TWI Digital Library

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…

A report is presented into the friction stir welding (FSW) fabrication of an aluminium deck for a pedestrian bridge over the Petite Decharge river (Alma, Quebec, Canada), incorporating the design and manufacturing of extrusions, FSW tools and a syst…

Thermomechanical and microstructural modelling were performed for the friction stir welding process, simulating the thermal diffusion during and after welding (in the cooling stage), and comparing the results with experimental data obtained for fric…

An approach to welded joint inspection incorporating in situ characterisation of weld quality was developed to facilitate the detection of discontinuities (e.g. voids and volume defects) during friction stir welding (FSW). FSW experiments were perfo…

Finite element models of the friction stir welding of aluminium alloys are reviewed and the results compared with experimental measurements. Contact between the pin and the workpiece is considered in two ways: frictional contact; or assuming the mat…

An investigation is presented into the use of temperature control in two friction stir welding (FSW) research projects: to understand the effect of backing plate conductivity on process parameters and to study the influence of active FSW tool coolin…

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…

A review is presented of the progressive emergence of conceptual tools associated with friction stir welding (FSW) at the Marshall Space Flight Center, USA, from the discovery of the shear surface, wiping metal transfer and the invention of a kinema…

Friction stir spot welding experiments were conducted on dissimilar metal joints between AA5052 aluminium alloy and two kinds of steel (980 MPa high tensile strength steel and 270 MPa mild steel), and the microstructure and mechanical properties of …

A friction stir welding technology was developed to facilitate welding extruded profiles together as a whole side wall in an aluminium railway wagon for coal transportation. The material employed was an AA 6061-T6 alloy plate (thickness 7 mm). Some …

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…

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…

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…

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…

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…

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…

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…