TWI

AA 2219-T87 (Al, 5.8-6.8%Cu, 0.2-0.4%Mn) aluminium alloy plates (thickness 8 mm) were joined by friction stir welding (FSW) and their microstructure, mechanical properties and corrosion behaviour were investigated. FSW experiments were conducted usi…

Friction stir welding (FSW) experiments were undertaken on stacked laminates of pure copper and 60/40 brass (60%Cu, 40%Zn) to investigate material flow patterns and microstructural changes during welding. FSW was conducted using a threaded MX Tri-fl…

With regard to the dependence of shoulder friction generation in bobbin friction stir welding on the interference (compression) between the substrate and the tool, an investigation was undertaken into the effects of different interference (compressi…

Friction stir welding was employed to fabricate butt joints in Ti-6%Al-4%V sheets (thickness 2 mm) and the effect of process parameters on joint microstructure and plastic deformation behaviour was investigated. Welding experiments were conducted at…

Friction stir welding (FSW) experiments were conducted on magnesium alloys, wrought AZ31 (Mg, 3%Al, 1%Zn) and cast AZ91 (Mg, 9%Al, 0.6%Zn), to investigate the effect of process conditions on microstructure and hardness. Welding was performed at rota…

Butt joints were fabricated in sheet specimens of 2017A-T451 alloys (Al, 4.14%Cu) and cast plates of Al, 8.6%Si, 0.31%Mg by friction stir welding (FSW) and their microstructure and mechanical properties were investigated. Welding experiments were co…

Friction stir welding experiments were undertaken on Ti-6%Al-4%V sheets (thickness 2 mm) in order to investigate the influence of process conditions on stir zone microstructure and local texture. Welding was performed at rotational speeds of 225-300…

With regard to the use of copper canisters for the storage of spent nuclear fuel, an investigation is presented into a cascade controller to maintain probe temperature and to control power input and tool depth during friction stir welding procedures…

Kahn notched tear tests and fractography were employed to investigate variations in toughness and fracture mode across the weld zones in friction stir welded AA 7449 plates (thickness 40 mm) in the TAF (temper for age-forming) condition. Welding was…

A 3D computational fluid dynamics model was developed to conduct numerical simulations of heat generation, material flow and temperature profiles during reverse dual-rotation friction stir welding, a process variant in which the tool pin and the ass…

SiC particle reinforced 2124Al metal matrix composite (MMC) plates (thickness 8 mm) were joined by friction stir welding (FSW) and the relationship between process parameters, weld defect formation and joint mechanical properties was investigated. T…

The mechanical properties and microstructures of friction stir butt welds in 6.4 mm and 12.7 mm thickness quenched and tempered martensitic steel plate were compared with those of GMA butt welds in the same parent metal. The friction stir welds in t…

Welded joints were fabricated in AZ31 magnesium alloy (Mg, 3.01%Al, 0.9%Zn, 0.5%Mn) sheets (thickness 2 mm) by bobbin tool friction stir welding (BTFSW) and the influence of process parameters (rotational and welding speeds) on their microstructure …

A fully coupled thermomechanical formulation was proposed for the numerical modelling of friction stir welding (FSW) to facilitate the efficient simulation of different types of material flows and accurate computation of the resulting thermomechanic…

The feasibility of friction stir welding (FSW) for welding aluminium alloy 7020, used for the construction of light armoured fighting vehicles, was investigated and compared with MIG welding. Two joint configurations were tested: butt welding in 100…

A plastic replication technique was employed to investigate surface crack initiation and growth in 2024-T351 Al alloy friction stir welded (FSW) joints during fatigue bending tests. Fatigue failure mechanisms were examined, and a modified Hobson-Bro…

The relationship between microstructure and corrosion of friction stir welded joints in aluminium alloys 2024-T351 (Al, 4.43%Cu, 1.42%Mg, 0.61%Mn) and 7010-T7651 (Al, 5.92%Zn, 2.11%Mg, 1.68%Cu) was investigated. Plate of 6.35 mm (0.25 in) thickness …

A friction melt bonding process was employed to fabricate dissimilar lap joints between ultralow carbon (0.01%C, 0.14%Mn) or dual-phase DP600 (0.08%C, 1.51%Mn, 0.35%Cr, 0.06%Mo) steel grades and 1050, 2024 or 6061 aluminium alloys and the microstruc…

Periodic material phenomena around a threaded pin in friction stir welding (FSW) were investigated with a fully transient thermomechanically coupled numerical simulation, in which the transient motion of the threaded pin was included in the computat…

The microstructure of joints produced between dissimilar Al alloys by friction stir welding (FSW) was studied. FSW was performed for joining of 5083/6061 Al alloy workpieces of 5 mm thickness using a rotation speed of 1800 rpm and a welding speed of…