TWI Digital Library

Lap joints were fabricated in 2024-T3 aluminium alloy sheets (thickness 1 or 0.6 mm) by refill friction stir spot welding (RFSSW) and the influence of tool sleeve depth on joint quality was investigated. Welding was performed at tool depths of 1.1-1…

Butt joints were fabricated in AA 6061-T6511 aluminium alloys by friction stir welding (FSW) and the influence of the welding equipment rigidity on their microstructure and mechanical properties was investigated. The experimental set-up incorporated…

Butt joints were fabricated in a Ruuki Optim 700 MC Plus microalloyed low carbon high strength complex phase steel (0.06%C, 1.79%Mn, 0.01%V, 0.08%Nb, 0.11%Ti) using one-sided and two-sided friction stir welding in order to investigate the difference…

Friction stir processing (FSP) was employed to repair casting defects such as shrinkage cavities and porosity in nickel aluminium bronze, and the corrosion behaviour of the processed material was examined through short-term and long-term testing and…

The microstructural evolution during FSW of beta-annealed plates of Ti-5111 (Ti, 5%Al, 1%Sn, 1%Zr, 1%V, 8%Mo) was investigated above and below the beta transus temperature. Variable penetration tools of a refractory-based material with different dim…

Low temperature friction stir welding (FSW) was employed to join three types of carbon steels and the effects of carbon content, process conditions and phase transformations on the microstructure and mechanical properties of the welded joints were i…

To study the feasibility of SFW (spot stir friction welding) with adhesive, a process that is also called spot friction weld-bonding, aluminium 6111-T4 coupons (25x100 mm, thickness 0.9 and 1.0 mm) were used to produce SFW specimens in a lap shear c…

A phenomenologically based semiphysical modelling approach was employed to develop a process window for friction stir welding (FSW) of AA 2024-T3 aluminium alloy, incorporating simulation of the filling level of the welded joint as a means to determ…

A numerical simulation is presented for the development and integration of a pin tool for friction stir welding (FSW) of aluminium alloys. The Triflute tool design was optimised. The macro- and microstructure of lap joints in A6N01 alloys were studi…

An abrasion circle friction stir spot welding (ABC-FSSW) technique was employed to fabricate dissimilar metal joints between aluminium and steel automotive sheets, and the microstructure, mechanical properties and weld formation mechanisms of the jo…

With regard to inconsistencies in the literature concerning the correlation between friction stir welding (FSW) process inputs and post weld process or material response, an investigation is presented into the primary variables (temperature, cooling…

A friction stir processing (FSP) technique was employed to fabricate D2 steel hunting knife blades with long-life cutting edge retention, and blade integrity tests were undertaken. The FSP tool design was a convex scroll shoulder step spiral and the…

Friction Stir Welding (FSW) is a relatively new technique which utilizes frictional heating combined with a forging pressure to produce virtually defect-free high strength bonds. Although considerable experimental work has been reported in the liter…

Friction stir lap diffusion welding was employed to fabricate dissimilar AA 6060 aluminium alloy/mild steel joints and mechanical testing and metallurgical examination of the weldments were undertaken to investigate the effect of microstructure form…

Similar overlap and dissimilar butt joints were fabricated by friction stir spot joining of AA 6061-T6 (Al, 1-1.1%Mg, 0.66-0.67%Si) and AA 5052-H34 (Al, 2.58%Mg) sheets of thickness 1 and 2 mm, respectively, and microstructural analysis was used to …

An finite element method (FEM) model, considering variables such as tensioning level, heat input and sheet geometry but ignoring mechanical tool effects, was developed to investigate the efficacy of the mechanical tensioning technique for controllin…

A 3D computational fluid dynamics model was developed to conduct numerical simulations of heat generation, material flow and temperature profiles during reverse dual-rotation friction stir welding, a process variant in which the tool pin and the ass…

SiC particle reinforced 2124Al metal matrix composite (MMC) plates (thickness 8 mm) were joined by friction stir welding (FSW) and the relationship between process parameters, weld defect formation and joint mechanical properties was investigated. T…

The microstructures and strengthening mechanisms during friction stir processing (FSP) of AZ91 (Mg, 9%Al, 1%Zn) die-cast and Mg-Y-Zn (Mg, 5.9%Y, 2.6%Zn and Mg, 5.5%Y, 4.3%Zn) cast alloys were investigated and the effect of second phase particle disp…

Numerical simulation of the friction stir welding (FSW) process was undertaken by means of an arbitrary-Lagrangian-Eulerian (ALE) formulation and a fully coupled thermomechanical analysis was performed to account for the heat flux generated by plast…