TWI Digital Library

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…

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…

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…

The material flow of aluminium alloy and steel during dissimilar friction stir spot welding was visualised using zinc tracers and the surface temperature of the flat-tipped tool during stirring was measured by telemetry. Welds were produced in AA505…

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 …

Thermocouples were mounted in a friction stir welding (FSW) tool to measure its temperature during the FSW of aluminium alloy 6061-T6 (Al, 1.0%Mg, 0.61%Si, 0.27%Cu, 0.10%Mn) sheet of 3 mm thickness. Type K thermocouples were mounted at various dista…

Friction stir welds in S355 carbon manganese steel plate of 12 mm thickness were characterised by microstructural studies and measurements of mechanical properties. A tungsten-rhenium alloy tool with a pin length of 7.5 mm was used, running at 400 r…

3rd International Symposium, 27-28 Sep 2001, Poster Session, Paper 13

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 material flow and microstructural evolution during friction stir processing of A356 cast alloy (Al, 7%Si, 0.3%Mg, 6.4 mm thickness) using tools of H13 tool steel were investigated. The deformation and microstructure in the stir zone were studied…

The material flow in dissimilar material friction stir welding (FSW) between AA 6063 alloy (Al, 0.5%Mg, 0.43%Si) and S45C carbon steel (0.43%C, 0.25%Si, 0.77%Mn) was investigated by determining the 3D forces acting on the welded joint and the intern…

Based on the detailed analysis of the microstructure on top surface of friction stir welded (FSW) joint of 2024 aluminum alloy by optical microscope, XRD and transmission electron microscope. SEM was employed to obtain the in-situ corrosion developm…

An investigation was undertaken to evaluate the separation forces exerted by the tool on the fixture compared to the weld process loads generated during butt welding of self reacting bobbin friction stir welds. Two tempers of an aluminium alloy were…

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…

A thermal numerical 3D model to predict temperature and machine torque values for bobbin tool friction stir welding (FSW) is presented. The model includes a 3D representation of the work piece, clamping and bobbin tool. The heat transported by the 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…