TWI Digital Library

An ultrasound assisted friction stir welding (UA-FSW) technique was employed to fabricate butt joints in similar Al/Al and dissimilar Al/Mg sheets, and the influence of ultrasonic oscillations on weld zone microstructure and mechanical properties wa…

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 …

The use of friction stir welding in aircraft manufacture, particularly the Airbus, both as an alternative to riveting and for the production of tailored blanks, is discussed. Potential benefits include cost and weight reduction. The European aircraf…

Friction stir welding (FSW) has been widely used in the automotive, aerospace, and high-tech industries due to its superior mechanical properties after welding. However, when it becomes matter to perform a high-quality joint using FSW, it is necessa…

Friction stir welding (FSW) was employed to fabricate a single overlap joint between sheet specimens (thickness 1.5 mm) of an AA 6181-T4 aluminium alloy and ZStE-340 high-strength steel, and weld phase composition, microstructure and mechanical prop…

With regard to the occurrence of coarse alpha-Al dendrites, eutectic phase, shrinkage porosity and other defects in cast aluminium alloys, an investigation was undertaken into the influence of different combinations of friction stir processing (FSP)…

In order to study the relationship between material flow and the development of highly variant process forces during friction stir welding (FSW), a high sampling rate triaxial force measurement device and a high speed camera were employed to monitor…

With regard to the development of friction stir shaping as a modified friction stir welding (FSW) process to maximise material flow within the weld zone and redistribute it into new shapes or features outside of or on top of the weld zone, an invest…

Friction stir welding experiments between AA 6063 aluminium alloy and S45C carbon steel (thickness 6 mm) were performed, and the effects of heat input on the butt joint macrostructure (cavities formed at weld interface), hardness and plastic flow of…

The use of friction stir welding, as an alternative to bolted or riveted joints, for the assembly of Airbus wings is discussed. Issues considered include: cost reduction, weight reduction, joint quality, and enhanced in-service performance. Potentia…

The mechanical properties and microstructures of friction stir butt welds in 6.4 mm and 12.7 mm thickness quenched and tempered martensitic steel plate were compared with those of GMA butt welds in the same parent metal. The friction stir welds in t…

With regard to inconsistencies in the literature concerning the correlation between friction stir welding (FSW) process inputs and post weld process or material response, an investigation is presented into the primary variables (temperature, cooling…

SiC particle reinforced 2124Al metal matrix composite (MMC) plates (thickness 8 mm) were joined by friction stir welding (FSW) and the relationship between process parameters, weld defect formation and joint mechanical properties was investigated. T…

Friction stir lap diffusion welding was employed to fabricate dissimilar AA 6060 aluminium alloy/mild steel joints and mechanical testing and metallurgical examination of the weldments were undertaken to investigate the effect of microstructure form…

Friction Stir Welding (FSW) is a relatively new technique which utilizes frictional heating combined with a forging pressure to produce virtually defect-free high strength bonds. Although considerable experimental work has been reported in the liter…

The microstructures and strengthening mechanisms during friction stir processing (FSP) of AZ91 (Mg, 9%Al, 1%Zn) die-cast and Mg-Y-Zn (Mg, 5.9%Y, 2.6%Zn and Mg, 5.5%Y, 4.3%Zn) cast alloys were investigated and the effect of second phase particle disp…

An finite element method (FEM) model, considering variables such as tensioning level, heat input and sheet geometry but ignoring mechanical tool effects, was developed to investigate the efficacy of the mechanical tensioning technique for controllin…

The relationship between microstructure and properties in friction stir welding was studied. The effects of grain size, particle size and distribution, and dislocation density on weld strength in friction stir welds in work-hardenable Al alloy AA 52…

In this study, the improvement of process stability of bobbin tool FSW for long welding length was studied. The base material used in this study was 18mm thickness 5083-O Al alloy. Floating bobbin type tools were used in this study. FSW produced def…

Bobbin-tool friction stir welding (BT-FSW) is a variant process of conventional friction stir welding with a particular tool configuration composed of an additional lower shoulder, enabling additional heat input and complete penetration of the pin. …