TWI Digital Library

A friction stir spot welding process was employed to fabricate dissimilar joints between 6016 aluminium alloy (Al, 1-1.5%Si, 0.25-0.6%Mg) and galvanised HSLA 280 phosphorus-hardened cold rolled steel (0.08%C, 1.3%Mn, 0.1%Ti, 0.08%Al, 0.09%P), and th…

With regard to the development of friction stir welding (FSW) processes for joining large thin walled 3D structures in aircraft fuselage applications, an investigation is presented into the "LuFo IV" machine concept, incorporating clamping, position…

Friction stir spot welding (FSSW) experiments were undertaken on sheet specimens (thickness 1.3 mm) of AZ31 magnesium alloy (Mg, 3%Al, 1%Zn) and the effects of process conditions and workpiece surface condition on the macrostructure, microtexture an…

Advances in low cost, rapidly re-configurable fixturing and support tooling for the production of complex curvature parts by friction stir welding are described. An Intelligent Friction Stir Welding (IFSW) path planning algorithm developed by the So…

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…

The influence of tool geometry and process conditions on the lap shear strength, weld integrity and efficiency during friction stir spot welding of magnesium alloys for automotive applications was investigated. The macro- and microstructures and wel…

High-strength aluminum alloys of the AA7xxx-series are increasingly used in demanding environments owing to their excellent strength-to-weight-ratio. The strengthening mechanism of these alloys is dependent on the precipitation of hardening particle…

A Granular Computing (GrC) Neural-Fuzzy (NF) modelling approach that can learn relational data descriptions from a minimum number of experimental data is proposed for finding optimal process operating windows in friction stir welding (FSW). Research…

Experimental measurements and finite element modelling were undertaken to investigate the deposition of AA1050 commercially pure aluminium layers on AA 2024-T351 aluminium alloy substrates by friction surface cladding (FSC). Experiments were perform…

With the aim of overcoming the thickness limitations of conventional friction stir welding (FSW), a multilayer multirun FSW process was developed in which six layers of ASTM A516 G70 (0.18%C, 1.1%Mn, 0.08%Cr, 0.16%Ni, 0.04%Mo, 0.02%Ti, 0.03%Al, 0.32…

The floating bobbin friction stir welding (FSW) technique was employed to develop high performance aluminium floor slabs for road bridges and experiments were undertaken to investigate the influence of heat input on fracture location. Butt joints we…

Al, 50%Si alloys were joined by friction stir welding (FSW) on spray deposited sheets (thickness 1.5 mm) for butt welding and powder metallurgy plates (thickness 10 mm) for surface welding and the welded joint surface quality and microstructure were…

An investigation is presented into the occurrence of a grey line in x-ray diffraction of friction stir welded joints of AA 2024-T62 aluminium alloys, and its influence on mechanical and fatigue properties. Welding in 2 mm sheet was performed using a…

A detailed experimental and theoretical investigation was made of the use of friction stir welding (FSP) to modify the microstructure of magnesium AM50 die castings. Rectangular die cast plates of 3 mm thickness of AM50 (Mg, 4.9%Al, 0.39%Mn) were su…

The velocity field in the shear layer surrounding the tool/matrix interface in friction stir welding (FSW) was used to characterise material flow and was investigated by x-ray/computational tomography (CT) marker material experiments as well as anal…