TWI Digital Library

Following a description of the swept FSW spot welding process, experimental work on welding conditions is presented. A design of experiments (DOE) approach was employed to examine the effect of process parameters on unguided lap shear tensile streng…

In relation to the development of corrosion barrier capsules for spent nuclear fuel disposal, friction stir welding experiments were conducted on oxygen-free copper plate specimens (thickness 20 mm) using different joint preparation, shielding gas a…

Square butt welds of AA 7075-T6 sheet (thickness 1.3 or 3.2 mm) to AA 7075-T6 extrusions were fabricated by friction stir welding (FSW) procedures incorporating the controlled introduction of defects, and the impact of the defects on joint mechanica…

Nondestructive testing of friction stir welds is discussed. The ultrasonic testing of friction stir welded joints, advantages of phased array testing and test applications are presented briefly. The eddy current array testing technique is illustrate…

Coupons with both triangular and rectangular gaps were prepared from AA 2024 aluminium alloy plate stock by friction stir welding (FSW) and volumetric defect formation was investigated by a neural network-based electronic NDE (e-NDE) technique. The …

Simultaneous double-sided friction stir welding (DFSW) experiments were undertaken on AMX 602 alloys (Mg, 6%Al, 0.5%Mn, 2%Ca) and the influence of diverse material flows caused by differing process parameters (rotation direction and travel speed) an…

Friction stir welding is widely applied in several industries such as manufacturing rolling stock, automotive parts and ship building. Especially, EV will be expected to popularize in these two or three decades in view of reducing CO2. The parts of …

Alternative friction stir welding tool shoulder materials to improve welding speed and quality were evaluated. The materials, which were compared with tool steel using a tool designed for exchangeable shoulder inserts, were: nitrided tool steel, Inc…

Experimental methods were developed to track material flow and mixing during the friction stir welding (FSW) process. Experiments were conducted with butt joints of 6.35 mm (0.25 in) thickness 7050-T7451 aluminium alloy plates. The FSW tool was H13 …

Low temperature post weld ageing heat treatment, with and without deep cryogenic pretreatment, was applied to friction stir welded joints of 2024-T351 (Al, 4.3%Cu, 1.6%Mg, 0.7%Mn) alloys, and the microstructure and mechanical properties of the joint…

A stop-action technique was used to stop tool motion during friction stir welding of aluminium alloys in order to study the interactions between the parent material and welding tool pin in the keyhole. Welds were made in 25 mm thick Al-Cu-Li 2195 pl…

With regard to the production of wear resistant friction stir welding (FSW) tools by laser implantation of ceramic particles, an investigation was undertaken to examine the effect of laser implantation on tool surface hardness, abrasive wear and lif…

The effects of pre and post weld heat treatments on the strength, fracture toughness and fatigue crack propagation of welds made by friction stir welding (FSW) in aluminium alloy 6013-T6 sheet material, which may replace the 2024-T3 skin alloy for f…

Friction stir welding experiments were conducted on AA 2024-T3 Al-Cu-Mg alloys to investigate the influence of backplate design on joint microstructure and mechanical properties. Trials were performed using three specially designed backplates based …

The effect of welding conditions (tool rotational speed and tool holding time) on static strength was studied for dissimilar friction stir spot welds between 2017-T6 (Al, 3.5-4.5%Cu, 0.8-1.5%Mg) and 5052 (Al, 2.2-2.8%Mg) aluminium alloy sheets (thic…

An experimental study was carried out on friction stir welded aluminium alloy tailored welded blanks (TWB's) to determine mechanical properties and microstructural characteristics in order to evaluate friction stir welding (FSW) as a feasible method…

AZ31 magnesium alloy sheets (thickness 3 mm) were joined by TIG welding and the effect of two run rapid cooling friction stir processing (RC-FSP) on welded joint microstructure and mechanical properties was investigated. TIG welding was undertaken a…

The influence of pin length and insulating anvil material on friction stir spot welding (FSSW) of thin (0.9 mm) 6111-T4 aluminium (Al, 0.73%Si, 0.65%Mg, 0.96%Cu, 0.3%Mn, 0.2%Fe) was investigated. Welds were made varying the length of the tool pin (1…

5A06 aluminium alloy (Al, 6.8%Mg, 0.5%Mn) sheets (thickness 5.17 mm) were joined by friction stir welding (FSW) and the microstructure and mechanical properties of the welded joints were investigated. Welding was performed using a tool pin with a sc…

The tool wear, performance life and optimal parameters for the friction stir welding (FSW) of mild and stainless steels were investigated. Bead-on-plate welds were made in AISI 304L stainless steel (6 mm thickness) and A36 cold-rolled mild steel (6 …