TWI Digital Library

Butt joints were fabricated in a Ruuki Optim 700 MC Plus microalloyed low carbon high strength complex phase steel (0.06%C, 1.79%Mn, 0.01%V, 0.08%Nb, 0.11%Ti) using one-sided and two-sided friction stir welding in order to investigate the difference…

Friction stir processing (FSP) was employed to repair casting defects such as shrinkage cavities and porosity in nickel aluminium bronze, and the corrosion behaviour of the processed material was examined through short-term and long-term testing and…

The microstructural evolution during FSW of beta-annealed plates of Ti-5111 (Ti, 5%Al, 1%Sn, 1%Zr, 1%V, 8%Mo) was investigated above and below the beta transus temperature. Variable penetration tools of a refractory-based material with different dim…

Low temperature friction stir welding (FSW) was employed to join three types of carbon steels and the effects of carbon content, process conditions and phase transformations on the microstructure and mechanical properties of the welded joints were i…

To study the feasibility of SFW (spot stir friction welding) with adhesive, a process that is also called spot friction weld-bonding, aluminium 6111-T4 coupons (25x100 mm, thickness 0.9 and 1.0 mm) were used to produce SFW specimens in a lap shear c…

A phenomenologically based semiphysical modelling approach was employed to develop a process window for friction stir welding (FSW) of AA 2024-T3 aluminium alloy, incorporating simulation of the filling level of the welded joint as a means to determ…

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…

Abrasion circle and modified refill friction stir spot welding (FSSW) techniques were employed to fabricate dissimilar joints between 6111-T4 (Al, 0.75%Mg, 0.69%Si, 0.75%Cu) and AZ31 (Mg, 3%Al, 1%Zn, 0.5%Mn) alloy sheets (thickness 0.9 mm) with the …

The microstructure, static and dynamic fatigue failure properties of friction stir spot welds in advanced high-strength steel were investigated. Welds were made in the overlap configuration in uncoated and galvanised dual-phase DP800 steel (1.25 mm …

Carbon nanotube reinforced AA 6063 aluminium alloy (Al, 0.65%Mg, 0.34%Si) metal matrix composite (MMC) sheets (thickness 1.8 mm) were joined by friction stir welding (FSW) and experimental studies were undertaken to examine the MMC weldability as we…

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…

The use of a full-length welding process to repair defective friction stir welded (FSW) butt joints in aerospace aluminium alloys was evaluated. Lack of penetration, offset and tunnel defects were investigated in AA6156-T6, AA2198-T8 and AA2024-T3 a…

Friction stir welding was employed to fabricate bead-on-plate welds on AA 6063 aluminium alloy sheets (thickness 5 mm) and dissimilar joints between AA 6063 and S45C carbon steel plates (thickness 6 mm), and the influence of weld shape on microstruc…

The microstructure, hardness, indentation profile, tensile strength, fracture cracking and grain boundaries of friction stir overlap welds in 2124 aerospace aluminium alloy were investigated. Welds were made in EN AW-2124 heat-treatable wrought AlCu…

An indirect temperature measurement system was developed based on the acquisition of torque and process forces during friction stir welding (FSW) and a mathematical model incorporating a grey box approach was formulated to determine the correlation …

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…

Haynes Alloy 282 (Ni, 19.45%Cr, 10.28%Co, 8.55%Mo) was deposited onto Inconel 600 substrates (Ni, 16.69%Cr, 9.36%Fe) using a cold-wire TIG process, subjected to additive friction stir processing (AFSP) to create gamma-strengthened surface layers, an…

The influence of weld length on pin breakage during friction stir welding (FSW) of aluminium alloy was investigated. Tool geometry, microstructure, pin diameter and the occurrence of cracking were studied during welding. Welded joints were made in 7…

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…