TWI Digital Library

Full field displacement measurement with digital image correlation was used to study the mechanical properties of friction stir welded joints in aluminium alloy plates. Welds were made in 5454-O and 5454-H sheet of 3.9 mm thickness, and 2195-T8 plat…

Friction stir spot welding (FSSW) was employed to fabricate dissimilar lap joints between a 6000 series aluminium alloy (Al, 1%Si, 0.5%Mg) in the T4 condition and SPCC mild steel (0.05%C, 0.01%Si, 0.14%Mn) without formation of intermetallic compound…

The stationary shoulder technique was applied to the self reacting pin tool (SRPT) for friction stir welding (FSW) of high quality aluminium alloy railway car body structures in order to enhance the appearance of no coating side structures construct…

The influence of joining parameters on the microstructure, intermetallics, hardness, shear properties and tensile strength of dissimilar friction stir welds between AA1050 aluminium alloy and hot-stamped boron steels was investigated. Overlap welds …

The aim of this investigation was to study morphological, mechanical and microstructural properties of similar and dissimilar friction stir welds in 1 mm thick sheets of phosphorous-­deoxidised copper and 5083-H111 aluminium alloy. At the weldin…

The development of friction stir welding (FSW) as a potential low distortion, cost-effective joining method for HSLA-65 steel T-joints is presented with reference to application in the ship building industry. Experiments were carried out on steel (0…

Analytical modelling and experimental measurements were undertaken to investigate a dual-loop temperature control algorithm for friction stir processing, incorporating an inner loop to maintain constant power and an outer loop to set the power based…

The influence of tool and plate positions on the friction stir welding of F82H ferritic/martensitic steel (0.1%C, 8%Cr, 2%W, 0.2%V, 0.04%Ta) and austenitic stainless steels 304 and 316 was investigated. Stainless steel compositions were: 304 (0.08%C…

Dissimilar lap joints between ASTM A36 low carbon steel and Inconel 625 (Ni, 21.4%Cr, 9.65%Mo, 3.2%Nb, 2.6%Fe) were fabricated by friction stir welding (FSW) and the effects of process parameters on microstructure and hardness were investigated. FSW…

A simplified friction stir welding (FSW) tool equipped with an adjustable probe was developed, FSW trial results with prototype tools were obtained and were analysed in terms of weldability. The simplified tools were realised by devising shoulders f…

Friction stir processing (FSP) was employed to fabricate oxide dispersion strengthened copper composites and the microstructure and mechanical properties of the materials were investigated in order to clarify the effect of process parameters on mate…

Abrasion circle and modified refill friction stir spot welding (FSSW) techniques were employed to fabricate dissimilar joints between 6111-T4 (Al, 0.75%Mg, 0.69%Si, 0.75%Cu) and AZ31 (Mg, 3%Al, 1%Zn, 0.5%Mn) alloy sheets (thickness 0.9 mm) with the …

The development of three-dimensional column-type friction stir welding (FSW) equipment for robotic FSW of joints with complex shapes is described. The process requires a large force and precision control for tool penetration. The specification of th…

An ultrasound assisted friction stir welding (UA-FSW) technique was employed to fabricate butt joints in similar Al/Al and dissimilar Al/Mg sheets, and the influence of ultrasonic oscillations on weld zone microstructure and mechanical properties wa…

Ultrasonic immersion or laser ultrasonics combined with the synthetic aperture focusing technique (SAFT) and a pulsed eddy current technique were evaluated as NDE methods for the detection of defects specific to friction stir welding (FSW). Measurem…

In relation to the implementation of friction stir welding (FSW) for stringer-skin type lap joint fabrication in aeronautical applications, an investigation is presented into the overlap welding of an extruded profile AA 7050-T7651 aluminium alloy s…

To investigate the potential of mechanical tensioning (MT) to reduce residual stresses in friction stir welding (FSW), thereby eliminating buckling, FSW was performed on 2024-T351 aluminium alloy (thickness 3.2 mm) with different tensile stress leve…

A mobile friction stir welding (FSW) machine, comprising a self-contained truck with four wheels, was proposed for use when welding large structural members made from aluminium alloys and the concept was verified by welding trials using a prototype …

Dissimilar lap joints between aluminium alloys and various steel grades were fabricated by friction stir welding (FSW), FSW tool wear was measured and a phenomenological law was developed with respect to pin length reduction over weld length to repr…

The feasibility of using friction stir welding (FSW) in the construction of an aircraft central wing box from butt-welded extrusions was evaluated. An FSW procedure for welding 7055 T77511 and 7349 T6511 10 mm thickness extrusions was developed by T…