Effects of tool design on the microstructure and mechanical properties of refill friction stir spot welding of dissimilar Al alloys

Shen, Zhikang; Ding, Yifan; Gopkalo, O.; Diak, B.J.; Gerlich, A.P.

doi:10.1016/j.jmatprotec.2017.10.034

Cited by 61 publications

(42 citation statements)

References 13 publications

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“…In order to reduce the sensitivity of mechanical properties of the joint to welding parameters, Shen et al [37] designed a novel tool sleeve with three grooves/notches, as shown in Fig. 14.…”

Section: Welding Toolmentioning

confidence: 99%

See 1 more Smart Citation

Refill Friction Stir Spot Welding of Similar and Dissimilar Alloys: A Review

Feng

Tang

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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Refill friction stir spot welding, also known as friction spot welding (FSpW), is a solid-state welding process suitable for spot joining of lightweight materials. Through the efforts of improving joint quality for similar and dissimilar materials, for example, aluminum and magnesium, this joining technology is well developed. The joining mechanism and process characteristics of FSpW have been widely studied. However, the application of FSpW in industry has not been entirely successful. In this review article, the research of similar and dissimilar material joints, such as, Al/Cu, Al/Ti, Al/Mg and Al/ Steel, is summarized. The microstructural features and mechanical properties of the joints, welding tool and the application development are discussed in detail.

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Section: Welding Toolmentioning

confidence: 99%

“…Fig.14Geometrical feature of the standard sleeve a and the modified sleeve b; typical cross section of the weld fabricated by the modified tool c[37] …”

mentioning

confidence: 99%

Refill Friction Stir Spot Welding of Similar and Dissimilar Alloys: A Review

Feng

Tang

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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“…Many recent experimental research investigations have proved that, the majority of the defects related with the joints (fabricated using traditional & conventional joining techniques) found to be eliminated completely due to the employment of FSW process, especially during joining of Al alloys [30][31][32][33][34][35][36][37][38][39][40][41]. For example, Yufeng Sun et al [31] performed an experimental investigation during joining of 6061 -T6 Al alloys using FSW process and proved that, the formation of fine grains in the stir zone have resulted in the fabrication of joints, which can withstand shear loads to a maximum of 4500 N, which is very much when compared with that of the joints fabricated using conventional welding techniques.…”

Section: Survey Of Literaturementioning

confidence: 99%

“…Apart from this, it was proved by many investigations that FSW process can be successfully applied to fabricate joints for dissimilar Al alloys and can also produce dissimilar Al alloy joints with improved properties. Shen et al [41] successfully fabricated dissimilar Al6022-T4/Al7075-T6 joints using the friction stir spot welding process by employing different designs of tools at similar process parameters. They were able to obtain defect free weldments by employing an FSW tool with 3 grooves in the sleeve of the tool.…”

Section: Survey Of Literaturementioning

confidence: 99%

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Sevvel¹,

Mahadevan²,

Sateš³

et al. 2019

FME Transactions

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An experimental investigation was conducted with the basic objective of demonstrating the feasibility of joining the AZ80A Mg alloys using the technique of friction stir welding (FSW). Good quality joints free from defects were obtained for 5mm thickness AZ80A Mg alloy flat plates at a speed of rotation of 750 rpm with a traversing speed of 1.5 mm/min, by employing a FSW tool fabricated out of M35 grade High Speed Steel(HSS). It was experimetally observed that, the nugget zone (NZ) of the defect free weldments were found with fine sized, equally spaced & uniformly distributed grains when compared with that of the parent metal. Apart from this, the heat affected zone (HAZ) lying beside the NZ was found to possess larger sized near equaxied grains due to the effect of annealing. The weld zones were found to possess regions of slight softening nature when compared to that of the parent metal, arising from the dislocation of the lower densities. Moreover, the tensile strength of the defect free weldments was found to be around 78% of the parent metal, which seems to better than that of the strengths obtained using conventional joining techniques.

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“…Reduced offsetting of probe and optimized rotation of tool resulted in increased strength along with proper intermetallic layer formation at nugget zone. Shen et al [13] studied about the influence of tool profile over the formation of voids in Al6022-T4/Al7075-T6 weld joints developed through refill spot FSW. The present work aims at understanding the influence of FSW process of AA2024 alloy over the mechanical properties and microstructural analysis.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure Analysis of AA2024 Welded Joints by Friction Stir Welding

Rajkumar¹,

Raja²,

Lingadurai³

et al. 2020

JNMES

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Process of joining different components by the application of external heat has resulted in induced stress on metals. Friction stir welding has been developed in order to avoid such residual stress development while joining. In this present work, aluminium alloy AA2024 plates were welded by using Friction stir welding process. The experiments were conducted for different combinations of parameters such as rotational speed, transverse speed and axial load. Welded joints developed were tested for mechanical and microstructure analysis. Mechanical joints developed have a maximum hardness of 147.6 hv in nugget zone and maximum tensile strength of 368.76 N/mm 2. Response surface analysis carried out has revealed that transverse speed and rotational speed has high impact on the hardness and tensile strength respectively. The grains at the nugget zone were very fine and uni-axed improving their tensile strength.

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Effects of tool design on the microstructure and mechanical properties of refill friction stir spot welding of dissimilar Al alloys

Cited by 61 publications

References 13 publications

Refill Friction Stir Spot Welding of Similar and Dissimilar Alloys: A Review

Refill Friction Stir Spot Welding of Similar and Dissimilar Alloys: A Review

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Interfacial Microstructure Analysis of AA2024 Welded Joints by Friction Stir Welding

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