TWI Digital Library

Friction stir welding (FSW) experiments were undertaken on 4142 low alloy and S7 tool steels as well as dissimilar steel combinations and the microstructure and mechanical properties of the welded joints were investigated. FSW was conducted using an…

Friction stir welding (FSW) experiments were performed on 6005A-T6 (Al, 0.49%Mg, 0.61%Si) alloy plates (thickness 6 mm) using a fully instrumented CNC milling machine, and the microstructure and mechanical properties of the welded joints were invest…

Based on a friction model incorporating the dynamic coupling between friction and material flow in heat transfer and fluid flow models, a computational fluid dynamics (CFD) methodology was employed to study material flow during friction stir welding…

In relation to the requirement for automatic inspection of weld quality during the friction stir welding (FSW) process, the "MonStir" process monitoring system was developed to analyse measured process forces and their frequency spectra, and an inve…

The friction stir spot welding of automotive aluminium alloy and Zn-coated steel was investigated. Welds were made in 6000 series AlMgSi alloys (1.2 mm thickness) and galvanised steel (1.1 mm thickness) using a multi-step friction stir spot process.…

As part of a study investigating FSW as a method for joining the lids on copper canisters for the long term storage of nuclear waste, the development of microstructure and heat flow during the FSW process was experimentally investigated. The microst…

Friction stir welding experiments were undertaken on 2195-T8 (Al, 3.99%Cu, 1.09%Li) alloy sheets (thickness 5 mm) and the weldability, microstructure and mechanical properties of the fabricated butt joints were investigated. Welding was performed us…

An experimental investigation was undertaken to examine how tool pin induced material flow and intermetallic growth conditions affect the formation of discontinuity during friction stir lap welding of dissimilar Al-Cu joints. The materials comprised…

Three recently published finite element studies, modelling friction stir welding (FSW) of different aluminium alloys, were reproduced using ABAQUS software and the results were comparatively assessed. The models considered were as follows: heat tran…

The tensile and bend properties of friction stir welded butt joints in aluminium alloys 2024-T3, 6013-T6 and 7475-T76 were determined, including welds in 2024 and 7475 subjected to PWHT. The ultimate tensile strength, proof stress at 0.2% strain, an…

The fine scale precipitation in the nugget zone and in the HAZ of a weld in aluminium alloy AA-6082 (Al, 0.7%Mg, 0.5%Mn, 0.9%Si) of thickness 5-10 mm made by friction stir welding (FSW) was examined using transmission electron microscopy. The dissol…

Local stress-strain curves were determined from an array of spherical indents on the cross-section of the joint of a friction stir welded (FSW) high strength aluminium alloy AA 2198 sheet, in order to characterise the mechanical properties of differ…

Friction stir butt welding experiments were conducted on S45C medium carbon steel sheets (thickness 1.5 mm) under various conditions and the microstructure and mechanical properties of the welded joints were investigated. Single run butt welding was…

A feasibility study is presented for the joining of mild steel plates (0.2%C, 0.11%Si, 0.63%Mn) of 12 mm in thickness by friction stir welding (FSW). Process optimisation using a combination of operating parameters and tool geometries is discussed, …

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…

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 (FSW) experiments were undertaken on Invar 36 alloy (Fe,36%Ni) sheet specimens (thickness 3 mm) and the microstructure evolution and recrystallisation mechanism were investigated. Bead-on-plate FSW was performed using a polycry…

Dissimilar joints between wrought 5083 and 6111 aluminium alloys and between AZ31 magnesium alloy and 6111 were fabricated by friction stir welding and their microstructure and mechanical properties were investigated. The starting materials were 508…

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 …