Mechanical and microstructural investigation of friction spot welded AA6181-T4 aluminium alloy

Rosendo, Tonilson de Souza; Parra, Bruno Serafim; Tier, Marco Antônio Durlo; Silva, A.A.M. da; Santos, Jorge F. dos; Strohaecker, Telmo Roberto; Alcântara, Nelson Guedes de

doi:10.1016/j.matdes.2010.11.017

Cited by 180 publications

(125 citation statements)

References 16 publications

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“…Because there are no parallel interaction lines in the interaction plot of RSxPD and RSxRR, these interactions are considered to affect the mechanical performance of the joint. The effects of the welding parameters and their interaction on the mechanical performance of the joint are in agreement with some previous studies on the refill FSSW of Al alloys [6][7][8]15]. Figure 3 -Effects of the interactions between RS (rotational speed), PD (plunge depth) and RR (retracting rate) on the mean LSS…”

Section: Design Of Experiments and Analysis Of Variancesupporting

confidence: 90%

“…In contrast, the weld with lower RS has a finer grain in the TMAZ, most likely due to dynamic recrystallization during the process. It is well known that the tip of the hook acts as a stress concentrator, in which failure initiates [6,16]. Therefore, the weld with larger effective thickness and fine grains beyond the hook tip has better mechanical properties than the weld with lower effective thickness and elongated grains.…”

Section: Bmentioning

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%

“…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]. The hook is defined as a partially bonded region and is a transition from the unbonded interface separating the overlapped plates to the fully metallurgically bonded region.…”

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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Section: Design Of Experiments and Analysis Of Variancesupporting

confidence: 90%

Section: Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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show abstract

“…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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Microstructure in Dissimilar Friction Spot Weld of Al to Mg Alloys Observed by Stop‐Action Technique

Suhuddin¹,

Fischer²,

Santos³

2013

Friction Stir Welding and Processing VII

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Mechanical and microstructural investigation of friction spot welded AA6181-T4 aluminium alloy

Cited by 180 publications

References 16 publications

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

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

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

Microstructure in Dissimilar Friction Spot Weld of Al to Mg Alloys Observed by Stop‐Action Technique

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