TWI Digital Library

An experimental investigation was conducted into the effects of friction stir processing (FSP) and post-FSP ageing on the microstructure and mechanical properties of Alloy 718 castings. Bead-on-plate welds were fabricated on cast Alloy 718 sheets (t…

Friction stir welding (FSW) was employed to join ultra fine grained C-Mn steel (0.14%C, 0.2%Si, 1.84%Mn) sheets of 5 mm thickness using a polycrystalline cubic boron nitride tool, and the metallurgical and mechanical properties of the joint were eva…

A multi-physics model for thermal simulation of bobbin-tool friction stir welding was developed assuming a partially sticking condition at the tool-matrix interface, and simulation results were compared with experimental data for welding of AA7449 a…

The material flow of aluminium alloy and steel during dissimilar friction stir spot welding was visualised using zinc tracers and the surface temperature of the flat-tipped tool during stirring was measured by telemetry. Welds were produced in AA505…

Dissimilar joints between wrought 5083 and 6111 aluminium alloys and between AZ31 magnesium alloy and 6111 were fabricated by friction stir welding and their microstructure and mechanical properties were investigated. The starting materials were 508…

Friction stir spot welding (FSSW) experiments were undertaken on sheet specimens (thickness 1.3 mm) of AZ31 magnesium alloy (Mg, 3%Al, 1%Zn) and the effects of process conditions and workpiece surface condition on the macrostructure, microtexture an…

Friction stir welding (FSW) experiments were undertaken on Invar 36 alloy (Fe,36%Ni) sheet specimens (thickness 3 mm) and the microstructure evolution and recrystallisation mechanism were investigated. Bead-on-plate FSW was performed using a polycry…

An experimental study was carried out to investigate the link between the microstructure and the mechanical and corrosion properties for a friction stir welded aerospace aluminium alloy 7349-T6 (Al, 1.4-2.1%Cu, 1.8-2.7%Mg, 7.5-8.7%Zn) developed for …

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…

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…

Friction stir welding (FSW) experiments were performed to join two dissimilar aluminium alloys, AA-7075 (Al, 5.58%Zn, 2.48%Mg, 1.38%Cu) and AA-2024 (Al, 4.5%Cu, 1.36%Mg), in a butt configuration, and the microstructural and hardness characteristics …

A pinless tool with involute grooves on its shoulder surface was designed to facilitate friction stir spot welding (FSSW) of 2024-T3 aluminium alloy (Al, 3.8-4.9%Cu, 1.2-1.8%Mg, 0.3-0.9%Mn) sheets (thickness 1.5 mm) and the influence of process para…

A detailed experimental and theoretical investigation was made of the use of friction stir welding (FSP) to modify the microstructure of magnesium AM50 die castings. Rectangular die cast plates of 3 mm thickness of AM50 (Mg, 4.9%Al, 0.39%Mn) were su…

An experimental investigation was conducted of the microstructure and mechanical properties of friction stir welded (FSW) aluminium alloy butt joints, with detailed analysis on the influence of the FSW process on the microhardness profile and change…

An experimental investigation was made into the friction stir weldability of MRI 320D magnesium alloy and of hybrid joints between AZ91D and rolled aluminium alloy AA5454. Welding was optimised to perform FSW joints of light metal alloys with a thic…

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…

Two friction stir welding (FSW) procedures, a sacrificial anvil method and a hybrid FSW/arc welding technique, were developed to assure consistent full penetration welds during the construction of offshore and onshore pipelines, respectively. The of…

The principles are presented of stationary shoulder friction stir welding (FSW) with examples of the weld microstructures that can be achieved. Trials were conducted on 6.35 mm plate of Ti-6%Al-4%V titanium alloy, with spindle speed of 400 rpm and t…

A finite element model based on a staggered thermo-fluid solution scheme was employed to investigate flow around friction stir welding (FSW) tools, "MORFEO" code simulations were undertaken to predict flow patterns and temperature distribution in th…

A series of friction stir welding (FSW) experiments using threaded tool pins and AA5083 (Al, 4.5%Mg, 0.6%Mn) or A356 (Al, 7%Si, 0.3%Mg) workpiece alloys was undertaken in order to understand material flow mode within thread spaces and its influence …