TWI Digital Library

A description is presented of the development of an aircraft adapter pallet system for the rapid deployment of supplies and equipment for use by the US Army. The pallets consisted of seven lightweight AA-6005A aluminium alloy (Al, 0.4-0.7%Mg, 0.5-0.…

Forces experienced by the pin and the workpiece during friction stir welding were measured and used to design a friction stir welding machine which would accept a curved workpiece fed through the machine by hand. Forces in three perpendicular direct…

High alloy tool steel H13, silicon nitride(Si3N4) and tungsten carbide (WC) bonded with 10%Co cylindrical pin tools (12.5 mm diameter) were evaluated for the friction stir welding of aluminium alloy 6061 containing 20 wt% alumina by determining an e…

Friction stir welding (FSW) was carried out on A-6N01-T5 aluminium alloy of thickness 15 mm in various restraint conditions, and the amount of deformation before and after welding was investigated. Vertical distortion and lateral shrinkage of the we…

The joint strength of friction stir welded extruded and T6 tempered sections of 6000 series aluminium alloys (JIS 6N01, 6061, 60663 and 6082), thickness 12-20 mm, was investigated. Friction stir welding (FSW) parameters are given for one-pass and tw…

Friction stir welding of aluminium alloy JIS-6N01-T5 (Al, 0.4-0.8%Mg, 0.4-0.9%Si) was investigated for subway [underground railway] rolling stock applications by comparing the welded joint properties with those of MIG and laser welded joints. Sheet …

Welding trials are reported to demonstrate joint formation between S45C mild steel and aluminium alloy 6063 using a friction stir diffusion process. Welding experiments were undertaken using a machining centre with a cemented carbide rotating tool, …

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…

A direct modelling approach ("SAMCEF" software finite element simulation) coupled with an inverse model, based on genetic algorithm optimisation (MAX software), was applied to the friction stir welding (FSW) process for two aluminium alloys (6005A-T…

Thermomechanical and microstructural modelling were performed for the friction stir welding process, simulating the thermal diffusion during and after welding (in the cooling stage), and comparing the results with experimental data obtained for fric…

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 relationship between microstructure and hardness was investigated in friction stir welded aluminium alloy 6063-T5. The alloy thickness was 6 mm. Hardness profiles were measured across the stir zone. The microstructure of the as-welded and postwe…

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…

The development of orbital friction stir welding (FSW) technology for joining aluminium pipes for gas insulated power transmission lines (GIL) is described. The equipment is outlined: hydraulic unit, control panel, FSW head with steel wire rope and …

The influence of the process parameters on the microstructure, mechanical properties and corrosion of friction stir welded aluminium alloy 2024-T3 was investigated. Sheets of 1.6 and 4 mm thickness were welded using rotational speeds of 800-2400 rpm…

An investigation was undertaken into the development and wear performance of friction stir welding (FSW) tools made from precipitation strengthened Ir-containing nickel-based superalloys (Ni, 25%Ir, 14%W, 4%Al) during FSW of Ti, 6%Al, 4%V alloys. Th…

A report is presented into the challenges faced when developing thermal, thermomechanical and flow models of the friction stir welding process, such as the evolution of predictive models, a method to find the correct contact state variable, and the …

A control concept for friction stir welding (FSW) of structural steels was developed based on a closed loop architecture that limits the heat input during the welding process according to the continuously monitored value of the magnetic permeability…

Thermodynamic modelling and experimental measurements were employed to investigate the influence of intermetallic compound formation on the shear strength of dissimilar joints between an aluminium alloy and ultra-high strength steel fabricated by fr…

A report is presented into the friction stir welding (FSW) fabrication of an aluminium deck for a pedestrian bridge over the Petite Decharge river (Alma, Quebec, Canada), incorporating the design and manufacturing of extrusions, FSW tools and a syst…