The Effect of Plug Rotation Speed on Micro-Structure of Nugget Zone of Friction Plug Repair Welding Joint for 6082 Aluminum Alloy

Li, Defu; Wang, Xijing

doi:10.3390/ma14185287

Cited by 3 publications

(1 citation statement)

References 15 publications

(30 reference statements)

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“…Many recent investigations have devoted to repairing the exit-hole in FSW. Li et al [8,9] and Sun et al [10] successfully repaired exit-hole in 6082 and 2219 aluminium alloys using friction plug welding (FPW) technique. However, pre-machining of the exit-hole as a tapered hole and grinding of the sides of the repaired joint were required.…”

Section: Introductionmentioning

confidence: 99%

Exit-hole repairing in 7475 aluminium alloy welded joints based on refill friction stir processing

Yuan

Kang

Jiang

et al. 2023

Science and Technology of Welding and Joining

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In this study, the refill friction stir processing (RFSP) method was utilised to repair a exit-hole defect located at the end of the friction stir welding (FSW) joints in 7475 aluminium alloy plate. The morphology, macroscopic defects, and mechanical properties of the repaired joints were investigated. The results demonstrate that the exit-hole was successfully refilled after RFSP. Material flow caused the refill voids, annular grooves, and un-stirred material defects. The maximum strength reached 415 Mpa, equal to 105% of the base defect-free weld. The mechanical properties of repaired joint were largely influenced by the stir zone (SZ) boundary and un-stirred material defects.

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Section: Introductionmentioning

confidence: 99%

Exit-hole repairing in 7475 aluminium alloy welded joints based on refill friction stir processing

Yuan

Kang

Jiang

et al. 2023

Science and Technology of Welding and Joining

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Mechanism of grain refinement in FSW joints of 6063-T6 aluminum alloy under different rotational speeds

Sun,

2024

Applied Mathematics and Nonlinear Sciences

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The inherent properties of aluminum alloys often result in defects like deformation and porosity in joints and welds created through conventional fusion welding. Our paper investigates the impact of varying rotational speeds in the friction stir welding of 4mm thick 6063-T6 aluminum alloy, focusing on microscopic grain refinement and mechanical property alterations in T-joints. Using mechanical stretching and numerical simulation methods, we observed that the initial weld joint is robust, with minimal flying edges and a distinct fish-scale pattern on the surface. Moreover, the grain sizes in the weld’s core area are notably smaller than those in the region affected by the upper axial shoulder. The mechanical properties of the joint experienced a first increase and then a decrease in mechanical properties when the friction stir welding rotational speed, was increased from 600r/min to 1500r/min. Moreover, in 1000r/min rotational speed, the material welded tensile strength and yield strength of the best tensile strength compared to the raw material to enhance the 21MPa, yield strength of 30MPa, elongation close to the raw material of 89.86%.

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Residual Stress Redistribution Analysis in the Repair Welding of AA6082-T6 Aluminum Alloy Joints: Experiment and Simulation

Chen

Duan²,

Wang

et al. 2022

Materials

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Residual stress has a three-dimensional scale effect (length, depth, and width) in the process of repair welding, which has a detrimental impact on the service of the aluminum alloy welded structures in high-speed trains. This paper aims to systematically analyze the effects of the repair welding dimension on the residual stress redistribution and obtain the optimal repair welding principles. A combination of blind-hole drilling method and stress linearization in BS7910 was adopted to investigate residual stress redistribution under various repair welding dimensions. The results indicate that repair welding dimension was in accordance with the principle of “SNL (shallow, narrow and long)” and the optimal repair length, depth, and width of butt joints in this study were 15t, 0.25t, and t, respectively (t is the plate thickness of butt joints).

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The Effect of Plug Rotation Speed on Micro-Structure of Nugget Zone of Friction Plug Repair Welding Joint for 6082 Aluminum Alloy

Cited by 3 publications

References 15 publications

Exit-hole repairing in 7475 aluminium alloy welded joints based on refill friction stir processing

Exit-hole repairing in 7475 aluminium alloy welded joints based on refill friction stir processing

Mechanism of grain refinement in FSW joints of 6063-T6 aluminum alloy under different rotational speeds

Residual Stress Redistribution Analysis in the Repair Welding of AA6082-T6 Aluminum Alloy Joints: Experiment and Simulation

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