TWI Digital Library

Friction stir welding (FSW) tools, equipment and auxiliary devices were developed for application to heavy section aluminium alloy plate (thickness 40-70 mm), and the microstructure and mechanical properties of welded joints fabricated by the proced…

Butt joints between dissimilar aluminium alloys were fabricated by friction stir spot welding (FSSW) in order to investigate the influence of process conditions on material flow phenomena and intermixing patterns. The dissimilar joint combinations s…

An experimental study of friction stir welding (FSW) to join 2017A-T6 with 7075-T6 and 6013 aluminium alloys, by applying different welding parameters and conditions, was performed with the aim of analysing the microstructures and properties of the …

The evolution of microstructure and mechanisms occurring at the (sub)micron scale during friction stir spot welding of transformation induced plasticity (TRIP) steel were investigated. Welds were made in TRIP690 steel (0.24%C, 1.6%Al, 2%Mn, 0.3%Si, …

A short review is presented of the development of a friction stir welding process for steel and other hard metals using W-Re tool materials to produce repeatable, thick-section welds with minimal tool deformation. Issues discussed include: W, 25%Re …

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…

Some numerical and experimental results are presented to illustrate the ability of the SignaStir laser ultrasonic testing system to monitor the occurrence of voids, cavities and lack of root penetration defects during friction stir welding (FSW). A …

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…

Dissimilar joints between AA 6061 aluminium alloy (Al, 0.91%Mg, 0.52%Si, 0.6%Fe) sheets (thickness 2 mm) and zinc-coated HIF-GA (high strength interstitial-free galvannealed) steel (0.002%C, 0.09%Si, 0.47%Mn) sheets (thickness 1 mm) were fabricated …

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…

In the last fifteen years, friction stir welding has developed from a laboratory curiosity to an important fabrication technique for lightweight, lower softening temperature alloys. Industrial implementation of joining magnesium has been limited alm…

A modified Gleeble hot torsion test was used to simulate the stir zone microstructures in types 304L and 310 stainless steels obtained during friction stir welding (FSW). A Gleeble 3800 with a torsion mobile conversion unit was used to perform the t…

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…

Friction stir welding (FSW) experiments on aluminium alloys were conducted using transparent PVC material to visualise dynamic material flow by direct observation, and the characteristics of two types of vortex were investigated. A single block of P…

A methodology is presented to define conical tool geometry and process parameters for friction stir welding (FSW) of thin plates. A calculation algorithm integrating a basic thermal model, tool geometry and process kinematics is proposed, the proces…