TWI Digital Library

A plastic replication technique was employed to investigate surface crack initiation and growth in 2024-T351 Al alloy friction stir welded (FSW) joints during fatigue bending tests. Fatigue failure mechanisms were examined, and a modified Hobson-Bro…

The effects of pre and post weld heat treatments on the strength, fracture toughness and fatigue crack propagation of welds made by friction stir welding (FSW) in aluminium alloy 6013-T6 sheet material, which may replace the 2024-T3 skin alloy for f…

Al, 50%Si alloys were joined by friction stir welding (FSW) on spray deposited sheets (thickness 1.5 mm) for butt welding and powder metallurgy plates (thickness 10 mm) for surface welding and the welded joint surface quality and microstructure were…

AA 2219 aluminium alloy sheets (thickness 2.5 mm) were joined by friction stir welding (FSW) and an investigation was undertaken into the relationship between joint mechanical properties, the torque generated by the spindle motor and process variabl…

Friction stir welding (FSW) experiments were performed on Al-based alloys prepared by direct-chill casting and continuous casting, and the influence of intermetallic particles and process parameters on onion ring zone morphology and microstructure w…

The influence of joining parameters on the microstructure, intermetallics, hardness, shear properties and tensile strength of dissimilar friction stir welds between AA1050 aluminium alloy and hot-stamped boron steels was investigated. Overlap welds …

Following an overview of initial work on friction stir welding (FSW) of titanium alloys, developments in the stationary shoulder FSW (SSFSW) technique are described, highlighting the potential of the SSFSW approach to increase welding speed (up to 2…

Friction stir welding (FSW) was applied to the magnesium alloy AZ91 (Mg, 8.21%Al, 0.64%Zn), optimum welding parameters were derived, structural and mechanical properties of the weld zone were determined, and the influence of microstructure on weld p…

The use of friction stir welding to produce aluminium alloy tailor welded blanks for automotive applications was investigated by measuring the hardness and microstructure of friction stir welds in aluminium alloy 5052 (Al, 2.46%Mg, 0.24%Fe, 0.15%Cr,…

The stationary shoulder technique was applied to the self reacting pin tool (SRPT) for friction stir welding (FSW) of high quality aluminium alloy railway car body structures in order to enhance the appearance of no coating side structures construct…

A method was developed to integrate basic force control functionalities into a CNC milling machine for friction stir welding (FSW) by using a standard CNC controller, optimum control parameters for various FSW conditions were identified and the forc…

With regard to the development of a hybrid structure tool holder to facilitate chatter vibration suppression in metal cutting processes, an investigation was undertaken into the use of friction stir girth welding (FSGW) to fabricate dissimilar joint…

An investigation was undertaken to examine the effects of high welding speed and the use of thermal boundary conditions during friction stir welding (FSW) on the mechanical properties of AA 7050 aluminium alloy weldments. FSW experiments were perfor…

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)…

In order to study the relationship between material flow and the development of highly variant process forces during friction stir welding (FSW), a high sampling rate triaxial force measurement device and a high speed camera were employed to monitor…

With regard to the development of friction stir shaping as a modified friction stir welding (FSW) process to maximise material flow within the weld zone and redistribute it into new shapes or features outside of or on top of the weld zone, an invest…

Friction stir welding experiments between AA 6063 aluminium alloy and S45C carbon steel (thickness 6 mm) were performed, and the effects of heat input on the butt joint macrostructure (cavities formed at weld interface), hardness and plastic flow of…

An investigation is presented into the development of the stationary shoulder self-reacting pin tool (SSSRPT) as a friction stir welding variant and the application of the tool to fabrication of butt joints in sheets (thickness 4 mm) of A6N01 alloys…

Results are presented from tests carried out to determine the mechanical and corrosion properties of friction stir welds in sheets of thickness 4 mm of two aerospace aluminium alloys AA-6056 and AA-6013. The specimens included alloys in the T6 condi…

Lap joints were fabricated in AA 7075-T6 aluminium alloy sheets (thickness 2 mm) using an ESAB "Rosio" friction stir welding (FSW) robot and the effect tool of side-tilt angle on welded joint tensile strength was investigated. A "CounterStir" FSW to…