Fracture toughness of base and weld metal of aluminum alloy EN AW 7049A T652 FSW joint

Perović, Milenko; Vuherer, Tomaž; Bajić, Darko; Geric, K.; Baloš, Sebastian; Rakin, Marko

doi:10.5937/zzk1804159p

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Perović in [ 24 ] gives the results of fracture toughness of the FSW joint, with higher values on the retreating side in accordance with the results of this research. Similar fracture toughness results for joint and base metal of FSWed AA2024-T351 were obtained by Moghadam and Farhangdoost [ 35 ] for the initial crack in the lump zone and the orientation of the cracks along the welding direction.…”

Section: Resultssupporting

confidence: 85%

“…In the paper [ 23 ], Khodir et al provide research on the influence of tool rotation speed (400, 600, 800, 1000, 1250, and 1500 rpm), at a constant welding speed of 50 mm/min on the microstructure, hardness distribution and tensile properties of FSW butt-welded plates with a thickness of 3-mm alloy AA2024-T3. In the paper [ 24 ], Perović et al give the influence of welding speed on the mechanical properties of the welded joint achieved by FSW of Al–Zn–Mg–Cu alloy (EN AW 7049). Tests of the influence of welding parameters (constant tool rotation speed and different welding speed) on tensile properties, hardness profile, impact toughness and fracture mechanics parameters were performed.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Welding Speed on Fracture Toughness of Friction Stir Welded AA2024-T351 Joints

Milčić

Vuherer

et al. 2021

Materials

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In order to ensure a quality welded joint, and thus safe operation and high reliability of the welded part or structure achieved by friction stir welding, it is necessary to select the optimal welding parameters. The parameters of friction stir welding significantly affect the structure of the welded joint, and thus the mechanical properties of the welded joint. Investigation of the influence of friction stir welding parameters was performed on 6-mm thick plates of aluminum alloy AA2024 T351. The quality of the welded joint is predominantly influenced by the tool rotation speed n and the welding speed v. In this research, constant tool rotation speed was adopted n = 750 rpm, and the welding speed was varied (v = 73, 116 and 150 mm/min). By the visual method and radiographic examination, imperfections of the face and roots of the welded specimens were not found. This paper presents the performed experimental tests of the macro and microstructure of welded joints, followed by tests of micro hardness and fracture behavior of Friction Stir Welded AA2024-T351 joints. It can be concluded that the welding speed of v = 116 mm/min is favorable with regard to the fracture behavior of the analysed FSW-joint.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Influence of Welding Speed on Fracture Toughness of Friction Stir Welded AA2024-T351 Joints

Milčić

Vuherer

et al. 2021

Materials

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“…This was higher than for the BM and Specimen 1, where it was roughly 1/4. The latter was similar to the relatively brittle AA7049 alloy that was using an instrumented Charpy pendulum impact tester, reported in the work of Perovic et al [37]. The greatest benefit of BTFSW pertained to impact energy, which was considerably higher than tensile performance.…”

Section: Impact Energy Testing Resultssupporting

confidence: 78%

Influence of Tool–Base Metal Interference on the Performance of an Aluminium–Magnesium Alloy Joined via Bobbin Tool Friction Stir Welding

Baloš

Zlatanović

Kulundzic

et al. 2023

Metals

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Bobbin tool friction stir welding (BTFSW) is a variant of the FSW process which uses the special two-shoulder tool that forms the top and bottom of a weld surface. As such, a significant simplification of the welding setup is achieved. One of the dominant parameters of the BTFSW process is the interference between the tool shoulder pinch gap and the weld metal thickness. In this research, the influence of interference of the square pin tool with convex shoulders on process temperature, microstructure, tensile, impact, and bend performance were studied, and appropriate correlations were devised. The base metal was an aluminum–magnesium alloy in which the interference varied in the range of 0.1 to 0.5 mm. Wormhole defects and irregularities were found in all specimens except in the specimen welded with 0.4 mm interference. An optimal interference of 0.4 mm resulted in the best mechanical properties, which, in terms of tensile strength and reduction of area, were similar to the base metal. Furthermore, the impact strength was significantly higher, which was attributed to the grain refinement effect in the nugget zone.

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Influence of Tool-base Metal Interference on the Performance of Aluminum-Magnesium Alloy Joined by Bobbin Tool Friction Stir Welding

Baloš¹,

Zlatanović²,

Kulundzic³

et al. 2023

Preprint

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Bobbin Tool Friction Stir Welding (BTFSW) is a variant of FSW process using the special two shoulder tool that forms the top and bottom weld surface. As such, a significant simplification of welding setup is achieved. One of the dominant parameters of BTFSW process is the interference between tool shoulder pinch gap and weld metal thickness. In this research, the influence of interference of the square pin tool with convex shoulders on process temperature, microstructure, tensile, impact and bend performance were studied, and appropriate correlations were devised. The base metal was aluminum-magnesium alloy, with the interference varied in the range of 0.1 to 0.5 mm. The worm defects and irregularities were found in all specimens except in specimen welded with 0.4 mm interference. Optimal interference of 0.4 mm resulted in the highest mechanical properties, which, in terms of tensile strength and reduction of area were similar to the base metal. Furthermore, impact strength was significantly higher, which was attributed to grain refinement effect in the nugget zone.

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Fracture toughness of base and weld metal of aluminum alloy EN AW 7049A T652 FSW joint

Cited by 3 publications

References 5 publications

Influence of Welding Speed on Fracture Toughness of Friction Stir Welded AA2024-T351 Joints

Influence of Welding Speed on Fracture Toughness of Friction Stir Welded AA2024-T351 Joints

Influence of Tool–Base Metal Interference on the Performance of an Aluminium–Magnesium Alloy Joined via Bobbin Tool Friction Stir Welding

Influence of Tool-base Metal Interference on the Performance of Aluminum-Magnesium Alloy Joined by Bobbin Tool Friction Stir Welding

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