TWI Digital Library

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…

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 …

Fusion devices include plasma facing components consisting of copper-based heatsinks embedded with cooling channels to handle the high operational heat loads. Stationary shoulder friction stir channelling (SSFSC), trademarked as Coreflow®, is a …

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…

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…

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…

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…

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…

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 (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…

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…

Physical simulations were undertaken on cylindrical specimens of 304L stainless steel using a "Gleeble 1500" thermomechanical simulator in the form of hot axial compression tests so that the material underwent similar heating and cooling profiles to…

Based on the hypothesis that uniform friction stir weld quality can be produced by maintaining a constant weld zone temperature, an investigation was conducted to develop a feedback strategy and a closed-loop control algorithm to maintain constant t…

The microstructure, hardness, indentation profile, tensile strength, fracture cracking and grain boundaries of friction stir overlap welds in 2124 aerospace aluminium alloy were investigated. Welds were made in EN AW-2124 heat-treatable wrought AlCu…

Tensile testing was used to characterise and compare the fracture locations and their influencing factors for a number of friction stir welded aluminium materials (AA-1050, AA-2017, AA-6061). Friction stir welding was carried out on sheets of thickn…

An adjustable tool was employed during friction stir welding (FSW) of A1050 pure aluminium sheets (thickness 5 mm) and the effects of the tool shoulder and probe on the stir zone shape and defect formation were investigated by changing the rotationa…

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…

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…

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…