TWI Digital Library

The development of an industrialised robot for friction stir welding (FSW) for aluminium alloys is described. The influence of the main processing parameters, plunging and rotational speeds, on FSW performance and efficiency were investigated. The q…

The use of friction stir processing (FSP), a process derived from friction stir welding, to tailor a material's microstructure locally to achieve maximum performance was investigated. Superplastic behaviour was examined in friction stir processed 5 …

Friction stir spot welding (FSSW) was performed on dual phase 800 high strength automotive steel (0.14%C, 0.23%Si, 1.52%Mn) to establish the effect of tool rotation speed (750-2400 rpm) for a number of weld cycles featuring different Z-axis plunge r…

Technology improvements and process innovations in respect of friction stir welding (FSW) of high temperature materials are reviewed, welding process conditions and mechanical properties of completed welds for various alloys using polycrystalline cu…

The mechanical properties and microstructures of dissimilar butt welds made between aluminium die casting alloy ADC1 (Al, 11.9%Si, 0.37%Fe, 0.44%Mg) and the extruded alloy A-6061-T6 (Al, 0.84%Mg, 0.67%Si) were studied. The materials were 4 mm thick …

Vertical and angular truss extrusions made from 6082-T6 aluminium alloy (Al, 0.7-0.74%Mg, 1.04-1.14%Si, 0.53-0.54%Mn) were friction stir welded in a half-overlap configuration to fabricate panels for marine applications and their fatigue performance…

A thermal model with a thermo pseudo mechanical (TPM) heat source was employed to investigate the influence of process parameters (rotational speed, feed rate and tool geometry) on the temperature profile at the interface of dissimilar metal lap joi…

The CFD (computational fluid dynamics) technique was employed to develop a numerical model of friction stir welding (FSW) of DH36 steel (0.16%C, 1.2%Mn, 0.02%Cr, 0.02%Nb, 0.04%Al, 0.03%Cu) plate (thickness 6 mm) under low and high welding speed cond…

Friction stir welding experiments were conducted on AA 2024-T3 Al-Cu-Mg alloys to investigate the influence of backplate design on joint microstructure and mechanical properties. Trials were performed using three specially designed backplates based …

The effect of welding conditions (tool rotational speed and tool holding time) on static strength was studied for dissimilar friction stir spot welds between 2017-T6 (Al, 3.5-4.5%Cu, 0.8-1.5%Mg) and 5052 (Al, 2.2-2.8%Mg) aluminium alloy sheets (thic…

With regard to the development of Al-Mg-Sc alloys for aerospace applications, an investigation is presented into friction stir welding (FSW) of thick plates (thickness 35 mm) and thick-walled pipes made from 1570C alloy (Al, 5.7%Mg, 0.29%Mn, 0.2%Sc,…

A feasibility study was undertaken to investigate friction stir welding of hybrid lap joints between polyphenylene sulphide and AA 6111 alloy (Al, 0.76%Mg, 0.63%Si, 0.75%Cu) sheets (thickness 2 and 1.5 mm, respectively) and the influence of process …

The weldability of zirconium-titanium alloy joints fabricated by means of friction stir welding (FSW) was investigated. Sheets (thickness 3 mm) of Zr-Ti alloy (Zr, 41%Ti, 4%Al, 3%V) underwent FSW with a tungsten-rhenium alloy (W, 25%Re) tool with an…

Microstructural observations and mechanical tests were undertaken to investigate the phase transformation behaviour of low alloy Cr-Mo steel (0.2%C, 0.61%Mn, 1.07%Cr, 0.16%Mo) sheets (thickness 1.6 mm) during friction stir welding. Stir-in-plate typ…

Bead-on-plate welds were fabricated in S31254 superaustenitic stainless steel (19.82%Cr, 17.78%Ni, 6.13%Mo) plates (thickness 6 mm) using friction stir welding (FSW) and their microstructure and texture evolution were studied by high resolution elec…

An experimental study was conducted to measure the torque of friction stir welded cast aluminium A356 (Al, 7%Si, 0.3%Mg) over a range of travel and rotational speeds. Plates of 6.35 mm thickness were FSW using travel speeds and rotational speeds ran…

The influence of welding speed on the friction stir welding (FSW) of a 304 austenitic stainless steel butt joint was investigated. Austenitic stainless steel SUS304 specimens of 160 mm length, 35 mm width and 1.5 mm thickness were butt-welded with a…

Friction stir welds were produced from S460N and S355N steel alloys for several combinations of welding speed and rotational speed with the heat input ranging from 130 to 180 [J/mm]; or, from insufficient to excessive. The welds were characterised a…

The development of a novel friction stir welding (FSW) monitoring for the in-process collection of tool force data is reported. The concept and features of this Advanced Rotating Tool Environment Monitoring and Information system (Artemis), based ar…

An overview is presented of the benefits and limitations of stationary shoulder friction stir welding (SSFSW) compared with conventional FSW and other joining technologies; the challenges faced when applying FSW on a serial kinematics robot in relat…