TWI Digital Library

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…

5083-O aluminium alloy sheets (thickness 3 mm) were butt welded using a gate-type friction stir welding (FSW) machine to investigate tolerance to deviations in butt-line/tool-travel line, gap spacing and tool roll angle, and the welded joints were e…

An experimental study was carried out to investigate the effect of welding conditions on weld macrostructure and the microstructure and mechanical properties of the nugget zone in welds in AA-7010 aluminium alloy made by friction stir welding (FSW).…

Torsion testing was carried out using a range of temperatures and strains to simulate the formation of nugget zone grain structures in friction stir welds of a typical aluminium alloy (7010) in order to investigate the formation mechanisms. Electron…

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…

A kinematic approach is presented for modelling the friction stir welding process and the relationship between tool geometry and process parameters. The model was used to describe the correlation between features of the weld nugget, process paramete…

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…

With regard to the production of aluminium alloy T joints for stiffened panel construction by friction stir welding (FSW), an investigation is presented into the fabrication of FSW T joints with AA 6082-T6 alloys and the influence of welding paramet…

Tapered probe and parallel probe tools were employed in friction stir welding of thick section AA 6082-T6 aluminium alloy specimens (thickness 38 mm) and the effect of tool geometry on weldment microstructure and crystallographic texture was investi…

Friction stir welding (FSW) experiments were undertaken on commercially pure Ti and Ti-6%Al-4%V plates (thickness 6 mm) by incorporating nickel foil markers of varying thicknesses to reduce forging load, enhance surface finish, eliminate void format…

Friction stir welding tools of three different compositions (MS80, Q70 and Q60) of polycrystalline cubic boron nitride (PCBN) were tested to examine wear and fracture sensitivity. Three tools were made from each composition and were run for a total …

A real-time wireless temperature measurement system was developed to facilitate improved temperature measurement at the tool-workpiece interface and a closed-loop control system for friction stir welding (FSW) that maintains weld quality under vario…

The design of a polycrystalline cubic boron nitride friction stir welding tool, tool holder and machine for use with high melting temperature materials is described. A polycrystalline cubic boron nitride truncated cone tool tip, capable of working a…

In relation to the challenges involved in temperature data acquisition and transmission associated with rotation of the friction stir welding (FSW) tool, an investigation is presented into a wireless temperature monitoring system based on thermocoup…

AA 6063-T5 aluminium alloy L-shape stringers (thickness 2 mm) were friction stir welded in an overlap configuration positioned over AA 2024-T3 sheets (thickness 3 mm) using various process conditions and three different tool designs with respect to …

To better understand the heat generation, temperature distribution and material flow during friction stir welding (FSW), experiments, including some with a pin breaking technique, were undertaken on two aluminium alloys (5083-O (Al, 4.5%Mg) rolled p…

Friction stir welding was employed to fabricate welded joints in Ni-free 18%Cr, 2%Mo, 0.85%N austenitic steel sheets (thickness 3 mm) and the gradient characteristics of the microstructures and mechanical properties were investigated along transvers…

The concept and theoretical principles of friction flow welding are presented. Numerical simulation using 'Deform-3D' software was used to compared and optimise the process. The applicability of friction flow welding to different aluminium alloys wa…

Friction stir welding (FSW) using a milling machine was employed to join AA-6063-T6 alloy (Al, 0.51%Mg, 0.42%Si) pipes (diameter 110 mm, thickness 5 mm) with the aim of eliminating ploughing problems, and weld zone microstructures were studied as a …

A numerical simulation is presented for the development and integration of a pin tool for friction stir welding (FSW) of aluminium alloys. The Triflute tool design was optimised. The macro- and microstructure of lap joints in A6N01 alloys were studi…