Interface behaviours and mechanical properties of filling friction stir weld joining AA 2219

Huang, Yongxian; Han, Bing; Lv, Shixiong; Feng, Jicai; Liu, H J; Leng, Jinsong; Li, Y

doi:10.1179/1362171811y.0000000100

Cited by 49 publications

(20 citation statements)

References 19 publications

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“…Since its entry in 1991 the process has continuously evolved thanks to successful parameter optimization and new tool design. Also modified versions of the process exist, as selfreacting friction stir welding (SR-FSW) [7] and filling friction stir welding (FFSW) [8,9], aiming to increase the initial bond strength in different regions of the weld. The comprehensive research and technical development of the FSW process have brought it to the leading edge of aluminum welding technology [10,11].…”

Section: Introductionmentioning

confidence: 99%

Exploring the hybrid metal extrusion and bonding process for butt welding of Al–Mg–Si alloys

Sandnes

Grong

Torgersen

et al. 2018

Int J Adv Manuf Technol

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The hybrid metal extrusion and bonding (HYB) process is a new solid-state joining technique developed for aluminum alloys. By the use of filler material addition and plastic deformation sound joints can be produced at operating temperatures below 400°C. The HYB process has the potential to compete with commonplace welding technologies, but its comparative advantages have not yet been fully explored. Here, we present for the first time the results from an exploratory investigation of the mechanical integrity of a 4-mm AA6082-T6 HYB joint, covering both hardness, tensile and Charpy V-notch testing. The joint is found to be free from defects like pores, internal cavities and kissing bonds, yet a soft heat-affected zone (HAZ) is still present. The joint yield strength is 54% of that of the base material, while the corresponding joint efficiency is 66%. The indications are that the HYB process may compete or even outperform conventional welding techniques for aluminum in the future after it has been fully developed and optimized.

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Section: Introductionmentioning

confidence: 99%

Exploring the hybrid metal extrusion and bonding process for butt welding of Al–Mg–Si alloys

Sandnes

Grong

Torgersen

et al. 2018

Int J Adv Manuf Technol

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“…TWI [ 14 ] and the NASA Marshall Space Flight Center [ 15 , 16 ] first used friction plug welding to repair the keyhole defect. Huang et al [ 17 , 18 ] proposed filling friction stir welding to repair the keyhole defect left at the end of the FSW seam. Zhou et al [ 19 ] developed self-refilling friction stir welding to seal the keyhole left by FSW in stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Weld Quality in Vortex- Friction Stir Welding of 6061-T6 Aluminum Alloy

Liu

Zhen

et al. 2023

Materials

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Vortex-friction stir welding (VFSW) utilizes a stir bar made of an identical material to the workpiece to rub the workpiece’s top surface, which avoids the keyhole defect in conventional friction stir welding. It presents great potential in the repair field of aluminum alloys. In this study, the effect of stir bar diameter, rotation speed, and welding speed on the weld formation was investigated in the VFSW of 6061-T6 aluminum alloy. The weld macrostructure, penetration, and mechanical properties were characterized. The results show that a large diameter of the stir bar can enhance the vortex material flow, increase the heat input, and eliminate the incomplete-penetration defect. The increase in rotation speed within limits can enhance the weld penetration and the mechanical properties of the weld nugget zone (WNZ). However, too high a rotation speed reduces the weld penetration and weakens the mechanical properties of the WNZ. The increase in welding speed reduces the weld penetration but enhances the mechanical properties of the heat affected zone. The incomplete-penetration defect significantly weakens the ductility of the VFSW joint. It can be eliminated by enlarging the stir bar diameter and choosing a moderate rotation speed and a lower welding speed.

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“…FSW is a solid-state welding process which made stronger welded joints of aluminum alloys than that welded with conventional fusion welding technologies benefited from the lower welding peak temperatures [1]. In general, two difficult challenges received increasingly attention for the FSW of large-scale aerospace aluminum alloy structures: the in situ repair of the welding defects and filling the keyhole at the end of the weld seam [2,3]. The repair technologies based on fusion welding processes, such as TIG and MIG, were not applicable for repairing the high-strength aluminum alloy FSW structures, because the welding thermal process might further decrease the strength of the heat affect zone (HAZ) and cause greater residual stress and distortion [4].…”

Section: Introductionmentioning

confidence: 99%

Improving the Weld Formation and Mechanical Properties of the AA-5A06 Friction Pull Plug Welds by Axial Force Control

Gao

Yang

Cui

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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In the present study, the weld formation and mechanical properties of the AA-5A06 friction pull plug welded (FPPW) joints were improved by controlling the axial force history. Several defect-free FPPW joints were made successfully by using the welding parameters of 15-20 kN/s axial loading rate, 20-30 kN axial welding force and 6-7 mm axial feeding displacement. The results indicated that using higher axial loading rate and axial welding force produced more stable heat generation and shorter frictional heating time between the frictional interface. In this case, the plastic flow of the materials around the hole could be further improved since the axial feeding displacement of the plug was increased. The maximum ultimate tensile strength (UTS) and elongation of the FPPW 5A06 joints were 314 MPa and 4.8%, respectively. The thermal mechanically affect zone (TMAZ) had the lowest hardness value throughout the joint and was found as the fracture location to all the tensile samples. The softening of TMAZ was mainly caused by the weakening of the cold work hardening and the coarsening of grains.

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Interface behaviours and mechanical properties of filling friction stir weld joining AA 2219

Cited by 49 publications

References 19 publications

Exploring the hybrid metal extrusion and bonding process for butt welding of Al–Mg–Si alloys

Exploring the hybrid metal extrusion and bonding process for butt welding of Al–Mg–Si alloys

Effect of Process Parameters on Weld Quality in Vortex- Friction Stir Welding of 6061-T6 Aluminum Alloy

Improving the Weld Formation and Mechanical Properties of the AA-5A06 Friction Pull Plug Welds by Axial Force Control

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