TWI Digital Library

Friction stir welding experiments were undertaken on Ti-6%Al-4%V sheets (thickness 2 mm) in order to investigate the influence of process conditions on stir zone microstructure and local texture. Welding was performed at rotational speeds of 225-300…

The numerical simulation of the friction stir welding process using two different commercial finite element codes is described. FORGE3, which uses an updated Lagrangian approach, was used to simulate the plunge of the pin and the THERCAST package, w…

With regard to the occurrence of residual oxide defects associated with friction stir welding (FSW) of aluminium alloys, an investigation is presented into a possible alternative mechanism for oxide formation within the weld nugget involving enhance…

An experimental investigation was made of the effect of welding tool shape on welding defects and material flow during friction stir welding (FSW) of dissimilar materials. Friction stir welding tools used had tool shoulders of tool steel and the pro…

Friction stir welding (FSW) experiments were conducted on magnesium alloys, wrought AZ31 (Mg, 3%Al, 1%Zn) and cast AZ91 (Mg, 9%Al, 0.6%Zn), to investigate the effect of process conditions on microstructure and hardness. Welding was performed at rota…

Extruded AZ31 (Mg, 3%Al, 1%Zn) alloy plates (thickness 6 mm) were joined by one-run or two-run friction stir welding (FSW) and the microstructure, mechanical properties and residual stress characteristics of the welded joints were investigated. FSW …

An experimental investigation is presented into the fatigue properties of welded joints made by friction stir welding (FSW) of 2024-T4 (Al, 4.4%Cu, 0.6%Mn, 1.5%Mg) and 2014-T6 (Al, 4.5%Cu, 0.8%Mn, 0.5%Mg) aircraft alloys and their dependence on proc…

Evaluation of phased array ultrasonic inspection for the detection of typical friction stir weld defects is reported. Characteristics of friction stir welds with respect to inspectability are described. Phased array operation is outlined. A variety …

Friction stir welded joints in aluminium alloy 6061-T6 sheet were produced using a robot arm, to assess the ability of the arm to withstand the mechanical stresses associated with friction stir welding. The arm was fitted with an electrically powere…

Friction stir welding of aluminium alloys suitable for railway and shipbuilding applications was investigated. Sheet of 4 mm thickness of alloys 6N01-T5 (Al, 0.7%Mg, 0.6%Si, 0.1%Cu) and 5083-H112 (Al, 4.7%Mg) were friction stir welded, and the joint…

Dissimilar overlap joints between different aluminium alloys were fabricated by friction stir welding (FSW) and the influence of alloy composition and FSW tool type on fatigue fracture, microstructure and mechanical properties was investigated. The …

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…

Flame resistant AZX 612 (Mg, 6%Al, 1%Zn, 2%Ca) magnesium alloy joints were fabricated by asymmetric double sided friction stir welding (FSW) and the influence of tool rotational speed on their microstructure and mechanical properties was investigate…

A friction stir welding (FSW) methodology, incorporating Taguchi quality engineering to optimise process parameters, was developed to fabricate a cold plate consisting of copper pipe embedded in the machined groove of a 6061 aluminium alloy base pla…

Several kinds of Co-based alloys with different mechanical properties (e.g. high temperature strength, hardness, wear resistance and gamma-solvus temperature) were designed for friction stir welding (FSW) tool applications by varying chemical compos…

The results of quality assessments, based on visual examination, mechanical testing, analysis of weld structures and hardness testing, of both similar and dissimilar friction stir welded (FSW) joints of aluminium casting alloys EN AC-42100, EN AC-43…

In relation to the development of corrosion barrier capsules for spent nuclear fuel disposal, friction stir welding experiments were conducted on oxygen-free copper plate specimens (thickness 20 mm) using different joint preparation, shielding gas a…

3-point fatigue bending tests and finite element method simulations were employed to study the fatigue performance of combined lap-butt joints fabricated by friction stir welding in 6005A-T6 alloy (Al, 0.61%Si, 0.54%Mg) extruded profiles for railway…

Two 3D numerical simulation models were employed to investigate the relationship between forces and torques during high-speed friction stir welding (FSW) with respect to mechanistic defect development owing to process parameter variations, and the t…

To assess the feasibility of friction stir welding of Ti-6Al-4V alloy (thickness 5 mm), appropriate pin tool material and processing parameters were determined, thermal and environmental management systems were tested, and both A- and B-basis design…