TWI Digital Library

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…

This paper describes the joining criterion for lap joining of dissimilar metal materials of aluminum and stainless steel by friction stir. A criterion for evaluating the joined state or non-joined state is proposed, which is led by the concept based…

Friction stir spot welding (FSSW) was employed to fabricate dissimilar lap joints between a 6000 series aluminium alloy (Al, 1%Si, 0.5%Mg) in the T4 condition and SPCC mild steel (0.05%C, 0.01%Si, 0.14%Mn) without formation of intermetallic compound…

With regard to the application of friction stir welding (FSW) to the production of launcher tanks holding cryogenic liquids, an investigation was undertaken to establish a robust and industrialised FSW process for AA 2219 alloys in T87 and T851 cond…

The bobbin tool or self-reacting tool variant of the friction stir welding process was investigated on butt joints of various 2000 series aluminium alloys for aircraft fuselage applications; welding feasibility tests were conducted in pin length con…

In relation to the requirement for automatic inspection of weld quality during the friction stir welding (FSW) process, the "MonStir" process monitoring system was developed to analyse measured process forces and their frequency spectra, and an inve…

Electron backscattering diffraction (EBSD) was employed to examine the grain refinement during rapid cooling friction stir welding of commercially pure copper sheets (thickness 2 mm) and the application of a liquid CO2 cooling technique to reduce th…

Friction stir welding (FSW) experiments were undertaken on AA 6061-T6 aluminium alloys to investigate the effects of liquid cooling of tooling on spindle speed, spindle torque, spindle power, forge force, and the amount of material plastically defor…

The relationship between the friction stir weld (FSW) microstructure and local corrosion susceptibility of three aluminium alloy (2024-T351, 7010-T7651 and 5456-H116) plates (4.5-12.7 mm thickness) as well as a dissimilar 2024/7010 weld was investig…

As part of a study investigating FSW as a method for joining the lids on copper canisters for the long term storage of nuclear waste, the development of microstructure and heat flow during the FSW process was experimentally investigated. The microst…

The weldability of 2 mm thickness thixomoulded sheets of AZ91D magnesium alloy by friction stir welding (FSW) was studied as a function of tool rotation speed (880-1750 rpm) and specimen travel speed (50-500 mm/min). The composition of the sheet was…

A series of models was used to study weld formation in 6000-series aluminium alloy in the friction stir welding process. Weld formation was considered as three separate thermomechanical processes: coupled friction heat generation; plastic flow slip …

Full field displacement measurement with digital image correlation was used to study the mechanical properties of friction stir welded joints in aluminium alloy plates. Welds were made in 5454-O and 5454-H sheet of 3.9 mm thickness, and 2195-T8 plat…

Liquid metal dealloying is a promising method relying on the selective dissolution of a component from a precursor alloy into a liquid metal, resulting in production of bicontinuous porous surface on the precursor alloy. To expand use of the porous …

An experimental and numerical analysis of the wear of a polycrystalline boron nitride (PCBN) friction stir welding (FSW) tool is overviewed as presentation slides. Topics highlighted include: FSW plunge trials of EH46 shipbuilding steel at a plunge …

The integration of friction stir welding (FSW) into the manufacturing sequence of spinformed domes of aluminium alloys is presented in terms of its optimisation and the specific iterations required with the prior and follow-up procedures of the manu…

An investigation is presented into the use of a friction stir welding/forging process to fabricate tee and I-beam shapes with integral radial shaped fillets, the optimisation of process parameters for different alloys and shapes, and the results of …

Friction stir welding (FSW) experiments were undertaken on sheet specimens (thickness 5 mm) of 5454-H111 aluminium alloys and the relationships between process forces, spindle power and tool geometry were investigated. Twelve FSW tools with specifie…

A friction stir welding (FSW) methodology incorporating laser tracking and constant force control technologies was developed in order to fabricate large, thin-walled aircraft floor structures. The material chosen for study comprised sheet specimens …

With regard to the development of dissimilar aluminium-steel joint fabrication for automotive applications such as body-in-white, an investigation incorporating experiment and numerical simulation was undertaken to examine the dissimilar friction st…