TWI Digital Library

Friction stir welding (FSW) was carried out on A-6N01-T5 aluminium alloy of thickness 15 mm in various restraint conditions, and the amount of deformation before and after welding was investigated. Vertical distortion and lateral shrinkage of the we…

The joint strength of friction stir welded extruded and T6 tempered sections of 6000 series aluminium alloys (JIS 6N01, 6061, 60663 and 6082), thickness 12-20 mm, was investigated. Friction stir welding (FSW) parameters are given for one-pass and tw…

Friction stir welding of aluminium alloy JIS-6N01-T5 (Al, 0.4-0.8%Mg, 0.4-0.9%Si) was investigated for subway [underground railway] rolling stock applications by comparing the welded joint properties with those of MIG and laser welded joints. Sheet …

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…

The test results are reported for preliminary trials of the feasibility and benefits of applying angular reciprocating (reversal within one revolution) or rotary reversal (reversal after one or more revolutions) motion to the tool during friction st…

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…

Friction stir welding of UK Ministry of Defence Def Stan 95-22 7017 aluminium alloy (Al, 4.5%Zn, 2.0%Mg) armour plate was evaluated by studying the mechanical properties and cracking of welded joints. Initially plate of 10 mm thickness, locally redu…

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…

An experimental investigation was undertaken to study the effects of different pin profiles (threaded conical, square, pentagon and hexagon) and the same process parameters on temperature distribution around the tool and resulting microstructure dur…

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…

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…

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 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…

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,…

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…

The effects of stir rod angle (0-3 degrees), rotation speed (500-2500 rpm) and travel speed (1-8 mm/s) on metal flow in friction stir welds in pure aluminium (A-1100) and an Al-0.5%Mg alloy (A-5005) were studied. The microstructure, hardness and ten…

The development of robots, tools and control systems for three-dimensional friction stir welding of aluminium alloy plate up to 10 mm thickness is described. Robots have been developed with a triangulated arm construction, which provides the necessa…