TWI Digital Library

2024-T3 aluminium alloy (Al, 4.4%Cu, 1.5%Mg) thin sheets (thickness 1 mm) were joined by friction stir welding (FSW), and the effect of process parameters (tool rotation speed and traverse rate) on the microstructure and mechanical properties of the…

The effects of post weld heat treatments on the mechanical properties and corrosion resistance of friction stir welded dissimilar aluminium alloy joints (2024/6056) were studied. Sheets of 4 mm thickness were first joined in heat treatments T3 for 2…

The paper comprises copies of the presentation slides which describe the development of welding experiments and equipment to provide experimental data to validate process models of the friction stir welding process. Data obtained include tool parame…

The feasibility of joining layers of dissimilar metals (aluminium and steel) by friction stir welding (FSW) was investigated. Aluminium (A-1050-O) was placed above steel (JIS S50C carbon steel). The tool revolution was 3000 rpm and the tool feed rat…

Friction stir welding (FSW) is a solid-state welding process, particularly suitable for aluminum alloys. The process allows the production of welds with a high seam strength and low distortion. Despite these benefits, irregularities can occur during…

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 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…

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…

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 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…

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…

Preliminary results from a 3-dimensional heat and material flow computer simulation program for friction stir welding are given and compared with experimental observations. The simulation is based upon solutions of Navier-Stokes equations and nonlin…

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 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…

An investigation is presented into the effects of process parameters (welding and rotational speeds) during friction stir welding (FSW) on the hardness and tensile properties of welded joints fabricated in butt configuration sheet specimens (thickne…

Friction stir processing (FSP) experiments were undertaken on three Ni-based alloys (Alloy 625 (Ni, 21.6%Cr, 8.6%Mo, 3.7%Fe), Alloy 718 (Ni, 23.7%Fe, 18.1%Cr, 3.1%Mo, 1%Ti) and Hastelloy X (Ni, 21.3%Cr, 19.2%Fe, 8.3%Mo)) using a W-Re tool, process p…

An investigation is presented into the metallurgical features of welded joints in various structural aluminium alloys prepared by friction stir welding (FSW) and into the microstructure and hardness distribution of the weld zone. The experimental sp…

The application of friction stir welding to the construction of airframe structures of precipitation-hardened aluminium alloys, using butt, lap and T-joints, is described. A landing gear strut door was manufactured by welding an Alclad 7075-T6 skin …

A fully integrated approach to facilitate optimisation of the friction stir welding (FSW) process was developed, incorporating a model for the FSW process, coupling material flow and thermal analysis, a model for precipitation evolution, a microstru…