Temperature evolution, microstructure and mechanical properties of friction stir welded thick 2219-O aluminum alloy joints

Xu, Weifeng; Liu, Jinhe; Luan, Guohong; Dong, Chunlin

doi:10.1016/j.matdes.2008.09.021

Cited by 186 publications

(45 citation statements)

References 16 publications

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“…This fracture is distinctly different from the microvoid type ductile fracture in the similar metal weld of 6061 Al in Figure 6 (a). It can be observed that the fractured surface was characterized with distribution of dissimilar size dimples [14]. These fine dimples indicate ductile behaviour of the aluminium alloy before the failure occurred.…”

Section: Tablementioning

confidence: 96%

Study of Dissimilar Welding AA6061 Aluminium Alloy and AZ31B Magnesium Alloy with ER5356 Filler Using Friction Stir Welding

Mahamud

Ishak

Aiman

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. This paper is to study of dissimilar welding AA6061 aluminium alloy and AZ31B magnesium alloy with ER5356 filler using friction stir welding. 2 mm thick plates of aluminium and magnesium were used. Friction stir welding operations were performed at different rotation and travel speeds and used the fixed tilt angle which is 3°. The rotation speeds varied from 800 to 1100 rpm, and the travel speed varied from 80 to 100 mm/min. In the range rotation speed of 800 to 1000 rpm and welding speed of 80 to 100 mm/min there are no defect at the weld. Tensile test show the higher tensile strength is 198 MPa and the welding efficiency is about 76%.

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Section: Tablementioning

confidence: 96%

Study of Dissimilar Welding AA6061 Aluminium Alloy and AZ31B Magnesium Alloy with ER5356 Filler Using Friction Stir Welding

Mahamud

Ishak

Aiman

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…They determine whether the welding process will produce a good weld, influencing the residual stresses, the microstructure and the strength of welds. Several studies have measured temperatures in FSW using thermocouples [8][9][10], but only a few have been involved in experimental analysis using thermography [9] and still less on laser-assisted friction stir welding. Employing thermocouples, Xu et al [8] showed that the temperature decreases with decreasing the transverse speed and increases with increasing the rotational speed.…”

Section: Temperature Field In Fsw and Laser-assisted Fsw Processesmentioning

confidence: 99%

Residual Stress in Friction Stir Welding and Laser-Assisted Friction Stir Welding by Numerical Simulation and Experiments

Casavola¹,

Cazzato²,

Moramarco³

2018

Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments

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The friction stir welding (FSW) has become an important welding technique to join materials that are difficult to weld by traditional fusion welding technology. In this technique, the material is not led to fusion, and the joint is the result of the rotation and movement along the welding line of the tool that causes softening of material due to frictional heat and the stirring of the same. In FSW, the temperature does not reach the fusion value of the materials, and this helps to decrease the residual stress values. However, due to the higher force involved in the weld and, thus, the rigid clamping used, the residual stresses are not low in general in this technique. As the presence of high residual stress values influences the post-weld mechanical properties, e.g. fatigue properties, it is important to investigate the residual stress distribution in the FSW welds. In this chapter, two numerical models that predict temperatures and residual stresses in friction stir welding and laser-assisted friction stir welding will be described. Experimental measurements of temperatures and residual stress will be carried out to validate the prediction of the models.

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“…But in FSW process, there is no melting of aluminium alloy and thus very small chance for HAZ to be widened and this results in improved welded joint strength. The maximum temperature range for the HAZ is up to 400˚C for friction stir welding of aluminium alloy (Xu et al, 2009;Colegrove et al, 2013). From scanning electron micrographs of grains, it is revealed that the second phase particles are distributed at lower tool rotational speed of 500 rpm and the higher traverse speed of the tool shoulder with respect to workpiece.…”

Section: Microstructurementioning

confidence: 99%

Friction stir welding process: An investigation of microstructure and mechanical properties of Al Alloy AlMg4.5Mn joint

Kundu¹,

Singh²

2017

10.5267/j.esm

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Aluminium alloy AlMg4.5Mn has got comprehensive acceptance in the manufacturing of light weight frames, marine structures which require high strength and worthy corrosion revulsion. The present investigation work focuses on friction stir welding process in which influences of operating parameters have been studied on friction stir welded butt joints. The FSWed joints specimens have been produced by experimentation at three levels of tool traverse speed and tool rotational speed keeping input force and tool tilt angle constant. Mechanical properties and microstructure of welded joints have been investigated in the present study. Change in the microstructure at different zones which transforms the mechanical properties of welded joints was due to the asymmetrical flow of material and thermal cycles around the pin. The second phase beta grains are formed as the very high temperature reached due to input parameters combinations. Traverse speed (TS) and tool rotational speed (TRS) are taken in a range of 16-40 mm/min and 500-1400 rpm, respectively. The best combination of parameters results in higher tensile strength which is well supported by the micro-hardness curve and the compact grains microstructure profile. Microstructure at different points and physical properties exhibited by the welded joint are well brought into line to summarize the effects of different parameters.

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Temperature evolution, microstructure and mechanical properties of friction stir welded thick 2219-O aluminum alloy joints

Cited by 186 publications

References 16 publications

Study of Dissimilar Welding AA6061 Aluminium Alloy and AZ31B Magnesium Alloy with ER5356 Filler Using Friction Stir Welding

Study of Dissimilar Welding AA6061 Aluminium Alloy and AZ31B Magnesium Alloy with ER5356 Filler Using Friction Stir Welding

Residual Stress in Friction Stir Welding and Laser-Assisted Friction Stir Welding by Numerical Simulation and Experiments

Friction stir welding process: An investigation of microstructure and mechanical properties of Al Alloy AlMg4.5Mn joint

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