TWI Digital Library

Friction stir welding (FSW) was employed to fabricate overlap joints in thin AA 7075-T6 aluminium alloy (Al, 5.1-6.1%Zn, 2.1-2.9%Mg, 1.2-2%Cu) sheets (thickness 0.8 mm) coated with an anticorrosive aluminium layer and the microstructure and mechanic…

A temperature monitoring system incorporating thermocouples mounted in the probe and shoulder was employed to measure the temperature of the rotating tool during the fabrication of dissimilar butt joints between A6005C aluminium alloy (Al, 0.5%Mg, 0…

Hot rolled AZ31 magnesium alloy plate of 6.3 mm thickness was friction stir welded (FSW) at rotation rates of 600-4000 rpm and a constant welding speed of 100 mm per minute and the microstructure and mechanical properties of the joints were investig…

With regard to the development of ausformed H13 tool steel for high strength friction stir welding (FSW) tools, an investigation was undertaken to explore methods to improve equal channel angle extrusion (ECAE) as the deformation step. Studies invol…

The fatigue performance of friction stir welded butt joints in 2024-T3 aluminium alloy plate (thickness 6.35 mm) was investigated by adopting six different tool designs and using a design of experiments analysis over a wide range of process paramete…

Fatigue testing was performed on welds joining AA2024 (AI4.5Cu1.4 Mg0.5Mn) alloy to TI6Al4V alloy by having AA100 strip as an interlayer utilizing friction stir lap welding (FSLW). During FSLW, the pin bottom was aimed not to touching the Ti6Al4V pl…

The stationary shoulder friction stir welding (SSFSW) process was employed to fabricate defect-free joints in a variety of aluminium alloys and experiments were undertaken to investigate the microstructure and mechanical properties of the joints. Th…

Numerical modelling and experimental measurements were undertaken to investigate the heat flux and residual stresses during a rotary friction welding process to fabricate joints between an ASTM A36 steel pipe (0.11%C, 0.2%Si, 0.92%Mn, 0.02%Cr, 0.02%…

The main factors to be considered in the automation and robotisation of friction stir welding (FSW) and the production of one-, two- and three-dimensional welds were identified. A FSW robotic cell was developed and force control algorithms were defi…

A fully Lagrangian smoothed particle hydrodynamics method was employed to simulate the bobbin tool friction stir welding process for aluminium alloys in order to evaluate tool torque and forces as well as material flow for different advancing speeds…

The corrosion behaviors of friction stir welded (FSW) joint of 7075 aluminum alloy with and without shot peening treatment (SPT) were investigated by method of acid salt spray. The macroscopical and microscopical corrosion features were observed by …

A device was designed and manufactured to facilitate accurate monitoring of forces, torque and tool temperature during friction stir welding (FSW) and for use as a weld quality indicator in relation to issues such as tool wear, lack of tool penetrat…

Following a summary of the current applications for friction stir welding at Boeing, the Brotje Automation FSW system is introduced. Presentation slides give notes on complex contour FSW in a large work envelope, the characteristics of a robust prod…

The large load friction stir spot welding (LL-FSSW) technique was applied to a low carbon steel sheet in order to achieve lap joints at a low temperature, and the microstructure and hardness of the joints were investigated. The composition of the gr…

A simultaneous double sided corner Ad-Stir fillet stationary shoulder friction stir welding (SSFSW) process was developed for LNG (liquefied natural gas) storage tank construction. The microstructure and mechanical properties of welded joints were i…

Artificial intelligence (Al) and machine learning (ML) are major drivers for improving quality of manufacturing process including Friction Stir welding. The specific parameter that has 100% effect on the quality of FSW has not yet been identified, h…

Based on the detailed analysis of the microstructure on top surface of friction stir welded (FSW) joint of 2024 aluminum alloy by optical microscope, XRD and transmission electron microscope. SEM was employed to obtain the in-situ corrosion developm…

An investigation was undertaken to evaluate the separation forces exerted by the tool on the fixture compared to the weld process loads generated during butt welding of self reacting bobbin friction stir welds. Two tempers of an aluminium alloy were…

The principles are presented of stationary shoulder friction stir welding (FSW) with examples of the weld microstructures that can be achieved. Trials were conducted on 6.35 mm plate of Ti-6%Al-4%V titanium alloy, with spindle speed of 400 rpm and t…

A series of friction stir welding (FSW) experiments using threaded tool pins and AA5083 (Al, 4.5%Mg, 0.6%Mn) or A356 (Al, 7%Si, 0.3%Mg) workpiece alloys was undertaken in order to understand material flow mode within thread spaces and its influence …