TWI Digital Library

A nonlinear dynamic model to study the axial force and torque in the tool of a friction stir welding (FSW) process was developed by training an artificial neural network (ANN) multi-perceptron layer structure with a nonlinear autoregressive exogenou…

Experiments were undertaken to investigate the evolution of welding forces and torque generated during robotic friction stir welding of circular and semicircular butt welds in 6082-T651 aluminium alloy plates (thickness 6 mm). Welding was performed …

With regard to the application of AA 2219 aluminium alloys to space launch vehicle propellant storage tanks, an investigation is presented into the influence of process parameters (tool rotational speed, shoulder downward force and weld transverse s…

An experimental investigation was undertaken to study the effects of different pin profiles (threaded conical, square, pentagon and hexagon) and the same process parameters on temperature distribution around the tool and resulting microstructure dur…

A feasibility study was undertaken to investigate the use of friction stir welding to join B4C particle reinforced Al metal matrix composite plates (thickness 8 mm) that form the neutron absorber tubes of the basket of a spent nuclear fuel cask. Wel…

An experimental procedure based on a Gleeble 3500 thermomechanical testing system was developed to investigate hot deformation parameters in the high temperature range for application to friction welding related processes. Experiments were conducted…

In relation to the production of local metal matrix composites (MMCs) by friction stir processing (FSP), an investigation was undertaken into the influence of tool geometry and process parameters on the shape of the nugget zone and the assessment of…

Butt joints were fabricated between A6063 aluminium alloys and S45C mild steel by friction stir welding (FSW) and the effect of material flow on the weld interface formation was investigated using the stop action technique. FSW experiments were unde…

A review is presented of the application of CFD (computational fluid dynamics) to numerical modelling of the friction stir welding (FSW) process, incorporating coupled physical phenomena such as heat generation, heat transfer and metal flow. Issues …

The effects of multiple overlapping friction stir weld runs (with 100% overlap) on the welding parameters and weld properties during the repair of high-strength AlCuMgZn alloy were investigated. Square butt welds were made in 7050-T7451 alloy (Al, 6…

Ultrafine grained test pieces of aluminium, copper and steel produced by the accumulative roll bonding process were friction stir butt welded at various revolutionary pitches, and the microstructures and mechanical properties (tensile strength, Vick…

A discussion is presented on research studies carried out to develop friction stir welding (FSW) as a method for the production of thick (50.8-76.2 mm; 2-3 in) aluminium alloy 7050 tailored blanks suitable for use in the aerospace industry. Single r…

Thick section friction stir welds were made in 25.4 mm (1 in) 5083-H131 and in 18.4 mm 2195-T8P4 aluminium alloy plates by single-pass friction stir welding (FSW) using new welding tool designs. The alloys are used for aerospace applications. The sh…

Aluminium alloy A6N01-T5 (Al, 0.63%Mg, 0.53%Si) hollow extrusions suitable for joining by friction stir welding, to be used in the generation of Japanese railway rolling stock, were designed, and the static and fatigue tensile strength of joints wer…

A new "stop action" technique was used to investigate material flow during the friction stir welding of aluminium alloy 6061-T6 plate of thickness 6.4 mm (0.25 in). The technique involved stopping the welding process and examining the microstructure…

Aluminium alloy 7050-T751 was friction stir welded using a range of process parameters, and finite element analysis was used to calculate the time-temperature distributions so that the resultant weld properties could be related to the welding parame…

The use of friction stir welding for the repair of cracks in aluminium alloy 2024 aircraft wing skin structures, and the repair fatigue life were investigated. An artificial crack, 42 mm in length, in a flat section 2024-T351 alloy of 3.2 mm thickne…

Friction stir welding was used to produce a space shuttle external barrel section of 2195-T8 Al-Cu-Li alloy. Seven panels (joint thickness of 8.1 mm (0.32 in)) were joined to form a barrel 8.4 m (27.5 ft) in diameter and 4.6 m (15 ft) long. A comput…

The microstructure, crystallographic texture and grain distribution were determined in a transverse cross section of a friction stir weld and in a plan-view section through the embedded friction stir welding (FSW) tool. The weld was obtained by FSW …

The microstructure, mechanical properties and fatigue behaviour of friction stir welded (FSW) and MIG welded butt joints in aluminium alloy 2519-T87 (Al, 5.3-6.4%Cu, 0.1-0.5%Mn, 0.02-0.1%Ti) plate of 25.4 mm thickness were compared. Friction stir we…