Effect of friction spot welding (FSpW) on the surface corrosion behavior of overlapping AA6181-T4/Ti-6Al-4V joints

Vacchi, G.S.; Plaine, Athos Henrique; Silva, R.; Sordi, Vitor Luiz; Suhuddin, U.F.H.; Alcântara, Nelson Guedes de; Kuri, S.E.; Rovere, Carlos Alberto Della

doi:10.1016/j.matdes.2017.06.005

Cited by 33 publications

(18 citation statements)

References 26 publications

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“…There are little studies about improving corrosion resistance that have been reported for FSW of AA6061 aluminum alloy, moreover, the use of T4 and T6, as pretreatment, were not used as a process for AA6061 aluminum alloys. Some treatments were done but not on the AA6061 aluminum alloy [14][15][16]. The present work aims to study the effect of the FSW process parameters, typically, the tool rotational and welding speeds as well as the post weld heat treatment, typically, T4 and T6 heat treatments on the corrosion behavior of friction stir welded AA6061 joints.…”

Section: Introductionmentioning

confidence: 99%

Effect of Friction Stir Welding Process Parameters and Post-Weld Heat Treatment on the Corrosion Behaviour of Aa6061-O Aluminum Alloys

et al. 2019

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T HE aim of the present work is to study the effect of rotation and welding speeds as well as the T4 and T6 post-weld heat treatments (PWHT) on the corrosion behavior of AA6061-O aluminum plates joined using friction stir welding (FSW). The corrosion properties of welded joints were studied by Potentiodynamic polarization and Immersion tests. The results showed that both T4 and T6 PWHT improves the corrosion resistance of stirred zones compared to base alloy. However, joints of T4 showed lower corrosion resistance compared to T6. Increasing welding speed or reducing rotation speed increased the corrosion resistance of joints.

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Section: Introductionmentioning

confidence: 99%

Effect of Friction Stir Welding Process Parameters and Post-Weld Heat Treatment on the Corrosion Behaviour of Aa6061-O Aluminum Alloys

et al. 2019

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“…The differences limits mutual solubility and formation of brittle intermetallic phases in Al-Ti system, making it hard to venture into fusion welding. [7,8]. The brittle intermetallic compounds (IMCs) such as TiAl 3 , TiAl and Ti 3 Al are often found at the interface of Al-Ti joints, Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, brazing, ultrasonic spot welding, friction stir welding and laser welding were attempted to join dissimilar Al-Ti alloys [1,3,7,8,[11][12][13]. Brazing, ultrasonic spot welding and friction stir welding are restricted to material size and joint configuration.…”

Section: Introductionmentioning

confidence: 99%

Influence of welding parameters on lap joint between Al and Ti alloys using low power fiber laser

Janasekaran

Lemon

Yusof³

2019

Materialwissenschaft Werkst

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Fiber laser beam welding has always been a user‐friendly and flexible method to join dissimilar materials despite differences in thermal coefficient. Many industrial applications such as automotive has replaced the conventional joining methods towards this because of the flexibility and reduction in time consumption. In the present study, dissimilar titanium alloy; Ti6Al4 V and aluminum alloy; AA2024‐0 were laser welded through a lap joint technique using a low power Yb‐fiber laser without any additional filler. The influence of welding speed on weld morphology was investigated using optical microscopy (OM) and scanning electron microscope (SEM). The cross‐section of the joints revealed that the fusion zone (FZ) and heat affected zones (HAZ) are wider when welding speed decreases with lower laser power. This result shows that the low power fiber laser has sufficient energy to melt the base materials, forming a liquid bridge to facilitate the smooth flow of molten metal between the top and bottom layer. Therefore, at lower welding speeds with constant low laser power, it was shown that there are possibilities of laser welding between two non‐ferrous metals.

