TIG welding-brazing of Ti6Al4V and Al5052 in overlap configuration with assistance of zinc foil

Wang, Haodong; Yuan, Xinjian; Li, Ting; Wu, Kanglong; Sun, Yongqiang; Xu, Chuan

doi:10.1016/j.jmatprotec.2017.08.015

Cited by 35 publications

(12 citation statements)

References 24 publications

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“…Considering the lack of heat input (with current of 70A), the TIG arc heat could only melt part of the parent metal and had no ability to heat the molten pool metal to a sufficiently high temperature, thus hindering the full diffusion of Zn. Similar experiment results were reported by Wang et al [28]. As the current increased to 80A, greater heat input promoted the diffusion of Zn and reduced the amount of residual Zn, as depicted in figure 5(b).…”

Section: Microstructure Of Fusion Area Of Al/ti Jointsupporting

confidence: 89%

“…However, the micro hardness value of fusion area dramatically decreased to about 95HV because of general grain coarsening. Similar trends in hardness value were reported by Wang et al [28]. Figure 10(b) indicates that, as the welding current increased to 100A, the evolution of hardness values of brazing zone was consistent with that of the joint obtained under current of 90A.…”

Section: Microstructure Of Fusion Area Of Al/ti Jointsupporting

confidence: 87%

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Mechanical properties and microstructure analysis of welding-brazing of Al/ti butt joint with Zn foil additive

Cheng

2020

Mater. Res. Express

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TIG welding-brazing features of 5052 Al alloy and Ti6Al4V alloy in butt configuration with Zn foil additive were studied with varying welding heat input. The joint morphology, mechanical performance, microstructure and joining mechanism were investigated in terms of experiment observation and analysis. Results reveal that the TIG welding-brazing process was successfully developed to join 5052 Al alloy and Ti6Al4V alloy. With low heat input, a mass of residual Zn and a thin TiAl 3 IMCs layer occurred in the fusion area and brazing area respectively. And with optimal heat input, both the homogeneous diffusion of Zn atoms and the formation of clubbed interfacial reaction layer were beneficial to enhance joint performance. The optimized Al/Ti joint with the maximum joining strength of 192MPa was obtained under the current of 90A. Fracture occurred in the weld seam zone adjacent to the interface of Al/Ti and the fracture morphology was characterized by typical dimples and tearing ridges.

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Section: Microstructure Of Fusion Area Of Al/ti Jointsupporting

confidence: 89%

Section: Microstructure Of Fusion Area Of Al/ti Jointsupporting

confidence: 87%

Mechanical properties and microstructure analysis of welding-brazing of Al/ti butt joint with Zn foil additive

Cheng

2020

Mater. Res. Express

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“…The solidus temperature of Al alloy (923K) induced considerable temperature difference between the solidification and working temperature of Al-Zn alloy. As reported by Wang et al [27], the above temperature variation is equivalent to improve the wetting temperature and strengthen the spread ability of molten metal.…”

Section: Discussionmentioning

confidence: 70%

“…The literatures reveal that welding-brazing technology is beneficial to achieve reliable joining between heterogeneous metals with considerable physical and chemical properties. However, Wang et al [27] reported that during the welding-brazing of Al-Ti, liquid Al alloy molten metal was easy to oxidize and showed inferior wetting and spreading properties on the surface of Ti alloy base metal, which resulted in poor weld appearance and low welding strength. Eventually, in the present study, a Zn interlayer was used to assure fine spreading ability and weld performance.…”

Section: Introductionmentioning

confidence: 99%

The effect of Zn interlayer on microstructure and mechanical performance during TIG overlap welding-brazing of Al to Ti

Cao

et al. 2020

Mater. Res. Express

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Tungsten inert gas welding-brazing technology was investigated to achieve the sound joining of Al-Ti alloys with the addition of Zn interlayer. Experiment results show that the Zn interlayer was beneficial to enhance the wettability of weld metal on Ti alloy substrate and improve the weld appearance. With low heat input, a Zn rich layer was observed near the brazing zone. As the heat input increased, TiAl 3 phase was generated in fusion area and the morphology of interfacial brazing layer changed from lamellar to serrate. With the welding current increased to 85A, the micro hardness of fusion area increased and presented a great fluctuation owing to the excessive formation of TiAl 3 phase. Under the optimal welding current of 75A, the sound Al-Ti weldment with the maximum tensile strength of 175MPa was obtained. Eventually, the improvement mechanism of wettability was investigated.

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“…Guo et al [26] investigated the effect of a TC4 remelting process on the tensile strength of welded joints, and found that, due to the solute redistribution process, the tensile strength increased from 142 to 165 MPa. Wang et al [27] studied the effect of Zn foil addition on the formation of IMCs and the mechanical properties of joints for the welding of Ti6Al4V and Al5052 via TIG welding. It can be inferred from the earlier studies that the growth of IMCs can be significantly regulated by optimizing the composition and heat source distribution.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Beam Oscillation on Laser Welding–Brazing of Ti/Al Dissimilar Metals

et al. 2019

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Ti4Al6V and 6061 Al dissimilar metals were butt welded by the laser oscillating welding method. The effects of laser offset, oscillation frequency, and energy distribution on the formation, microstructure, and tensile properties of dissimilar metal joints are discussed in detail. The experimental results show that the Ti6Al4V was micro melted with a laser offset of 1.1 mm, and a large number of intermetallic compounds (IMCs) were formed on the side of the Ti6Al4V. Additionally, there were some porosity defects in the fusion zone (FZ) due to an inappropriate laser oscillation frequency. When the laser offset was increased to 1.2 mm, the IMC distribution was uniform and the thickness was controlled below 2 μm. The porosity defects in the FZ decreased and the tensile strength of the joints increased significantly. The maximum value of tensile strength reached 173 MPa at a laser frequency of 28 Hz.

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TIG welding-brazing of Ti6Al4V and Al5052 in overlap configuration with assistance of zinc foil

Cited by 35 publications

References 24 publications

Mechanical properties and microstructure analysis of welding-brazing of Al/ti butt joint with Zn foil additive

Mechanical properties and microstructure analysis of welding-brazing of Al/ti butt joint with Zn foil additive

The effect of Zn interlayer on microstructure and mechanical performance during TIG overlap welding-brazing of Al to Ti

Effect of Laser Beam Oscillation on Laser Welding–Brazing of Ti/Al Dissimilar Metals

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