TWI Digital Library

Friction stir welding (FSW) trials were carried out for thin HSLA-65 steel plate (6 mm thickness) to evaluate the potential benefits of using induction preheat. Other studies including tool design and multi-run welding are also evaluated as methods …

With regard to the fabrication of hollow structures by the inversion friction stir welding (IV-FSW) technique, welded joints were fabricated in A-1050 and A-6061 aluminium alloy and SPCC steel sheets (thickness 2 mm) by IV-FSW and their surface appe…

The bobbin tool or self-reacting tool variant of the friction stir welding process was investigated on butt joints of various 2000 series aluminium alloys for aircraft fuselage applications; welding feasibility tests were conducted in pin length con…

An instrumented constrained Charpy test was used to measure the fracture toughness of friction stir welded joints produced using several designs of welding tool in sheet aluminium alloys 6082 (4.7 mm) and 7108 (3.2, 5.0 mm). This test constrained pl…

A comparative study was undertaken of three different machine types, a modified high payload robot, a CNC milling machine and an ESAB "SuperStir" FSW machine, in terms of their capability for FSW of various aluminium alloys using identical process p…

Friction stir welding was employed to fabricate welded joints in AA 7475-T7351 aluminium alloy plates (thickness 6.35 mm) and the effect of kissing bond defects on fatigue life and other mechanical properties was investigated. Welded test specimens …

Friction stir welds were made in 4 mm thick sheets of aluminium alloys 2024-T3 and 6013-T6. The stress intensity factor due to residual stresses was determined using the cut compliance method. The residual stress distribution was calculated using th…

A direct modelling approach ("SAMCEF" software finite element simulation) coupled with an inverse model, based on genetic algorithm optimisation (MAX software), was applied to the friction stir welding (FSW) process for two aluminium alloys (6005A-T…

Friction stir processing (FSP) was employed to fabricate oxide dispersion strengthened copper-based composite plates with a graded microstructure and evolving mechanical, thermal, electrical and wear properties along their thickness. Specimens compr…

A friction stir channelling process to promote a distinct material flow was developed, in which a controlled amount of viscoplasticised material from the metal workpiece flows out from the processed zone producing an internal channel without any gap…

WC, 12%Co cemented carbide layers were deposited onto M2 tool steel (0.8-0.88%C, 3.8-4.5%Cr, 4.7-5.2%Mo, 5.9-6.7%W, 1.7-2.1%V) substrates by HVOF spraying and the effect of subsequent friction stir processing (FSP) on bonding strength and cermet coa…

Friction stir welding (FSW) experiments were undertaken on AA 5083 aluminium alloys to investigate the influence of process parameters (rotational and travel speeds) and preheating temperature on abnormal grain growth after PWHT. The experimental sp…

A coupled numerical and experimental investigation was undertaken to examine residual stress fields and thermal distortion in lap joints made from AA 5754-H22 alloy sheets (thickness 1 mm) by friction stir welding in order to examine the influence o…

Friction stir welding experiments were undertaken on Al-Li alloys for application to C919 passenger aircraft fuselage panels, and the microstructure and mechanical properties of the welded lap joints were investigated. The materials comprised 2060-T…

Friction stir welding was conducted on Al alloy 6005A-T6 plates of 6 mm thickness. The power input was determined from torque measurements. The effects of advancing speed and rotation speed on total power input were examined. Thermal cycles were mea…

Artificial Intelligence algorithms based on machine learning approaches have recently found application in joining and welding, e.g., for the optimization of process parameters or the prediction of resulting mechanical properties. The importance of …

Lap joints were fabricated in 2024-T3 aluminium alloy sheets (thickness 1 or 0.6 mm) by refill friction stir spot welding (RFSSW) and the influence of tool sleeve depth on joint quality was investigated. Welding was performed at tool depths of 1.1-1…

A project to introduce friction stir welding for aluminium shipbuilding in Taiwan is described. The advantages of FSW compared with arc welding for this application are summarised. Stages of the project are outlined, covering work with local tool fa…

With regard to the application of friction stir welding (FSW) for the butt weld joining of aluminium alloy extrusions into large panels for ship decks and railway carriages, an investigation is presented into the employment of laser ultrasonic testi…

Friction stir spot welding experiments were undertaken on AZ31 magnesium alloy (Mg, 3%Al, 1%Zn, 0.2%Mn) sheets (thickness 2 mm) in order to investigate the influence of a flame spray gun rapid preheating process on the microstructures and mechanical…