TWI Digital Library

The material point method based on NairnMPM software was employed to formulate a 2D model of elastoplastic material flow around a friction stir welding (FSW) tool probe and to examine 2D elastoplastic deformation and the frictional interaction at th…

3rd International Symposium, 27-28 Sep 2001, Poster Session, Paper 13

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 …

Based on the detailed analysis of the microstructure on top surface of friction stir welded (FSW) joint of 2024 aluminum alloy by optical microscope, XRD and transmission electron microscope. SEM was employed to obtain the in-situ corrosion developm…

An investigation was undertaken to evaluate the separation forces exerted by the tool on the fixture compared to the weld process loads generated during butt welding of self reacting bobbin friction stir welds. Two tempers of an aluminium alloy were…

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…

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…

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…

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 …

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…

Precipitation hardened copper alloy sheets (thickness 2 mm) containing Cu, 0.9-1.2%Cr, 0.06-0.09%Zr were joined by friction stir welding (FSW), process parameters were optimised to realise defect-free joints, and the microstructure and mechanical pr…

Friction stir welds in austenitic stainless steels 316L (0.019%C, 0.87%Mn, 17.70%Cr, 12.19%Ni, 2.19%Mo) and 304 (0.040%C, 1.08%Mn, 18.10%Cr, 8.56%Ni); duplex stainless steel 329J4L (0.016%C, 0.78%Mn, 24.81%Cr, 7.27%Ni, 3.13%Mo, 0.43%Cu, 0.41%W); and…

A review is presented of various models developed to understand the effects of thermal cycles and metal flow behaviour on the microstructure and properties of welded joints fabricated by friction stir welding of steel, and a comprehensive numerical …

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…

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…

With regard to the development of the MELD process (formerly, additive friction stir deposition) involving the deposition of feedstock material on a substrate via a hollow rotating tool, a mesh-free coupled thermomechanical approach called smoothed …

In relation to the development of a friction stir welding (FSW) process to seal copper canisters for nuclear fuel waste, an investigation was undertaken into material and heat flow in FSW copper plates (thickness 50 mm) by inserting brass rods into …

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 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…

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…