TWI Digital Library

Neural-fuzzy modelling techniques were employed to develop a transparent model-based approach that creates linguistic indices directly from spectral-temporal FSW (friction stir welding) data in order to analyse the relationship between process param…

A computational fluid dynamics package, FLUENT, was used to model the viscous material flow during friction stir welding using two- and three-dimensional tool shapes. Two approaches were used to describe the viscosity. The first approach interpolate…

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…

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…

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…

Single run friction stir welding (FSW) experiments were undertaken on plate specimens (thickness 6 mm) of 7A60-T6 aluminium alloys (Al, 8.89%Zn, 2.74%Mg, 2.26%Cu) and the relationship between process parameters, microstructure and mechanical propert…

An experimental study was carried out to investigate the link between the microstructure and the mechanical and corrosion properties for a friction stir welded aerospace aluminium alloy 7349-T6 (Al, 1.4-2.1%Cu, 1.8-2.7%Mg, 7.5-8.7%Zn) developed for …

The principles are presented of stationary shoulder friction stir welding (FSW) with examples of the weld microstructures that can be achieved. Trials were conducted on 6.35 mm plate of Ti-6%Al-4%V titanium alloy, with spindle speed of 400 rpm and t…

A series of friction stir welding (FSW) experiments using threaded tool pins and AA5083 (Al, 4.5%Mg, 0.6%Mn) or A356 (Al, 7%Si, 0.3%Mg) workpiece alloys was undertaken in order to understand material flow mode within thread spaces and its influence …

Two friction stir welding (FSW) procedures, a sacrificial anvil method and a hybrid FSW/arc welding technique, were developed to assure consistent full penetration welds during the construction of offshore and onshore pipelines, respectively. The of…

The modification of a thermally sprayed cemented layer of WC-CrC-Ni (WC-20%CrC-7%Ni) and WC-Co (WC-12%Co) using friction stir processing (FSP) was investigated. Layers of WC-CrC-Ni and WC-Co were sprayed onto SKD61 substrate (17 mm thickness) by HVO…

A finite element model based on a staggered thermo-fluid solution scheme was employed to investigate flow around friction stir welding (FSW) tools, "MORFEO" code simulations were undertaken to predict flow patterns and temperature distribution in th…

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) was employed to join ultra fine grained C-Mn steel (0.14%C, 0.2%Si, 1.84%Mn) sheets of 5 mm thickness using a polycrystalline cubic boron nitride tool, and the metallurgical and mechanical properties of the joint were eva…

An experimental investigation was conducted into the effects of friction stir processing (FSP) and post-FSP ageing on the microstructure and mechanical properties of Alloy 718 castings. Bead-on-plate welds were fabricated on cast Alloy 718 sheets (t…

A coupled model, comprising a computational fluid dynamic process model, a precipitate evolution model based on classical phase transformation theory and a classical strengthening model, was formulated to investigate the effect of process parameters…

Friction stir welding was employed to fabricate joints in aluminium and magnesium alloys, and the weld zone microstructure and plastic deformation behaviour were investigated. The materials tested were AA 5454-H22 (Al, 2.85%Mg) wrought alloy sheets …

A multi-physics model for thermal simulation of bobbin-tool friction stir welding was developed assuming a partially sticking condition at the tool-matrix interface, and simulation results were compared with experimental data for welding of AA7449 a…

Friction stir welding (FSW) experiments were performed to join two dissimilar aluminium alloys, AA-7075 (Al, 5.58%Zn, 2.48%Mg, 1.38%Cu) and AA-2024 (Al, 4.5%Cu, 1.36%Mg), in a butt configuration, and the microstructural and hardness characteristics …

The material point method based on NairnMPM software was employed to formulate a 2D model of elastoplastic material flow around a friction stir welding (FSW) tool probe and to examine 2D elastoplastic deformation and the frictional interaction at th…