Post-weld formability of friction stir welded Al alloy 5052

Sato, Yutaka; Sugiura, Yoshitsugu; Shoji, Yohei; Park, Seung Hwan C.; Kokawa, Hiroyuki; Ikeda, Keisuke

doi:10.1016/j.msea.2003.11.035

Cited by 92 publications

(50 citation statements)

References 28 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%

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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%

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

et al. 2009

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“…2,3) Al-Mg alloys, which are classified as non-heat treatable, have a great potential for microstructural evolution by deformation processing and thus possess better mechanical properties. 4,5) Our previous studies 6,7) have shown that frictional stirred specimens showed a considerable improvement in tensile deformation ductility, although the proof stress value increased only slightly.…”

Section: Introductionmentioning

confidence: 92%

Effect of Dynamically Recrystallized Grain Size on the Tensile Properties and Vibration Fracture Resistance of Friction Stirred 5052 Alloy

2006

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5052H34 Al-Mg plates were annealed and then friction stir processed at various rotation speeds ranging from 500 to 1500 rpm to investigate the tensile properties and vibration fracture resistance. The experimental results indicate that grain refinement could be observed at the stir zone with an average grain size varying from 5-16 mm. Based on the observed microstructure and tensile deformation resistance data, the k y slope value of the Hall-Petch equation can be determined. A refined grain size in the stir zone is a common feature of the friction stirred specimens. Different rotation speeds have different corresponding grain sizes and this can be attributed to dynamic recrystallization during friction stir processing (FSP). The effect of grain size on vibration fracture resistance in the stir zone was also examined. Results show that the vibration fracture resistance of the stir zone decreases with increasing the rotation speed. An increase in grain size due to higher rotation speed is detrimental to the vibration propagation resistance, and a small variation in grain size can result in significant changes in the duration of stage I of the D-N curves. The inward crack propagation behavior was found to be the main controlling factor on vibration fracture resistance. This result agrees with the variation in crack propagation rate.

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“…FSW may be used to bond aluminum, copper, and titanium alloys as well as the steel plates [1][2][3][4][5][6][7][8][9][10]. During the welding process, FSW does not require protective gas for shielding or electrodes to create an arc.…”

Section: Introductionmentioning

confidence: 99%

Optimizations of friction stir welding of aluminum alloy by using genetically optimized neural network

Tansel

Demetgül

Okuyucu

et al. 2009

Int J Adv Manuf Technol

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Genetically optimized neural network systems (GONNS) was developed to simulate the intelligent decision-making capability of human beings. After they are trained with experimental data or observations, GONNS use one or more artificial neural networks (ANN) to represent complex systems. The optimization is performed by one or more genetic algorithms (GA). In this study, the GONNS was used to estimate the optimal operating condition of the friction stir welding (FSW) process. Five separate ANNs represented the relationship between two identical input parameters and each one of the considered characteristics of the welding zone. GA searched for the optimized parameters to make one of the parameters maximum or minimum, while the other four are kept within the desired range. The GONNS was found as an excellent optimization tool for FSW.

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Post-weld formability of friction stir welded Al alloy 5052

Cited by 92 publications

References 28 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

Effect of Dynamically Recrystallized Grain Size on the Tensile Properties and Vibration Fracture Resistance of Friction Stirred 5052 Alloy

Optimizations of friction stir welding of aluminum alloy by using genetically optimized neural network

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