Mechanical analysis of ultra-thin friction stir welding joined sheets with dissimilar and similar materials

Scialpi, A.; Giorgi, M. De; Filippis, Luigi Alberto Ciro De; Nobile, R.; Panella, F.W.

doi:10.1016/j.matdes.2007.04.006

Cited by 148 publications

(73 citation statements)

References 30 publications

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“…Since the grain in the TMAZ is very refined (Fig. 7a and b), softening in this zone as to be related with the evolution of the strengthening precipitates during welding [13,4,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The grain structure in the HAZ of the S66 weld (Fig.…”

Section: Hardness Test Resultsmentioning

confidence: 99%

“…Until now, FSW industrial application had mostly been restricted to the construction of large components in shipbuilding and aerospace and aeronautics industry [6,7]. The application of this process in the automotive industry is relatively recent and has one of its main fields of interest for the production of aluminium tailored welded blanks (TWB) from very thin sheets [8][9][10][11][12][13]. In fact, some difficulties continue to restrict the application of TWBs in industry [14][15][16][17] such as, the difficulty in welding some materials (Al alloys and HSS), the strength reduction in the weld line and the poor formability of the TWBs.…”

Section: Introductionmentioning

confidence: 99%

“…The thickness reduction resulting from the forging effect of the shoulder can significantly reduce the mechanical resistance in thin plates (1 mm or less). The presence of micro defects, usually acceptable in thick welds, also pose serious problems in thin plate sheet welds [11].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

et al. 2009

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a b s t r a c tThe tensile behaviour of similar and dissimilar friction stir welds in 1 mm thick sheets of two aluminium alloys (AA5182-H111 and AA6016-T4) is analysed in this paper. The heterogeneity in properties across the welds was studied by performing microhardness tests and microstructural analysis. The tensile tests were performed in samples extracted longitudinal and transverse to the weld direction. It was found that the tensile behaviour of the welds depends mainly on the grain size in the TMAZ, for the AA5182-H111 alloy, and on precipitate distribution, for the AA6016-T4 alloy. In all types of welds, the HAZ preserves the same properties of the base materials. The global mechanical behaviour of the AA5182-H111 similar welds is very similar to that of the base material. However, for the AA6016-T4 similar welds and for the AA6016-T4-AA5182-H111 dissimilar welds a 10-20% strength reduction relative to the base materials and important losses in ductility were reported.

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Section: Hardness Test Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

et al. 2009

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“…At the beginning of the 90´s the Welding Institute patented the Friction Stir Welding (FSW), a new and revolutionary joining process, whose development has been driven by its potential for joining materials considered hardly weldable by conventional fusion processes, in similar and dissimilar arrangements [1][2][3][4]. In this process, the welds are produced by plunging a nonconsumable rotating tool, composed by a specially shaped pin and shoulder, into the abutting edges of the sheets to be joined and translating it all along the joint ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Welding of very thin plates

et al. 2012

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“…13) In addition, the FSW has recently gotten a lot of attention also in order to produce tailor-welded blanks (TWBs) composed of dissimilar materials. [14][15][16][17][18][19][20] However, there were not a lot of researches on dissimilar FSW between the aluminum and magnesium alloys. [18][19][20][21][22] Hirano et al 18) have carried out a dissimilar FSW between 1050 aluminum and AZ31 magnesium alloys, and reported that an intermediate layer was formed near their bonded interface, which was composed of an intermetallic compound Al 12 Mg 17 and an undefined compound.…”

Section: Introductionmentioning

confidence: 99%

Dissimilar Friction Stir Welding for Tailor-Welded Blanks of Aluminum and Magnesium Alloys

2009

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In this study, tailor-welded blanks (TWBs) composed of A5052P-O aluminum and AZ31B-O magnesium alloys were produced by the friction stir welding process. The sound surfaces without large defects were successfully obtained at the tool rotation speeds ranging from 1000 to 1400 rpm under the constant tool traverse speed of 300 mm/min, and the surface roughness was decreased in the friction-stir-welded zone (SZ) with the increase in the tool rotation speed. Also for 100, 300 and 500 mm/min, the sound surfaces without large defects were obtained under the constant tool rotation speed of 1400 rpm. The increase of the tool traverse speed led to the decrease in the surface roughness of the SZ. In the SZ, the bonded interface was clearly evident with plastic flow pattern between the aluminum and magnesium alloys, although an onion ring pattern was not formed. During tensile testing, the TWBs were fractured in the SZ at the early stage of the plastic deformation, i.e. strain hardening region, without remarkable area reduction near the fracture region. The TWBs exhibited the similar average tensile strength, showing that there were not noteworthy changes in the tensile strength as a function of the tool rotation speed. The average tensile strength, however, was slightly decreased with the increase in the tool traverse speed. It is noticeable that, in all cases, the joint efficiency of the TWBs exceeded 62%, and the maximum average tensile strength of about 143 MPa was obtained at 1400 rpm under the tool traverse speed of 100 mm/min, which was nearly equivalent to the joint efficiency of about 72%. The average total elongation of the TWBs was about 2% or less considerably lower than those of the base metals, without significant changes as functions of the tool traverse speed and the tool traverse speed.

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Mechanical analysis of ultra-thin friction stir welding joined sheets with dissimilar and similar materials

Cited by 148 publications

References 30 publications

Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

Friction Stir Welding of very thin plates

Dissimilar Friction Stir Welding for Tailor-Welded Blanks of Aluminum and Magnesium Alloys

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