The influence of refill FSSW parameters on the microstructure and shear strength of 5042 aluminium welds

Tier, Marco Antônio Durlo; Rosendo, Tonilson de Souza; Santos, Jorge F. dos; Huber, N.; Mazzaferro, José Antônio Esmerio; Mazzaferro, Cíntia Cristiane Petry; Strohaecker, Telmo Roberto

doi:10.1016/j.jmatprotec.2012.12.009

Cited by 135 publications

(93 citation statements)

References 14 publications

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“…Since its invention, refill FSSW has been used for joining similar metals or materials [6][7][8][9][10] as well as joining dissimilar materials. [11][12][13][14] HZG proved that refill FSSW creates joints with superior mechanical properties to similar processes.…”

mentioning

confidence: 99%

Texture Development and Material Flow Behavior During Refill Friction Stir Spot Welding of AlMgSc

Shen¹,

Lage

Suhuddin³

et al. 2017

Metall Mater Trans A

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The microstructural evolution during refill friction stir spot welding of an AlMgSc alloy was studied. The primary texture that developed in all regions, with the exception of the weld center, was determined to be h110i fibers and interpreted as a simple shear texture with the h110i direction aligned with the shear direction. The material flow is mainly driven by two components: the simple shear acting on the horizontal plane causing an inward-directed spiral flow and the extrusion acting on the vertical plane causing an upward-directed or downward-directed flow. Under such a complex material flow, the weld center, which is subjected to minimal local strain, is the least recrystallized. In addition to the geometric effects of strain and grain subdivision, thermally activated high-angle grain boundary migration, particularly continuous dynamic recrystallization, drives the formation of refined grains in the stirred zone.

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mentioning

confidence: 99%

Texture Development and Material Flow Behavior During Refill Friction Stir Spot Welding of AlMgSc

Shen¹,

Lage

Suhuddin³

et al. 2017

Metall Mater Trans A

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“…Furthermore, Tier et al 19 concluded that the time of the process is relevant to heat input which is associated, in the present case, with welding speed. Rodrigues et al 20 showed that energy increases almost linearly in relation to ω/ν.…”

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confidence: 65%

Effect of Heat Input on the Mechanical Behaviour of Al-Cu FSW Lap Joints

et al. 2018

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Dissimilar Al-Cu joints are desirable due to the combination of the good electrical and thermal properties of copper with the economic advantages of aluminium. However, different chemical, mechanical and thermal properties turn dissimilar welding into a challenge with traditional fusion welding techniques. Friction stir welding appears to be a good alternative to welding dissimilar materials. Most of the works in Al-Cu FSW have been performed with Al on top. This work investigates the influence of heat input on the shear strength of aluminium-copper lap joints produced by FSW with a copper over aluminium lap configuration. Welds produced with the ω/ν rate of 200 rev.mm -1 or 500 rev.mm -1 resulted in the melting of the base materials and material leaking. Joints with shear tensile strength varying from 76 to 85% of the original resistance of AA6060 T5 were produced when the ω/ν rate was varied from 80 to 110 rev.mm -1 . The fracture was governed by tension overload on the aluminium sheet, resulting in little influence of welding defects, such as tunnelling, on the joint strength.

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“…The SZ is characterized by fine grain structure due to dynamic recrystallization [4,9,16,21]. This region underwent severe plastic deformation due to the sleeve and pin movement and was exposed to high temperature, as illustrated in Figure 6c.…”

Section: Microstructure Evaluationmentioning

confidence: 99%

“…Refill FSSW uses a non-consumable tool consisting of a stationary clamping ring, rotating pin and sleeve [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The sleeve-plunge process variant is presented in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…Compared to conventional fusion welding processes, refill FSSW consumes less energy and produces joints with a good surface finish [4,5]. Some published works [5][6][7][8][9][10][11][12][13][14][15] have reported that refill FSSW has been successfully used to weld relatively thin materials, up to 2-mm-thick, in similar and dissimilar joint combinations with good mechanical properties. In similar joint configuration, the weld strength of the joint is driven by a geometrical feature, denominated hook, and the extension of the welded area [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Process optimization and microstructure analysis in refill friction stir spot welding of 3-mm-thick Al-Mg-Si aluminum alloy

Santana

Suhuddin

Ölscher

et al. 2017

Int J Adv Manuf Technol

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Novel ultra-high-strength aluminum alloys provide enormous lightweighting potential for modern car body design. However, joining such alloys can be challenging. Refill friction stir spot welding is a solid state joining process that provides fundamental advantages compared to conventional joining technologies when welding aluminum alloys. This work presents refill friction stirspot welding for joining3-mm-thick Al-Mg-Si alloys. The welded joints have been optimized for shear load condition by the design of experiment and analysis of variance. The results show that it is possible to obtain welds of relatively thick Al-Mg-Si alloys with good mechanical properties. Microstructure analyses show that rotational speed and plunge depth play important rolesin the bonded width and hook height, which affect the mechanical performance of the joint. KeywordsRefill friction stir spot welding; Aluminum alloy; Design of experiments; Response surface methodology; hook; shear layer Highlights • Refill friction stir spot welding of 3-mm-thick Al-Mg-Si alloy single-lap joints was demonstrated • The influence of joining parameters on joint mechanical performance was determined.• A mathematical model for estimating lap shear strength was successfully established.

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The influence of refill FSSW parameters on the microstructure and shear strength of 5042 aluminium welds

Cited by 135 publications

References 14 publications

Texture Development and Material Flow Behavior During Refill Friction Stir Spot Welding of AlMgSc

Texture Development and Material Flow Behavior During Refill Friction Stir Spot Welding of AlMgSc

Effect of Heat Input on the Mechanical Behaviour of Al-Cu FSW Lap Joints

Process optimization and microstructure analysis in refill friction stir spot welding of 3-mm-thick Al-Mg-Si aluminum alloy

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