increasing annealing time, especially after 4 and 24 h, demonstrating the presence of the Fe-VCr σ-phase. IMPACT STATEMENT For the first time, an additive manufacturing process using a V interlayer successfully produced a hybrid structure of stainless steel and Ti-6Al-4V alloy.

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Section: Tensile Properties Before and After Pwhtmentioning

confidence: 99%

Laser deposition additive manufacturing of 17-4PH stainless steel on Ti-6Al-4V using V interlayer

Adomako

Noh

et al. 2019

Materials Research Letters

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“…However, in no joining process could the formation of intermediate phases during metallic continuity joining be avoided. Therefore, a recommendation was made to keep the characteristic phase seam smaller than 10 µm [26]. A further approach is compound forging.…”

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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“…Meco et al investigated the influence of the intermetallic phases and the width of the heat-affected zone as a function of the temperature during the laser beam welding of aluminum and steel [3]. 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].…”

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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Laser welding of steel to aluminium: Thermal modelling and joint strength analysis

Cited by 46 publications

References 17 publications

Laser deposition additive manufacturing of 17-4PH stainless steel on Ti-6Al-4V using V interlayer

Laser deposition additive manufacturing of 17-4PH stainless steel on Ti-6Al-4V using V interlayer

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

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

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