TWI Digital Library

A modified friction stir lap welding process was developed to encase uranium alloy foil in an aluminium jacket and results were compared with two other bonding methods for fabricating monolithic fuel plates, namely hot isostatic pressing and transie…

Experimental measurements and finite element modelling were undertaken to investigate the deposition of AA1050 commercially pure aluminium layers on AA 2024-T351 aluminium alloy substrates by friction surface cladding (FSC). Experiments were perform…

An investigation is presented into the fabrication of welded joints in high strength aluminium alloys by friction stir welding (FSW) and into the application of the technology for manufacturing lightweight aircraft structures. The materials consider…

The plastic flow and microstructure of friction stir welded butt joints in aluminium alloy 7050-T7451 (Al, 6.2%Zn, 2.2%Mg, 2.3%Cu, 0.01%Zr) of thickness 7 mm were investigated. Cylindrical compression test samples (5.1 mm diameter and height) machin…

A Granular Computing (GrC) Neural-Fuzzy (NF) modelling approach that can learn relational data descriptions from a minimum number of experimental data is proposed for finding optimal process operating windows in friction stir welding (FSW). Research…

An investigation is presented into the occurrence of a grey line in x-ray diffraction of friction stir welded joints of AA 2024-T62 aluminium alloys, and its influence on mechanical and fatigue properties. Welding in 2 mm sheet was performed using a…

An investigation was undertaken to identify the main factors influencing abnormal grain growth behaviour during post weld solution heat treatment of 2219-O aluminium alloy (Al, 5.8-6.8%Cu) friction stir welded (FSW) joints. Sheet specimens (thicknes…

The use of semi-friction stir processing to improve the facing surface layer of flange joints in casings of high-voltage switchgears, filled with electro-insulating SF6 gas, was examined. The influence of tool shape and size, and welding parameters …

Experimental measurements and finite element modelling were undertaken to investigate the deposition of AA1050 commercially pure aluminium layers on AA 2024-T351 aluminium alloy substrates by friction surface cladding (FSC). Experiments were perform…

The development of a friction stir welding tool for thermoplastics, and specifically for ABS (acrylonitrile butadiene styrene terpolymer), is described. To eliminate the voids and poor mixing which resulted when sheet ABS was welded using a tool des…

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…

The floating bobbin friction stir welding (FSW) technique was employed to develop high performance aluminium floor slabs for road bridges and experiments were undertaken to investigate the influence of heat input on fracture location. Butt joints we…

With the aim of overcoming the thickness limitations of conventional friction stir welding (FSW), a multilayer multirun FSW process was developed in which six layers of ASTM A516 G70 (0.18%C, 1.1%Mn, 0.08%Cr, 0.16%Ni, 0.04%Mo, 0.02%Ti, 0.03%Al, 0.32…

A spot FSW robot system was developed and used to weld lap joints in aluminium alloys (used mainly in car body assembly) and the static strength of the welded joints was compared with resistance spot welded joints. A prototype spot FSW gun was combi…

The velocity field in the shear layer surrounding the tool/matrix interface in friction stir welding (FSW) was used to characterise material flow and was investigated by x-ray/computational tomography (CT) marker material experiments as well as anal…

A detailed experimental and theoretical investigation was made of the use of friction stir welding (FSP) to modify the microstructure of magnesium AM50 die castings. Rectangular die cast plates of 3 mm thickness of AM50 (Mg, 4.9%Al, 0.39%Mn) were su…

An experimental investigation was conducted of the microstructure and mechanical properties of friction stir welded (FSW) aluminium alloy butt joints, with detailed analysis on the influence of the FSW process on the microhardness profile and change…

A coupled Eulerian-Lagrangian approach with Abaqus v.6.14 finite element software was employed to model the whole friction stir welding (FSW) process within one continuous model and results for temperature fields, surfaces, weld formation and proces…

A moving gantry five axis CNC friction stir welding (FSW) machine was developed to facilitate the production of complex curved fuselage components (e.g. stringer and frame) based on third generation 2A97 Al-Li alloys. A ribbed curved component incor…

FSSW has been performed in two different automotive 1.5 mm-thick aluminium alloys– AA5754-H22 and AA6082-T6 in similar and dissimilar combination using different joining parameters (e.g. plunge rate, rotational speed and dwell time). Plunge depth ha…