TWI Digital Library

Process force and discontinuity models were derived to estimate the forces observed in friction stir welding (FSW) in order to develop a method of detecting discontinuities during FSW using physics-based process modelling. FSW welded joints with and…

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…

A temperature monitoring system incorporating thermocouples mounted in the probe and shoulder was employed to measure the temperature of the rotating tool during the fabrication of dissimilar butt joints between A6005C aluminium alloy (Al, 0.5%Mg, 0…

The fatigue performance of friction stir welded butt joints in 2024-T3 aluminium alloy plate (thickness 6.35 mm) was investigated by adopting six different tool designs and using a design of experiments analysis over a wide range of process paramete…

Numerical modelling and experimental measurements were undertaken to investigate the extension and microstructure of the HAZ during friction stir welding (FSW) of 7075 aluminium alloy (Al, 5.86%Zn, 2.37%Mg, 1.91%Cu) thin sheets (thickness 1.2 mm). W…

Friction stir welding trials, comprising double-sided butt welding of plates of thickness 10-11 mm, were conducted to investigate the weldability of copper and its alloys and to determine the correct process parameters (welding and rotation speeds) …

With regard to the development of ausformed H13 tool steel for high strength friction stir welding (FSW) tools, an investigation was undertaken to explore methods to improve equal channel angle extrusion (ECAE) as the deformation step. Studies invol…

Hot rolled AZ31 magnesium alloy plate of 6.3 mm thickness was friction stir welded (FSW) at rotation rates of 600-4000 rpm and a constant welding speed of 100 mm per minute and the microstructure and mechanical properties of the joints were investig…

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…

The effects of friction stir welding (FSW) on the corrosion resistance of aluminium alloys 2014A and 7075, both welded in the peak aged T651 condition, were studied. The effects of postweld heat treatment (retrogression and reageing treatment) were …

In relation to the application of ferritic/martensitic steels as cladding and duct materials in advanced nuclear reactors, an investigation is presented into the friction stir welding of P91 high alloy steel (0.11%C, 0.45%Mn, 8.41%Cr, 0.96%Mo) plate…

Friction stir welding (FSW) was employed to fabricate overlap joints in thin AA 7075-T6 aluminium alloy (Al, 5.1-6.1%Zn, 2.1-2.9%Mg, 1.2-2%Cu) sheets (thickness 0.8 mm) coated with an anticorrosive aluminium layer and the microstructure and mechanic…

Magnesium alloy AZ31H-H24 sheet of 3.175 mm in thickness was friction stir welded (FSW) using an H-13 tool having a shoulder of 20 mm diameter and a slightly tapered pin (4.5-5.5 mm diameter). Welds were made at 1000-2000 rpm and 20-300 mm/minute. T…

A coupled numerical and experimental investigation was undertaken to examine residual stress fields and thermal distortion in lap joints made from AA 5754-H22 alloy sheets (thickness 1 mm) by friction stir welding in order to examine the influence o…

Synchrotron x-ray diffraction measurements were used to obtain residual stress state data for welded joints made by friction stir welding (FSW) in AA-5083-H321 aluminium alloys as a function of process parameters (rotational speed and feed rate). Bu…

Friction stir welding experiments were undertaken on rolled plates (thickness 25.4 mm) of AA 6061-T6 aluminium alloys to investigate the role of backing plate material on thermal gradient changes in the through-thickness direction. Welding was perfo…

With regard to the development of spin-formed domes for aerospace cryogenic fuel storage tanks, an investigation is presented into a friction stir welding (FSW) process for AA 2219 and AA 2195 aluminium alloys and the influence of FSW tool and proce…

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 …

An investigation was undertaken into the wear mechanism and dominant material factors in relation to friction stir welding (FSW) tools made from precipitation strengthened, cobalt based alloys during FSW of Ti, 6%Al, 4%V alloys. Various gamma-gamma'…