TWI Digital Library

Friction stir welding experiments using a W-Re pin tool were undertaken on thermohydrogen processed Ti, 6-6.2%Al, 4.15-4.18%V, 0-0.5%H alloys to investigate the effect of hydrogen content on weldability, and the welded joint morphology, microstructu…

Friction stir welding (FSW) was employed to join various aerospace aluminium alloys, the welded joints were characterised with respect to microstructure, mechanical properties and corrosion resistance, and the effects of post-weld artificial ageing …

A description is presented of the process flow of a production job based on friction stir welding (FSW) for the serial production of aluminium drying trays for the food industry. FSW joint quality issues (joint impermeability, weld surface quality a…

The weldability of 2 mm thickness thixomoulded sheets of AZ91D magnesium alloy by friction stir welding (FSW) was studied as a function of tool rotation speed (880-1750 rpm) and specimen travel speed (50-500 mm/min). The composition of the sheet was…

Liquid metal dealloying is a promising method relying on the selective dissolution of a component from a precursor alloy into a liquid metal, resulting in production of bicontinuous porous surface on the precursor alloy. To expand use of the porous …

An investigation is presented into the use of a friction stir welding/forging process to fabricate tee and I-beam shapes with integral radial shaped fillets, the optimisation of process parameters for different alloys and shapes, and the results of …

Friction stir welding (FSW) experiments were undertaken on sheet specimens (thickness 5 mm) of 5454-H111 aluminium alloys and the relationships between process forces, spindle power and tool geometry were investigated. Twelve FSW tools with specifie…

With regard to the development of dissimilar aluminium-steel joint fabrication for automotive applications such as body-in-white, an investigation incorporating experiment and numerical simulation was undertaken to examine the dissimilar friction st…

Friction stir welding (FSW) experiments were undertaken to investigate the feasibility of joining a metal matrix composite (MMC), comprising an AA 2124 matrix and 25 vol.% SiC particles, to itself and to a monolithic alloy (AA 2024-T3), and the micr…

Following an overview of friction stir spot welding (FSSW) for potential automotive applications (including robotic FSSW in poke welding and C-frame configurations, and pedestal FSSW machines for manual, automatic or robotic use), a FSSW process dev…

Friction stir welding of DH-36 mild steel sheet was evaluated for shipbuilding applications. Butt welds were prepared in sheet of 4.6 mm (0.18 in) thickness using an unthreaded tool (W, 25%Re) rotating at 400 or 500 rpm and travelling at 203 mm/min …

Fatigue tests were performed using lap-shear specimens of friction stir spot welded Al, 0.8%Mg, 1%Si alloys. Sheet specimens (thickness 2 mm) were subjected to PWHT of solution treatment and/or ageing. Weld zone microstructure was observed by SEM. F…

The joining of hot rolled aerospace quality AZ31B-H24 magnesium alloy (Mg, 2.5-3.5%Al, 0.7-1.3%Zn, 0.2-1.0%Mn) sheets (thickness 4.95 mm) was investigated using an MTS ISTIR friction stir welding (FSW) machine, the quality of the butt joints produce…

The design, construction and use of a purpose-built friction stir welding machine for the welding of 15.9 mm (0.625 in) thickness, 1.88 m (74 in) long aluminium alloy 6061-T6 plate and extruded sections to form the side panels of a laser system is d…

The application of friction stir welding (FSW) to the fabrication of copper backing plates of thickness 6 mm was investigated. The welding conditions, FSW machine development, and mechanical and metallurgical properties of friction stir welded joint…

Friction stir welded and TIG welded butt joints in aluminium alloy 6061 matrix B4C-reinforced (15-30% B4C) composites were compared. TIG welds were produced using a combination of aluminium alloys 4043 and 4047 as filler metal with pure Ar or a mixe…

A friction stir welding (FSW) procedure using a W-Re alloy tool, magnetic welding fixture and a high-speed steel backing bar was developed for application to precipitation-hardened martensitic stainless steel (13.7%Cr, 7.1%Ni) thin sheet (thickness …

With regard to the development of 9%Ni steels for cryogenic applications, an investigation was undertaken into the metallurgical weldability of ASTM A553 Type I steel (0.08%C, 0.73%Mn, 9.4%Ni) joined by double-sided two-run friction stir welding (FS…

A slide style presentation giving a market review of FSW, challenges for FSW users and process enhancements. The development of equipment and methods for floating bobbin tool FSW and stationary shoulder friction stir welding is outlined. Lifetimes o…

Similar and dissimilar friction stir welds (FSW) were performed between 2014-T6 and 6061-T6 aluminium alloy sheet (4.70 mm thickness). Weld speed of 450 and 90 mm per minute were used to produce welds described as cold and hot welds respectively. Ad…