TWI Digital Library

Experimental investigations were undertaken to determine the way in which process parameters in friction stir welding (FSW) affect the distribution and quantity of embedded oxide particles in the weld zone and to elucidate the influence of such part…

With regard to heavy vehicle component applications, friction stir welding (FSW) and refill friction stir spot welding were employed to fabricate 5083 aluminium multisheet packs for superplastic forming (SPF) into 3D structural or integrally stiffen…

The influence of welding tool design on the microstructure of the interface and friction stir spot welded joint between aluminium alloy and low carbon steel was investigated. Two types of welding tool were evaluated: a tool comprising a probe and sh…

A friction stir channelling process to promote a distinct material flow was developed, in which a controlled amount of viscoplasticised material from the metal workpiece flows out from the processed zone producing an internal channel without any gap…

Similar and dissimilar T-joints were made by friction stir welding (FSW) of 3 mm thickness 2024-T3 cover sheet combined with 2.5 mm thick stiffeners consisting of either 2024-T3 or 2098-T8 (stringer) material. During welding the pin penetrated the s…

An arbitrary Lagrangian Eulerian (ALE) formulation was developed to simulate the plunge, dwell and welding stages of the friction stir welding process using "FORGE3" finite element software, and the friction coefficients from a viscoplastic law were…

Microstructure observations and bending tests were employed to investigate the basal plane texture and room temperature formability of AZ31 magnesium alloy rolled and extruded sheets (thickness 3 mm) treated by friction stir processing (FSP). Overla…

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…

An investigation was undertaken to explore the feasibility of welding baseline aerospace aluminium alloys along with additional constituents, such as coatings and a faying surface sealant, by the refill friction stir spot welding (RFSSW) technique a…

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…

Incorporation of friction stir welding (FSW) in a parallel kinematics machine (PKM) 5-axis machine was undertaken with the intelligent computer aided manufacturing (ICAM) approach to optimise process parameters and tool paths by using available CNC …

Spot welds were fabricated in DC01 mild steel and HC 420-LA high strength steel sheets (thickness 1 mm) by friction stir spot welding (FSSW) using various pinless tools and process parameters, and thermographic analysis together with microstructural…

Friction stir welding (FSW) experiments were undertaken on single crystal and polycrystalline pure iron sheets (thickness 1.5 mm) as well as a polycrystalline carbon steel, and the microstructure, material flow characteristics and plastic deformatio…

A report is presented into the friction stir welding (FSW) fabrication of an aluminium deck for a pedestrian bridge over the Petite Decharge river (Alma, Quebec, Canada), incorporating the design and manufacturing of extrusions, FSW tools and a syst…

Ni3Al/Ni3V dual two-phase intermetallic alloys, incorporating Ta and Re additions, with enhanced high-temperature strength and hardness, were developed for friction stir welding tool applications and applied to fabricate butt welds in SUS 430 steel …

Use of friction stir welding (FSW) to replace mechanical fastening in fabrication of an aircraft component in the ROCT Project (Rib One with Crux and Tees) is described. Design is shown of the part, which was assembled using four butt welds from wro…

Dissimilar joints between 2017A-T451 (Al, 4.14%Cu, 0.72%Mg, 0.68%Si) and AlSi9Mg (Al, 8.6%Si, 0.64%Fe, 0.34%Mn, 0.31%Mg) aluminium alloys were fabricated by a friction stir welding process featuring different rates of rotation of the pin and shoulde…

With regard to the occurrence of coarse alpha-Al dendrites, eutectic phase, shrinkage porosity and other defects in cast aluminium alloys, an investigation was undertaken into the influence of different combinations of friction stir processing (FSP)…