TWI Digital Library

In relation to the development of a friction stir welding (FSW) process to seal copper canisters for nuclear fuel waste, an investigation was undertaken into material and heat flow in FSW copper plates (thickness 50 mm) by inserting brass rods into …

Friction stir processing (FSP) was employed to stir electroless copper coated SiC particles with a core shell structure to produce SiC/Cu particle reinforced aluminium matrix composites in the stir zone of AA 6061-T651 aluminium alloy plates with th…

Friction stir spot welding (FSSW) experiments were undertaken on sheet specimens of similar and dissimilar combinations of AA 2024-T3 (thickness 1.27 mm), AA 2024-O (2.2 mm) and AA 7075-T6 (1.27 mm) aluminium alloys under various process conditions,…

With regard to the use of friction pull plug welding to close out the termination hole associated with pin tool retraction during friction stir welding of circumferential welds in pressurised cryogenic propellant tanks, an investigation is presented…

A review is presented of various models developed to understand the effects of thermal cycles and metal flow behaviour on the microstructure and properties of welded joints fabricated by friction stir welding of steel, and a comprehensive numerical …

An integrated multi-physics model was employed to predict the temperature distribution, the post-weld grain size distribution and the local subgrain size distribution around the pin during friction stir welding (FSW) of 6061 aluminium alloys. The mu…

Metallographic observations, hardness distribution measurements and fatigue tests were undertaken to investigate the discontinuity state related to the crack nucleation site in butt joints fabricated in 2024-T3 aluminium alloys (Al, 3.8-4.9%Cu, 1.2-…

In relation to the application of friction stir welding (FSW) to the production of metallic aircraft fuselages, a report is presented into the evolution of the MUVAX (multi use vacuum assisted exoskeleton) concept within the framework of the LuFo V-…

An investigation is presented into a systematic model based, real time process monitoring framework to analyse the performance and behaviour of the friction stir welding (FSW) process and into the framework's ability to predict weld quality threshol…

The Taguchi method was employed to determine optimum process parameters for friction stir welding of dissimilar joints between AA 6061 (Al, 0.84%Mg, 0.54%Si, 0.4%Fe, 0.24%Cu) and AA 7075 (Al, 5.58%Zn, 2.28%Mg, 1.6%Cu) aluminium alloys. Welding was p…

An investigation is presented into the bending properties of welded joints prepared by friction stir welding (FSW) in various structural aluminium alloys during which the influence of process conditions and alloy composition (Mg, Si, Zn levels) was …

An investigation was undertaken into the efficiency and cost effectiveness of two process chains for the production of an AW-70xx aluminium alloy telescopic beam for a crane boom (length 8 m, sheet thickness 4 mm), and a comparison between friction …

Various dissimilar butt joints were fabricated between 2017A-T451 (Al, 4.14%Cu, 0.72%Mg), 6082-T6 (Al, 1.03%Mg, 0.92%Si) and AlSi9Mg (Al, 8.6%Si, 0.31%Mg) aluminium alloys by friction stir welding using a high pin tool rotational speed (1400 or 1800…

An investigation was undertaken to examine the use of an industrial serial robot incorporating dual loop force/position control to reduce the investment cost and increase process flexibility in friction stir welding (FSW) by compensating the lateral…

A pinless tool with involute grooves on its shoulder surface was designed to facilitate friction stir spot welding (FSSW) of 2024-T3 aluminium alloy (Al, 3.8-4.9%Cu, 1.2-1.8%Mg, 0.3-0.9%Mn) sheets (thickness 1.5 mm) and the influence of process para…

The tool workpiece thermocouple (TWT) temperature measurement method was applied for optimisation of the initial welding phases (plunge and dwell) in conventional FSW (friction stir welding) and FSSW (friction stir spot welding), and an analysis of …

The effects of laser surfacing on the microstructure and corrosion properties of friction stir welds in 6.34 mm (0.25 in) thickness plates of aluminium alloys 2024-T351 and 7010-T7651 were studied. Specimens were laser surfaced using an excimer lase…

Developments in non-destructive techniques for detecting small defects in friction stir welds in thin aluminium plates in aerospace applications are considered. The principles of ultrasonic phased-array technology and eddy current array technology a…

Friction stir welded joints, produced in an extruded profile of aluminium alloy 6082-T6 using run on and run off plates, were evaluated by measurement of mechanical properties. Plate of 6 mm thickness was welded using a range of process parameters, …

Flow in friction stir welds in Al-Cu-Li aluminium alloy 2195-T8 plate (8.1 mm thickness) was observed by placing markers in the faying surface prior to welding. Markers of aluminium alloy 5454-H32 (1.8 x 2.7 mm) were placed in slots milled in the fa…