TWI Digital Library

Details are reported of application of friction stir welding (FSW) to manufacture of double skin bodies of railway carriages for commuter lines in Japan. A "defect free" FSW process is used to weld double skin panels of length 25 m using hollow extr…

Friction stir welding (FSW) experiments were undertaken on Invar 36 alloy (Fe,36%Ni) sheet specimens (thickness 3 mm) and the microstructure evolution and recrystallisation mechanism were investigated. Bead-on-plate FSW was performed using a polycry…

Dissimilar joints between wrought 5083 and 6111 aluminium alloys and between AZ31 magnesium alloy and 6111 were fabricated by friction stir welding and their microstructure and mechanical properties were investigated. The starting materials were 508…

An experimental study was carried out to investigate the link between the microstructure and the mechanical and corrosion properties for a friction stir welded aerospace aluminium alloy 7349-T6 (Al, 1.4-2.1%Cu, 1.8-2.7%Mg, 7.5-8.7%Zn) developed for …

The feasibility of friction stir welding (FSW) HSLA-65 steel (0.10%C, 1.4%Mn), which is being considered by the US Navy for ship structural applications, was assessed. Single-pass FSW was performed on 6.4 mm (0.25 in) plates and two-pass FSW was per…

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…

High-strength aluminum alloys of the AA7xxx-series are increasingly used in demanding environments owing to their excellent strength-to-weight-ratio. The strengthening mechanism of these alloys is dependent on the precipitation of hardening particle…

A Granular Computing (GrC) Neural-Fuzzy (NF) modelling approach that can learn relational data descriptions from a minimum number of experimental data is proposed for finding optimal process operating windows in friction stir welding (FSW). Research…

Experimental measurements and finite element modelling were undertaken to investigate the deposition of AA1050 commercially pure aluminium layers on AA 2024-T351 aluminium alloy substrates by friction surface cladding (FSC). Experiments were perform…

With the aim of overcoming the thickness limitations of conventional friction stir welding (FSW), a multilayer multirun FSW process was developed in which six layers of ASTM A516 G70 (0.18%C, 1.1%Mn, 0.08%Cr, 0.16%Ni, 0.04%Mo, 0.02%Ti, 0.03%Al, 0.32…

The floating bobbin friction stir welding (FSW) technique was employed to develop high performance aluminium floor slabs for road bridges and experiments were undertaken to investigate the influence of heat input on fracture location. Butt joints we…

Al, 50%Si alloys were joined by friction stir welding (FSW) on spray deposited sheets (thickness 1.5 mm) for butt welding and powder metallurgy plates (thickness 10 mm) for surface welding and the welded joint surface quality and microstructure were…

An investigation is presented into the occurrence of a grey line in x-ray diffraction of friction stir welded joints of AA 2024-T62 aluminium alloys, and its influence on mechanical and fatigue properties. Welding in 2 mm sheet was performed using a…

A detailed experimental and theoretical investigation was made of the use of friction stir welding (FSP) to modify the microstructure of magnesium AM50 die castings. Rectangular die cast plates of 3 mm thickness of AM50 (Mg, 4.9%Al, 0.39%Mn) were su…

The velocity field in the shear layer surrounding the tool/matrix interface in friction stir welding (FSW) was used to characterise material flow and was investigated by x-ray/computational tomography (CT) marker material experiments as well as anal…

An investigation is presented into the fabrication of welded joints in high strength aluminium alloys by friction stir welding (FSW) and into the application of the technology for manufacturing lightweight aircraft structures. The materials consider…

An investigation was undertaken to identify the main factors influencing abnormal grain growth behaviour during post weld solution heat treatment of 2219-O aluminium alloy (Al, 5.8-6.8%Cu) friction stir welded (FSW) joints. Sheet specimens (thicknes…

The use of semi-friction stir processing to improve the facing surface layer of flange joints in casings of high-voltage switchgears, filled with electro-insulating SF6 gas, was examined. The influence of tool shape and size, and welding parameters …