Microstructure and Mechanical Behavior of Friction-Stir-Welded 2017A-T451 Aluminum Alloy

Mimouni, Oussama; Badji, Riad; Kouadri-David, Afia; Gassaa, R.; Chekroun, Nabil; Hadji, Mohamed

doi:10.1007/s12666-019-01663-7

Cited by 10 publications

(7 citation statements)

References 37 publications

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“…From the fitting lines in Fig. 8 and calculated values in Table 3, the BM exhibited the highest Figure 9 compares the fatigue strength and tensile strength of the BT-FSW joints in this study with other 2xxx series Al alloy joints in previous studies [1,[49][50][51][52][53]. In this study, the fatigue life up to 10 7 cycles was specified as the fatigue limit, and some data were derived and calculated according to the previous results in the literature.…”

Section: High-cycle Fatigue Propertiesmentioning

confidence: 80%

Enhanced Fatigue Properties of 2219 Al Alloy Joints via Bobbin Tool Friction Stir Welding

Wang

Zhang

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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In the present study, 2219-T87 Al alloy plates, 4 mm in thickness, were subjected to bobbin tool friction stir welding (BT-FSW) under relatively high welding speeds of 200 and 400 mm/min, with the aim to analyze the effect of welding speeds on fatigue properties of the joints. The results showed that the tension-tension high-cycle fatigue performance of the BT-FSW joints at room temperature was significantly enhanced compared to that of other joints of 2xxx series Al alloys counterparts. Particularly at a high welding speed of 400 mm/min, the fatigue strength of the joint reached 78% of the base material together with a high tensile strength of 311 MPa. It was found that the joint line remnants had no effects on the fatigue properties of the BT-FSW joints due to the elimination of root flaws under the action of the lower shoulder. Most of the samples with the welding speed of 200 mm/min failed at the thermo-mechanical zone (TMAZ) during fatigue tests, attributable to the coarsened grains and precipitates, but all of the samples with high welding speed of 400 mm/min randomly failed at the nugget zone due to the improved hardness value in the TMAZ.

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Section: High-cycle Fatigue Propertiesmentioning

confidence: 80%

Enhanced Fatigue Properties of 2219 Al Alloy Joints via Bobbin Tool Friction Stir Welding

Wang

Zhang

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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“…Hardness measurements acquired from sections of the rods obtained with this method tend to give a saddle-like profile centered on the rod’s long axis. These results are practically wholly dependent on local grain size as in the case of FSW processes [ 14 , 15 ]. This phenomenon could be explained according to the Hall–Petch relationship, i.e., in the same way as in the case of 1050 and 5083 Al alloys [ 16 ].…”

Section: Discussionmentioning

confidence: 99%

Modification of Mechanical Properties of Aluminum Alloy Rods via Friction-Extrusion Method

2020

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The elaboration of a modified friction-extrusion method aimed at obtaining 2017A aluminum rods of gradient microstructure is described. This was achieved by cutting spiral grooves on the face of the stamp used for alloy extrusion. The experiments were carried out at a constant material feed (~10 mm/min) and a range of tool rotation speeds (80 to 315 rpm). The microstructure observations were carried out using light microscopy (LM) and both scanning and transmission electron microscopy (SEM and TEM). The mechanical properties were assessed through hardness measurements and static tensile tests. The performed investigations show that material simultaneous radial and longitudinal flow, enforced by friction of the rotating tool head and extrusion, results in the formation of two zones of very different microstructures. At the perpendicular section, the outer zone stands out from the core due to circumferential elongation of strings of particles, while in the inner zone the particles are arranged in a more uniform way. Simultaneously, the grain size of the outer zone is refined by two to four times as compared with the inner one. The transfer from the outer zone to the core area is of gradient type. The hardness of the outer zone was found to be ~10% to ~20% higher than that of the core.

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“…The size of the tool is equal to the diameter of the shoulder. The thermal and mechanical properties of plate 2017A-T451 are summarized in the Table 1 and Table 2 [16]. Table 1.…”

Section: IImentioning

confidence: 99%

“…Mechanical properties of 2017A plate Table 2. Thermal properties of 2017A While, the mechanical characteristics of the tool used in this process is presented in Table 3 [16]. Table 3.…”

Section: IImentioning

confidence: 99%

“…On the other hand, Cavaliere et al [14] and Colegrove et al [15] studied the effect of the Tool Geometries on Thermal Analysis of the Friction Stir Welding This article aims to investigate and analyze numerically the FSW, including welding processes, temperature distribution and residual stresses. The predicted surface temperature is compared with the experimental work of Mimouni et al [16]. The mesh procedure and the boundary conditions are discussed.…”

Section: Introductionmentioning

confidence: 98%

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Numerical Analysis of Thermal Friction Stir Weld-ing (FSW) Application in Aerospace Industry

Chakroun¹

2019

IJRASET

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In this work, Friction Stir Welding (FSW) of 2017A-T451 aluminum alloy for a constant tool rotational speed 1250 rpm is investigated and analyzed. 3D numerical simulation has been carried out with the aid of ANSY code. In this context, two steps are performed; a mesh system is adapted to the geometry (plaque and tool) in order to use the finite elements. Secondly; the predicted result of plate temperature has been compared to experimental result. The surface temperature of the plate increases with the passage of the rotating tool; this is due to the increasing of friction between the tool and plate. This increase is slow until 300 s then it decreases rapidly. A good agreement is noted between the experimental and predicted results. According to this result, ANSYS provides a satisfactory prediction for the FSW.

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Microstructure and Mechanical Behavior of Friction-Stir-Welded 2017A-T451 Aluminum Alloy

Cited by 10 publications

References 37 publications

Enhanced Fatigue Properties of 2219 Al Alloy Joints via Bobbin Tool Friction Stir Welding

Enhanced Fatigue Properties of 2219 Al Alloy Joints via Bobbin Tool Friction Stir Welding

Modification of Mechanical Properties of Aluminum Alloy Rods via Friction-Extrusion Method

Numerical Analysis of Thermal Friction Stir Weld-ing (FSW) Application in Aerospace Industry

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