TWI Digital Library

Dissimilar lap joints were fabricated in various aluminium alloys by conventional friction stir welding (FSW) and a hybrid FSW process involving two adhesive systems, and the influence of thermal degradation of adhesive on the microstructure and mec…

A friction stir spot welding (FSSW) process was employed to fabricate dissimilar joints between an AA 5754 aluminium alloy and an AZ31 magnesium alloy in a lap joint configuration using a Zn layer at the interface to suppress intermetallic formation…

A brief review is presented of the RIFTEC welding job shop, a major supplier for friction stir welded components in Germany, and Hammerer Aluminium Industries (HAI) in Austria and some of their applications to railway, automotive and electronic indu…

In this study, Zr55Cu30Al10Ni5 bulk metallic glass (BMG) and pure copper plates were successfully joined by friction stir butt welding, friction stir lap welding and friction stir spot welding, respectively. Microstructure characterization by OM, EB…

Two initiatives are presented to develop friction stir welding (FSW) and friction stir spot welding (FSSW) design data for the aerospace industry: a path independence initiative for FSW butt joints and qualification of FSSW welds for lap joints as i…

Butt joints were fabricated by friction stir welding (FSW) in 4340 steel (0.43%C, 0.69%Mn, 0.76%Cr, 1.76%Ni, 0.24%Mo, 0.43%V, 0.16%Cu) and between 4340 steel and Inconel 718 (Ni, 17-21%Cr, 4.7-5.5%Nb, 2.8-3.3%Mo) and their microstructure and mechani…

A combination of laser surfacing and friction stir processing (FSP) was employed to modify a cold-worked AISI D2 tool steel (1.5%C, 11%Cr, 0.83%Mo, 0.36%V) with the aim of clarifying the FSP conditions required to obtain a microstructure with unifor…

A review is presented of the development programme to achieve a production-ready procedure to manufacture copper canisters for Swedish radioactive waste storage using friction stir welding (FSW) for encapsulation, incorporating adaptive thermal mana…

A geometric feature, termed the "Wiper", was developed to improve the weld track surface finish produced by friction stir welding (FSW) and processing tools with scrolled shoulders, and experiments were undertaken to investigate the influence of "Wi…

Ultrafine grained test pieces of aluminium, copper and steel produced by the accumulative roll bonding process were friction stir butt welded at various revolutionary pitches, and the microstructures and mechanical properties (tensile strength, Vick…

A discussion is presented on research studies carried out to develop friction stir welding (FSW) as a method for the production of thick (50.8-76.2 mm; 2-3 in) aluminium alloy 7050 tailored blanks suitable for use in the aerospace industry. Single r…

Thick section friction stir welds were made in 25.4 mm (1 in) 5083-H131 and in 18.4 mm 2195-T8P4 aluminium alloy plates by single-pass friction stir welding (FSW) using new welding tool designs. The alloys are used for aerospace applications. The sh…

Aluminium alloy A6N01-T5 (Al, 0.63%Mg, 0.53%Si) hollow extrusions suitable for joining by friction stir welding, to be used in the generation of Japanese railway rolling stock, were designed, and the static and fatigue tensile strength of joints wer…

A new "stop action" technique was used to investigate material flow during the friction stir welding of aluminium alloy 6061-T6 plate of thickness 6.4 mm (0.25 in). The technique involved stopping the welding process and examining the microstructure…

The modification of a thermally sprayed cemented layer of WC-CrC-Ni (WC-20%CrC-7%Ni) and WC-Co (WC-12%Co) using friction stir processing (FSP) was investigated. Layers of WC-CrC-Ni and WC-Co were sprayed onto SKD61 substrate (17 mm thickness) by HVO…

An investigation was made of approaches to tool design for the self reacting pin tool (SRPT) (bobbin tool) to mitigate the effects of friction stir welding owing to enlarged grains that occur in large structural extrusions, in order to yield accepta…

A review is presented of FSW (friction stir welding) tool design parameters and their relationship with heat generation, material flow and weld quality, including discussions of interaction mechanisms between tool and specimen, typical tool designs,…

8th International Symposium, 18-20 May 2010, Session 5A: Industrial Applications 1, Paper 03

AZ31 magnesium alloy sheets (thickness 4 mm) were joined by friction stir welding under process conditions with and without a heat sink, and the residual stress distribution in the joints was investigated by a hole drilling method according to the A…

With regard to the application of friction stir welding (FSW) of ultra thin aluminium sheets (thickness less than 1 mm) to electronic packaging and micromechanical component joining, an investigation is presented into fixturing, process parameter an…