Effect of Ti foil on microstructure and mechanical properties of laser fusion welding of DP590 dual-phase steel to 6022 aluminum alloy

Li, Tian; Zhou, Dianwu; Yan, Youruiling; Zhang, Shumai; Liu, Jinshui

doi:10.1016/j.msea.2020.139929

Cited by 15 publications

(3 citation statements)

References 47 publications

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“…Based on the laser's high energy density, cleanliness, and low heat input characteristics, lasers have attracted a lot of attention in welding steel and aluminium [7, 8]. On the other hand, steel and aluminium is hard to be solid-solved, brittle intermetallic compounds (IMCs) are easily formed between them in welding process, and IMCs are the reason for reducing the mechanical properties of the joint [8, 9]. Therefore, Improving the metallurgical reaction of the steel-aluminium IMC layer has always become a bottleneck that researchers try to breakthrough.…”

Section: Introductionmentioning

confidence: 99%

Effect of nickel interlayer thickness on lap joint laser welding for aluminium-steel dissimilar materials

Zhou

et al. 2022

Science and Technology of Welding and Joining

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Laser lap welding of steel and aluminium with different thickness nickel foil was carried out. The effects of nickel interlayer thickness (T Ni ) on penetration depth, phase transition, mechanical properties were investigated. As the T Ni increased from 0 to 50 µm, the weld penetration depth was first increased and then decreased, reaching a maximum of 382 µm when T Ni was 20 µm. There was a γ -phase transformed from δ-ferrite in welded nugget and the transformation of high-temperature δ-ferrite into austenite was promoted as the T Ni increased. The shear resistance of the steel/Al joint reached the maximum value of 103 N mm −1 when T Ni was 20 µm. Which was almost 92% higher than the strength of the joint without nickel foil added.

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Section: Introductionmentioning

confidence: 99%

Effect of nickel interlayer thickness on lap joint laser welding for aluminium-steel dissimilar materials

Zhou

et al. 2022

Science and Technology of Welding and Joining

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“…Relatively to solid-state welding, fusion welding has high efficiency and wide adaptability, but tends to form unevenly distributed IMCs at interface due to its severe heat fluctuation [7][8][9]. Xia [10] found IMCs thickness increased by five times from bottom to top.…”

Section: Introductionmentioning

confidence: 99%

Improved mechanical properties of laser-arc hybrid welded Al/steel dissimilar butt-joint through beam oscillation

Meng

Jiang

Cen

et al. 2021

Science and Technology of Welding and Joining

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Al/steel butt-joints are hard to be fusion welded because of the easily formed and unevenly distributed brittle intermetallic compounds (IMCs) at the interface. Laser-arc hybrid welding was used to suppress the IMCs formation and improve its uniformity through beam oscillation. The weld defects of uneven formation and lack of fusion were suppressed at optimised frequency of 150 Hz. Furthermore, the interface was transferred from an uneven two-layer IMCs ( ≥ 3.8 µm), including Al 5 Fe 2 and Al1 3 Fe 4, to a uniform single-layer Al 5 Fe 2 ( ≤ 1.4 µm). Owing to these changes, not only the tensile property was increased by 65% compared to non-oscillating weld, but also the bending property that hardly reported in most studies was enhanced by 96%.

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“…And the key factor to realize active welding is the addition of active elements, such as Ti, Cr, Zr, etc. [7]. However, there are also some shortcomings in active welding, especially welding in high temperature.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and interface reaction in direct active bonding of GaAs to GaAs using Sn–Ag–Ti solder filler

Cheng

Yue

Jiang

et al. 2021

J Mater Sci: Mater Electron

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The element diffusion behavior, the interfacial evolution and mechanical properties of the joining of gallium arsenide (GaAs) with Sn3.5Ag4Ti(Ce,Ga) alloy filler at 250 °C in air were investigated. The interfacial microstructure, elemental diffusion and absorption, interface reaction and evolution were analyzed in detail. Titanium (Ti) and gallium (Ga) element were found to obviously take part in the active bonding between GaAs substrate and Sn3.5Ag4Ti(Ce,Ga) alloy filler. According to the transmission electron microscopy analysis, the titanium elements were observed to successively segregate at the interface, while some of the element Ga included in GaAs to dissolve into the molten alloy. In addition, there is a resultant formed discontiniously along the interface which was identified as Ga 4 Ti 5 , but no arsenic compounds were observed. The joining mechanisms related to the adsorption and reaction were discussed based on the thermodynamics theories, the molecular dynamic (MD) model and the reaction product controlled (RPC) model. The analysis results show that the RPC model was a special form of MD model, both the chemical reaction and the adsorption of active elements may control the reactive wetting of Sn3.5Ag4-Ti(Ce,Ga) filler alloy on GaAs substrate together. In order to better understand the interfacial evolution of bonding, a simple interfacial evolution model between GaAs substrate and Sn3.5Ag4Ti(Ce, Ga) active solder was established. Finally, the effect of holding time on shear strength was investigated and the maximum shear strength of 23.32 MPa was obtained when soldered at 250 °C for 1 h. The interface separation could be caused by the mixed fracture mechanism.

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Effect of Ti foil on microstructure and mechanical properties of laser fusion welding of DP590 dual-phase steel to 6022 aluminum alloy

Cited by 15 publications

References 47 publications

Effect of nickel interlayer thickness on lap joint laser welding for aluminium-steel dissimilar materials

Effect of nickel interlayer thickness on lap joint laser welding for aluminium-steel dissimilar materials

Improved mechanical properties of laser-arc hybrid welded Al/steel dissimilar butt-joint through beam oscillation

Adsorption and interface reaction in direct active bonding of GaAs to GaAs using Sn–Ag–Ti solder filler

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