TWI Digital Library

An investigation was made of approaches to tool design for the self reacting pin tool (SRPT) (bobbin tool) to mitigate the effects of friction stir welding owing to enlarged grains that occur in large structural extrusions, in order to yield accepta…

A review is presented of FSW (friction stir welding) tool design parameters and their relationship with heat generation, material flow and weld quality, including discussions of interaction mechanisms between tool and specimen, typical tool designs,…

An investigation was undertaken to examine the effect of adding aluminium to magnesium on the strength of dissimilar joints between steel and magnesium fabricated by friction stir welding. The materials studied were pure 3N magnesium, AZ31 (Mg, 2.9%…

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…

The influence of tool and plate positions on the friction stir welding of F82H ferritic/martensitic steel (0.1%C, 8%Cr, 2%W, 0.2%V, 0.04%Ta) and austenitic stainless steels 304 and 316 was investigated. Stainless steel compositions were: 304 (0.08%C…

Friction stir welding (FSW) was carried out on A-6N01-T5 aluminium alloy of thickness 15 mm in various restraint conditions, and the amount of deformation before and after welding was investigated. Vertical distortion and lateral shrinkage of the we…

Analytical modelling and experimental measurements were undertaken to investigate a dual-loop temperature control algorithm for friction stir processing, incorporating an inner loop to maintain constant power and an outer loop to set the power based…

Friction stir processing (FSP) was employed to fabricate oxide dispersion strengthened copper composites and the microstructure and mechanical properties of the materials were investigated in order to clarify the effect of process parameters on mate…

In order to develop a method for microjoining by friction stir welding (FSW), micro-FSW trials were conducted on Mg alloy AZ31 (2.97%Al, 0.83%Zn) thin sheets (0.4 mm thickness), and the welding performance was assessed. The micro-FSW system incorpor…

A review of an experimental study of friction stir welded (FSW) 5456-H1 16 aluminium plate of 19 mm thickness, is presented and the formation of a pre-rotation defect and its effect on the mechanical properties of welds is discussed. Welds were made…

A device was designed and manufactured to facilitate accurate monitoring of forces, torque and tool temperature during friction stir welding (FSW) and for use as a weld quality indicator in relation to issues such as tool wear, lack of tool penetrat…

A simultaneous double sided corner Ad-Stir fillet stationary shoulder friction stir welding (SSFSW) process was developed for LNG (liquefied natural gas) storage tank construction. The microstructure and mechanical properties of welded joints were i…

An investigation was carried out in order to examine the feasibility of producing friction stir welded FSW T-joints using the corner fillet geometry. A specific tool comprising a rotating pin (made of MP159) with a 45 degree inclination to the two p…

Friction stir welding tool developments to enhance the range of process applications, welding speed and quality are described. The scroll shoulder tool has a shoulder profile which moves surface material towards the probe. It improves surface qualit…

Dissimilar butt joints were fabricated between two aluminium alloys, 2017A-T451 (Al, 4.14%Cu, 0.72%Mg) and AlSi9Mg (Al, 8.6%Si, 0.31%Mg), by friction stir welding (FSW) using a dual-speed tool and their microstructure and mechanical properties were …

The relationship between microstructure and hardness was investigated in friction stir welded aluminium alloy 6063-T5. The alloy thickness was 6 mm. Hardness profiles were measured across the stir zone. The microstructure of the as-welded and postwe…

A discussion is presented on the development of a FSW process for the welding of thin gauge aluminium alloy lap joints in the fuselage and wing sections of the Eclipse 500 twin-engine jet aircraft. The issues of pin tool geometry for use on lap join…

In this study, RFSSW of similar 5052-0 and 6061-T6 aluminum alloys with various thickness from 1.0 mm to 3.0 mm were performed by using cemented carbide tools. Microstructural features and mechanical properties of the joints produced with optimized …

Artificial intelligence (Al) and machine learning (ML) are major drivers for improving quality of manufacturing process including Friction Stir welding. The specific parameter that has 100% effect on the quality of FSW has not yet been identified, h…

Dissimilar lap joints between ASTM A36 low carbon steel and Inconel 625 (Ni, 21.4%Cr, 9.65%Mo, 3.2%Nb, 2.6%Fe) were fabricated by friction stir welding (FSW) and the effects of process parameters on microstructure and hardness were investigated. FSW…