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Section: Introductionmentioning

confidence: 99%

“…Lightweight hybrid structures have attracted increasing attention in the aerospace and automobile industries to enhance performance efficiency as well as to reduce environmental impact [1][2][3][4]. In this context, the dissimilar joining of aluminum (Al) and titanium (Ti) alloys has been widely used in the manufacturing of lightweight hybrid structures [4][5][6]. However, joining these two alloys is a considerable challenge because of their different physical properties, limited mutual solubility, and formation of brittle intermetallic phases in the Al-Ti alloying system [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Spot Welding-Brazing of Al and Hot-Dip Aluminized Ti Alloy with Zn Interlayer

Zhou

Chen

et al. 2018

Metals

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Friction stir spot welding (FSSW) of Al to Ti alloys has broad applications in the aerospace and automobile industries, while its narrow joining area limits the improvement of mechanical properties of the joint. In the current study, an Al-coating was prepared on Ti6Al4V alloy by hot-dipping prior to joining, then a Zn interlayer was used during friction stir joining of as-coated Ti alloy to the 2014-Al alloy in a lap configuration to introduce a brazing zone out of the stir zone to increase the joining area. The microstructure of the joint was investigated, and the joint strength was compared with the traditional FSSW joint to confirm the advantages of this new process. Because of the increase of the joining area, the maximum fracture load of such joint is 110% higher than that of the traditional FSSW joint under the same welding parameters. The fracture load of these joints depends on the joining width, including the width of solid-state bonding region in stir zone and brazing region out of stir zone.optimize the mechanical properties of the joint [17][18][19][20][21]. Unavoidably, the traditional FSSW would leave a keyhole that reduces its bonding area [22]. Although some modified processes for FSSW, such as refill FSSW [23], flat FSSW [24], and short travel FSSW [25], have attempted to eliminate this visible keyhole, they are complicated and time-consuming owing to the rigorous welding conditions and/or complex tool design. Recently, friction stir brazing (FSSB) has been developed by using a pinless tool and adding brazing filler metal to induce metallurgical reaction at the interface with the aid of friction heat and forging pressure, instead of plastic flow [22]. This technique has successfully introduced a brazing zone in dissimilar joints of steel/Al [26], Cu/Al [27], and Al /Mg [28], while FSSB of Al and Ti alloys is yet to be reported.This work aims to find an effective approach to improve the joining area of the Al/Ti joint by combining FSSW and FSSB. Zinc (Zn) is an optional filler for FSSB of Al alloys as a result of its low melting point (420 • C), high solubility in Al, as well as absence of formation of IMCs in the Al-Zn alloying system [29][30][31][32]. During our preliminary study, a Zn interlayer was placed between the interface of 2014 Al and Ti6Al4V alloys for the FSSB process to determine their weldability. It was found that the high affinity of Ti towards oxygen led to the formation of non-protective oxide scales on the Ti6Al4V [33], resulting in poor wettability of Zn to Ti alloys and, therefore, failure to join Al and Ti alloys. Recently, using an electroplating process before the FSB process would produce a copper layer on the surface of graphite, which converted the graphite-copper lap joint to the similar joining of copper to copper [34]. This gives us an idea that pretreating the base metal will be a possible benefit for FSSB of Al and Ti.In the present paper, we utilized hot dip to aluminize T6Al4V alloys and developed a friction stir spot joining process, called friction stir spot w...

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Effect of friction spot welding (FSpW) on the surface corrosion behavior of overlapping AA6181-T4/Ti-6Al-4V joints

Cited by 33 publications

References 26 publications

Effect of Friction Stir Welding Process Parameters and Post-Weld Heat Treatment on the Corrosion Behaviour of Aa6061-O Aluminum Alloys

Effect of Friction Stir Welding Process Parameters and Post-Weld Heat Treatment on the Corrosion Behaviour of Aa6061-O Aluminum Alloys

Influence of welding parameters on lap joint between Al and Ti alloys using low power fiber laser

Friction Stir Spot Welding-Brazing of Al and Hot-Dip Aluminized Ti Alloy with Zn Interlayer

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