TWI Digital Library

To understand the influence of dwell time in friction stir welding (FSW) and thus to optimise its value, spot welds were produced between superposed sheets of 6008 aluminium alloy and industrial steel (thickness 2.5 and 2 mm, respectively), and thei…

The effects of friction stir welding (FSW) on the microstructure, hardness, residual stress state and grain distribution of 2124 Al-SiC composite alloy were investigated. The composite was of AMC225xe aerospace AW2124 alloy reinforced with 25% SiC p…

Friction stir welding experiments were undertaken on butt joints of AA6063 alloys (Al, 0.45-0.9%Mg, 0.2-0.6%Si) and AA6063 matrix reinforced with 6 and 10.5 vol.% B4C, and the effect of particle concentration on welded joint microstructure and micro…

A simplified finite element modelling approach was employed to analyse the effect of localised dynamic cooling on residual stress development during friction stir welding (FSW), and the model predictions were compared with x-ray synchrotron and neut…

Friction stir welding trials, comprising double-sided butt welding of plates of thickness 10-11 mm, were conducted to investigate the weldability of copper and its alloys and to determine the correct process parameters (welding and rotation speeds) …

The effects of friction stir welding (FSW) on the corrosion resistance of aluminium alloys 2014A and 7075, both welded in the peak aged T651 condition, were studied. The effects of postweld heat treatment (retrogression and reageing treatment) were …

An investigation was carried out in order to examine the feasibility of producing friction stir welded FSW T-joints using the corner fillet geometry. A specific tool comprising a rotating pin (made of MP159) with a 45 degree inclination to the two p…

An experimental investigation was undertaken to examine the effect of a TIG welding torch assisted heating source on the microstructure, mechanical properties and fracture mechanism of dissimilar Cu/austenitic stainless steel butt joints fabricated …

Tensile tests, computed tomography and documentation of process forces were employed to investigate the weldability of 1.4310 austenitic stainless steel reinforced extruded AW-6060 alloy (Al, 0.35-0.6%Mg, 0.6%Si) by friction stir welding, and the re…

Following a brief overview of the state of the art and applications for FSW of aluminium and Al alloys, experience and activities with this process at TWI Ltd (UK) are introduced. Principles, advantages and applications are presented of some process…

Friction stir welding experiments were undertaken on carbon manganese steel plates (thickness 6 mm) in order to map the internal temperature distribution, assess the effects of minimal plate preparation and investigate the microstructures and mechan…

Friction stir welding (FSW) experiments were undertaken on AA 5083 aluminium alloys to investigate the influence of process parameters (rotational and travel speeds) and preheating temperature on abnormal grain growth after PWHT. The experimental sp…

The hybrid friction stir channelling (HFSC) technique was employed to produce, in one action, a channel and a joint between dissimilar thickness overlapping Al plates and dissimilar Al-Cu plates, and the microstructural and geometrical features of t…

A man-machine interface for friction stir welding (FSW) was proposed that allows a human operator to augment a traditional control system by monitoring and continuously adjusting the parameters of an established welding programme, and hardware and s…

A study was conducted into a proof of principle for the effectiveness of a neural network in identifying the presence of metallurgical defects and for evaluating tensile strength from the feedback provided during the friction stir welding (FSW) proc…

An experimental investigation was made into the friction stir weldability of MRI 320D magnesium alloy and of hybrid joints between AZ91D and rolled aluminium alloy AA5454. Welding was optimised to perform FSW joints of light metal alloys with a thic…

Friction stir welding (FSW) experiments were conducted on Ti-6%Al-4%V (Ti, 6.32%Al, 4.08%V) and SP-700 (Ti, 4.37%Al, 2.93%V, 1.91%Fe, 1.9%Mo) alloy sheets (thickness 2 mm) in order to investigate the effect of process conditions on joint microstruct…

The StiRoLight Research project (carried out in conjunction with SAAB, ESAB and Volvo) to investigate the use of an industrial robot for friction stir welding of aluminium alloys in the automobile industry, is outlined and studies of path deviations…

The test results are reported for preliminary trials of the feasibility and benefits of applying angular reciprocating (reversal within one revolution) or rotary reversal (reversal after one or more revolutions) motion to the tool during friction st…

Friction stir welding of UK Ministry of Defence Def Stan 95-22 7017 aluminium alloy (Al, 4.5%Zn, 2.0%Mg) armour plate was evaluated by studying the mechanical properties and cracking of welded joints. Initially plate of 10 mm thickness, locally redu…