Impact of pinless stirring tools with different shoulder profile designs on friction stir spot welded joints

Atak, Ahmet

doi:10.1007/s12206-020-0825-9

Cited by 10 publications

(3 citation statements)

References 15 publications

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“…Tozaki et al [37] developed a newly stirring tool without a probe for the FSSW; the process mainly relies on rolling grooves on the shoulder surface for stir friction welding of the sheets. Atak [38] developed pinless stirring tools with different shoulder profile designs (A, scrolled; B, knurled; C, ridged; D, grooved; E, concentric circles) to explore the Fig. 3 The schematic of the UAFSSW [31] Fig.…”

Section: Friction Stir Spot Weldingmentioning

confidence: 99%

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Review on joining processes of magnesium alloy sheets

Han

Wang

et al. 2021

Int J Adv Manuf Technol

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Magnesium alloy sheets have an increasing proportion of applications in automobiles due to their high specific strength. The usability of traditional welding processes and mechanical joining processes is restricted by the characteristic of magnesium alloy sheets. In order to improve the plasticity of magnesium alloy sheets and realize the reliable joining of magnesium alloy sheets with dissimilar sheets, researchers have conducted a lot of research. In this paper, the existing joining processes of friction stir spot welding, friction stir blind riveting, hybrid self-piercing riveting, and friction self-piercing riveting for magnesium alloy sheets are reviewed; the latest advances of joining process are introduced; and the principle, development, advantages, and shortcomings of each process for improving the plasticity of magnesium alloy sheets are systematically described. Several unaddressed issues in the joining of magnesium alloy sheets are identified. The hybrid of mechanical and solid-state joining processes will be a trend in future development.

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Section: Friction Stir Spot Weldingmentioning

confidence: 99%

“…The 3-mm-thick AZ31B magnesium alloy sheet and 1mm-thick DP600 steel sheet were selected by Zhang et al [45,46] to investigate the effects of the feed rate and lap mode Fig. 5 Different shoulder profile designs for the pinless stirring tools [38] Fig. 6 Flat DSAT FSSW process [41] on the strength of the joint.…”

Section: Friction Stir Blind Rivetingmentioning

confidence: 99%

Review on joining processes of magnesium alloy sheets

Han

Wang

et al. 2021

Int J Adv Manuf Technol

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show abstract

“…They pointed out that the grooves mainly affect the material ow and have little in uence on heat generation. Ahmet [26] compared the mechanical properties of AZ31B joints with "scrolled", "knurled", "ridged", "grooved" and "concentric" shoulders at the same welding parameters. The results show that the "ridged" tool obtained the optimal tensile shear and bending performances.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Performances Analyses on Probeless Friction Stir Spot Welds of AA6061-T6 Aluminum Sheets

Chen

Zitao

et al. 2021

Preprint

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Probeless friction stir spot welding (PFSSW) is a variation of conventional friction stir spot welding (CFSSW), which solves the keyhole defect in CFSSW welds. In this work, four types of probeless tools were designed based on helix and spiral feature: small curvature helix (involute tool, IT), large curvature helix (archimedes tool, AT), spiral line (scroll tool, ST) and no feature (flat tool, FT). AA6061-T6 sheets with a thickness of 1.5 mm were welded using the designed probeless welding tools. The effect of tool shapes on the microstructure and mechanical properties of friction stir spot welded AA 6061-T6 aluminum alloy sheets was investigated using different rotational speeds, plunging depths and dwell times. The Taguchi method was utilized to obtain the optimal welding parameter combination for the four tools. And, the tensile-shear mechanical properties of FSSW specimens were characterized under the optimal parameters. The results show that a basin-shaped profile appeared in the weld metallography using the groove tools. The tensile shear failure load (TSFL) of IT (~6.97 kN) was higher than that of ST (~6.49 kN), AT (~6.19 kN) and FT (~5.67 kN), sequentially. Three different fracture modes, interfacial fracture, plug fracture and mixed-mode fracture were observed in the tensile-shear tests of weld specimens.

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Effect of tool groove features on the microstructure and tensile-shear mechanical performances of probeless friction stir spot welds

Chen

Zitao

et al. 2022

Int J Adv Manuf Technol

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Impact of pinless stirring tools with different shoulder profile designs on friction stir spot welded joints

Cited by 10 publications

References 15 publications

Review on joining processes of magnesium alloy sheets

Review on joining processes of magnesium alloy sheets

Microstructure and Mechanical Performances Analyses on Probeless Friction Stir Spot Welds of AA6061-T6 Aluminum Sheets

Effect of tool groove features on the microstructure and tensile-shear mechanical performances of probeless friction stir spot welds

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