Recent progress on control strategies for inherent issues in friction stir welding

Meng, Xiangchen; Huang, Yongxian; Cao, Jian; Shen, Junjun; Santos, Jorge F. dos

doi:10.1016/j.pmatsci.2020.100706

Cited by 431 publications

(162 citation statements)

References 288 publications

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“…In present study, one buss bar of 10cm of long and made into two pieces for the purpose of making the Z-shaped lugs in that Z-shaped every straight piece of 2cm length and we use 1\2 cm for the purpose of the curvature [12]. Like this, we have made two lugs and made an internal tapping on one side of each lug because by this tapping only we attach these to the electrode holders.…”

Section: Fabricationmentioning

confidence: 99%

Design and Fabrication of Portable spot-welding machine for sheet metal operation

2021

IJETER

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Spot welding machine requires a lot of power, occupies large area and it is heavy to transport, restricted by height and does not weld all angle. On present work, we have tried to overcome the above problems by restructuring the design. Newly designed apparatus was simpler, lighter, portable, compact and flexible machine which will be able to weld at any angle and can be easily operated by even a non-skilled Labor with much ease and required accuracy. The first thing is the fabrication of the portable spot-welding machine which is divided into two phases, first is the formation of basic circuit of machine which includes small transformer of 1.2 kVA with output voltage 0 to 2.2 volt with 2.5-gauge wire & power switch and second is the formation of body and arm mechanism of the machine. For creating this machine, we used modelling software such as Autodesk Fusion 360 and created a prototype based on its design. In this project we made our own transformer according to requirements of specifications for welding as a general transformer used in electronic appliances was costly and as well a Bulky.

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Section: Fabricationmentioning

confidence: 99%

Design and Fabrication of Portable spot-welding machine for sheet metal operation

2021

IJETER

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“…Aluminium is recognised as a favourable conductor material due to its low weight, relatively low and stable cost, high corrosion resistance and good electrical conductivity. Furthermore, friction stir welding (FSW) and friction stir spot welding (FSSW)have become revolutionary welding techniques over the past two decades because of energy efficiency, environmental friendliness and high-quality joints [ 4 ]. According to Fastmarkets [ 5 ], the price of aluminium is almost four times lower than that of copper.…”

Section: Introductionmentioning

confidence: 99%

Influence of Tool Geometry and Process Parameters on the Properties of Friction Stir Spot Welded Multiple (AA 5754 H111) Aluminium Sheets

et al. 2021

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Friction stir spot welding is an emerging spot-welding technology that offers opportunities for joining a wide range of materials with minimum energy consumption. To increase productivity, the present work addresses production challenges and aims to find solutions for the lap-welding of multiple ultrathin sheets with maximum productivity. Two convex tools with different edge radii were used to weld four ultrathin sheets of AA5754-H111 alloy each with 0.3 mm thickness. To understand the influence of tool geometries and process parameters, coefficient of friction (CoF), microstructure and mechanical properties obtained with the Vickers microhardness test and the small punch test were analysed. A scanning acoustic microscope was used to assess weld quality. It was found that the increase of tool radius from 15 to 22.5 mm reduced the dwell time by a factor of three. Samples welded with a specific tool were seen to have no delamination and improved mechanical properties due to longer stirring time. The rotational speed was found to be the most influential parameter in governing the weld shape, CoF, microstructure, microhardness and weld efficiency. Low rotational speeds caused a 14.4% and 12.8% improvement in joint efficiency compared to high rotational speeds for both tools used in this investigation.

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“…Aluminum alloy T-joints, as integral parts of load-bearing structures, can bear both unidirectional and combined stresses, thereby effectively improving the rib plates’ stability without affecting the component’s overall quality. Despite extensive applications in aeronautics, astronautics, and railway vehicles [ 1 , 2 ], aluminum alloy T-joints produced by riveting, extrusion forming, traditional fusion welding, or bonding still have numerous deficiencies, including limited mold shape, residual stress concentration, and burning loss of alloying elements [ 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Stirring Pin Rotation Speed on Microstructure and Mechanical Properties of 2A14-T4 Alloy T-Joints Produced by Stationary Shoulder Friction Stir Welding

Yang

Zhao

et al. 2021

Materials

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In this study, 2A14-T4 Al-alloy T-joints were prepared via stationary shoulder friction stir welding (SSFSW) technology where the stirring pin’s rotation speed was set as different values. In combination with the numerical simulation results, the macro-forming, microstructure, and mechanical properties of the joints under different welding conditions were analyzed. The results show that the thermal cycle curves in the SSFSW process are featured by a steep climb and slow decreasing variation trends. As the stirring pin’s rotation speed increased, the grooves on the weld surface became more obvious. The base and rib plates exhibit W- or N-shaped hardness distribution patterns. The hardness of the weld nugget zone (WNZ) was high but was lower than that of the base material. The second weld’s annealing effect contributed to the precipitation and coarsening of the precipitated phase in the first weld nugget zone (WNZ1). The hardness of the heat affect zone (HAZ) in the vicinity of the thermo-mechanically affected zone (TMAZ) dropped to the minimum. As the stirring pin's rotation speed increased, the tensile strengths of the base and rib plates first increased and then dropped. The base and rib plates exhibited ductile and brittle/ductile fracture patterns, respectively.

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Recent progress on control strategies for inherent issues in friction stir welding

Cited by 431 publications

References 288 publications

Design and Fabrication of Portable spot-welding machine for sheet metal operation

Design and Fabrication of Portable spot-welding machine for sheet metal operation

Influence of Tool Geometry and Process Parameters on the Properties of Friction Stir Spot Welded Multiple (AA 5754 H111) Aluminium Sheets

Effect of Stirring Pin Rotation Speed on Microstructure and Mechanical Properties of 2A14-T4 Alloy T-Joints Produced by Stationary Shoulder Friction Stir Welding

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