Dissimilar laser brazing of aluminum alloy and galvannealed steel and defect control using interlayer

Ogura, Tomo; Wakazono, Reiko; Yamashita, Shotaro; Saida, Kazuyoshi

doi:10.1007/s40194-020-00858-7

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…Although aluminum has a higher thermal conductivity and a lower absorption coefficient of laser irradiation, aluminum has a lower melting point and better wettability of solid steel in the liquid state. The tensile strength of joints obtained using such techniques reaches 150–160 MPa (75–85% of the base aluminum metal); such properties are acceptable for some structures [ 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ]. Additionally, the wettability of the upper and lower edges [ 18 , 26 , 27 ] and the IMC uniformity over the entire depth of the weld seam [ 33 ] play an important role for the mechanical properties of the joint.…”

Section: Laser Welding Of Aluminum Alloys To Steelmentioning

confidence: 99%

A Review: Laser Welding of Dissimilar Materials (Al/Fe, Al/Ti, Al/Cu)—Methods and Techniques, Microstructure and Properties

Kuryntsev

2021

Materials

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Modern structural engineering is impossible without the use of materials and structures with high strength and low specific weight. This work carries out a quantitative and qualitative analysis of articles for 2016–2021 on the topic of welding of dissimilar alloys. It is found that laser welding is most widely used for such metal pairs as Al/Fe, Al/Ti, and Al/Cu. The paper analyzes the influence of the basic techniques, methods, and means of laser welding of Al/Fe, Al/Ti, and Al/Cu on the mechanical properties and thickness of the intermetallic compound (IMC). When welding the lap joint or spike T-joint configuration of Al/Fe, it is preferable to melt the steel, which will be heated or melted, by the laser beam, and through thermal conduction, it will heat the aluminum. When welding the butt-welded joint of Al/Fe, the most preferable is to melt the aluminum by the laser beam (150–160 MPa). When welding the butt-welded joint of Al/Ti, it is possible to obtain the minimum IMC and maximum mechanical properties by offsetting the laser beam to aluminum. Whereas when the laser beam is offset to a titanium alloy, the mechanical properties are 40–50% lower than when the laser beam is offset to an aluminum alloy. When lap welding the Al/Cu joint, under the impact of the laser beam on the aluminum, using defocusing or wobbling (oscillation) of a laser beam, it is possible to increase the contact area of electrical conductivity with the tensile shear strength of 95–128 MPa.

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Section: Laser Welding Of Aluminum Alloys To Steelmentioning

confidence: 99%

A Review: Laser Welding of Dissimilar Materials (Al/Fe, Al/Ti, Al/Cu)—Methods and Techniques, Microstructure and Properties

Kuryntsev

2021

Materials

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“…A higher surface energy density clearly increases the thickness of the η phase at the interface. Under the same surface energy density, a Zn layer attached to the surface before processing significantly boosts the thickness of the η phase at the interface, exemplified by the results of Ogura et al [30], who imposed a 7.1 µm Zn layer. However, Al-1.88Si wire is used for wire filling connection where Si inhibits the growth of the η phase.…”

Section: Effect Of Zn Content and Surface Energy Density On η Phase T...mentioning

confidence: 86%

Effect of Zn on Phase Evolution and Shear Resistance of Stainless Steel and Aluminum Alloy Interface by Laser Cladding

Wang

Yin

et al. 2023

Coatings

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The connection between aluminum and iron alloys is of immense significance in the pursuit of lightweight industrial products. However, the Fe-Al interface’s inherent weakness restricts its widespread application. This study investigates the impact of Zn at the interface of Al-Fe laser cladding on the phase and mechanical properties of the interface. Specifically, we examine the influence of the applied Zn powder layer and alloying Zn layer on the morphology of the Fe-based cladding layer. The inclusion of Zn enhances the spreadability of the Fe-based cladding layer. Additionally, we elucidate the effect of Zn on the composition and phase of the Fe-Al laser cladding interface. Notably, the affinity between Zn and the η phase surpasses that of the θ phase, and an increased Zn content significantly thickens the η phase. Shear tests reveal that the failure mode of shear fracture encompasses both brittle and ductile fractures. Density functional theory (DFT) calculations indicate that Zn has a limited effect on the strength of the η phase but reduces the enthalpy of formation of the η phase. Our findings demonstrate that the alloyed Zn layer initially facilitates the formation of a continuous and uniform η layer, while an increased Zn content enhances and stabilizes the shear strength of the interface.

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“…Finally, they stated that the seam length per wetting angle ratio is directly proportional to the mechanical strength of the joints. Seeking for controlling porosity formation due to zinc evaporation in dissimilar joints of 5052 aluminum alloy to galvanized SPCC steel, Ogura et al [78] proposed to insert a 50 µm-thick Ti interlayer between the dissimilar sheets. Although thermal deformation of Ti insert was observed, porosity was significantly suppressed, resulting in much better mechanical performance in comparison to the joints without the Ti insert.…”

Section: Lap Jointsmentioning

confidence: 99%

Recent Developments in Laser Welding of Aluminum Alloys to Steel

Wallerstein

Salminen

Lusquiños

et al. 2021

Metals

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The development of high-performance dissimilar aluminum–steel joints is necessary to promote the feasibility of multi-material design and lightweight manufacturing. However, joining aluminum to steel is a challenging task mainly due to the formation of brittle intermetallic compounds (IMC) at the joint interface. Laser welding is considered a very promising joining process for dissimilar materials, although its application in industry is still limited by the insufficient mechanical performance of the joints. The present paper aims to give a comprehensive review of relevant recent research work on laser joining of aluminum to steel, contributing to highlighting the latest achievements that could boost acceptance of laser joining of dissimilar materials by the modern industries. To this end, the most important challenges in laser joining of aluminum to steel are presented, followed by recent approaches to overcome these challenges, the state-of-art of comprehension of IMC formation and growth, and the different strategies to minimize them.

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Dissimilar laser brazing of aluminum alloy and galvannealed steel and defect control using interlayer

Cited by 9 publications

References 27 publications

A Review: Laser Welding of Dissimilar Materials (Al/Fe, Al/Ti, Al/Cu)—Methods and Techniques, Microstructure and Properties

A Review: Laser Welding of Dissimilar Materials (Al/Fe, Al/Ti, Al/Cu)—Methods and Techniques, Microstructure and Properties

Effect of Zn on Phase Evolution and Shear Resistance of Stainless Steel and Aluminum Alloy Interface by Laser Cladding

Recent Developments in Laser Welding of Aluminum Alloys to Steel

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