TWI Digital Library

A friction stir welding (FSW) procedure, incorporating the use of different tool pins in combination with concave or scroll type shoulders, was employed to join various aluminium alloys; material flow was investigated with the aid of computer micro-…

With regard to the development of the stationary shoulder friction stir welding (FSW) technique as a long term loading joining process offering enhanced weld seam mechanical properties, an investigation is presented into coordinated material flow be…

Friction stir spot welding experiments were undertaken on AZ31 magnesium alloy (Mg, 3%Al, 1%Zn, 0.2%Mn) sheets (thickness 2 mm) in order to investigate the influence of a flame spray gun rapid preheating process on the microstructures and mechanical…

The microstructure, particle refinement and homogeneity of distribution of the refined particles during the friction stir processing (FSP) of AlSi alloys were investigated. A commercial hypo-eutectic LM24/A380 Al-8.9%Si gravity die cast alloy (26 mm…

The development of friction stir welding (FSW) technology for the Ariane 5 ME heavy launch vehicle project is illustrated with respect to the superior material properties of FSW within the parameter development and the manufacturing of circumferenti…

Dissimilar joints between an AA 5052 aluminium alloy sheet (thickness 1 mm) and an alumina plate (thickness 10 mm) were fabricated by friction stir spot welding (FSSW) and their microstructure and mechanical properties were investigated. Welding was…

An investigation is presented into bead-on-plate friction stir welding of type 304 austenitic stainless steel (18.1%Cr, 8.56%Ni) and the relationship between corrosion properties and weld microstructure. Microstructural observations were performed b…

A feasibility study is presented for the joining of mild steel plates (0.2%C, 0.11%Si, 0.63%Mn) of 12 mm in thickness by friction stir welding (FSW). Process optimisation using a combination of operating parameters and tool geometries is discussed, …

A thermomechanical finite element model of the friction stir welding process, which considered temperature distributions in the workpiece and tool loadings, was developed and validated by comparing the model simulations with experimental data for th…

A discussion is presented on the industrial use of the friction stir welding (FSW) process looking at cost issues and technological developments. The cost implications of introducing FSW into production areas and the calculation of returns on invest…

The forces exerted on the pin of a friction stir welding tool with a variable length pin (retractable pin-tool) were measured whilst welding aluminium alloy 2195 plate of 8.4 mm thickness, to develop a closed loop control system. Forces were measure…

The feasibility of friction stir welding steels was investigated using mild (low-carbon) steel plate (AISI-1010) of 6.4 mm (0.25 in) thickness. Temperature distributions were predicted using a simple thermal model. Tool wear was assessed by determin…

Microstructural evolution in friction stir welded commercially pure aluminium 1100-O plate was investigated. Plate of thickness 6.35 mm (0.25 in) was welded using rotational speeds of 700 and 1200 rpm, and welding speeds of 180 and 580 mm/min. The m…

3D fully-coupled thermomechanical models implemented in the ABAQUS finite element code were developed to investigate residual stresses and distortion in friction stir welding (FSW) and three case studies were examined. The temperature field obtained…

Friction stir welding (FSW) experiments were conducted on commercially pure titanium sheet (thickness 3 mm) to identify the optimum tool material and process conditions; the microstructure and mechanical properties of the welded joints were determin…

An experimental study was made of the effect of friction stir processing (FSP) and the influence of process parameters on the microstructure and mechanical properties of cast magnesium AZ91 alloy. FSP tests were conducted on die cast plates of 4 mm …

Dissimilar lap joints were fabricated between 6022 aluminium alloy and SPCC low carbon steel using friction stir welding (FSW) and the effect of probe tip position on microstructure and mechanical properties was investigated. FSW was performed at a …

The electrically assisted friction stir welding (EAFSW) technique, in which an electric current is fed through the workpiece to soften the metal by means of ohmic heating, is described and some trial experimental results are reported. The initial EA…

With regard to the application of wear resistant surface layers on chosen substrates, an investigation is presented into the deposition of cermet (WC, 10%Co, 4%Cr or Cr3C2-NiCr) and oxide (Al2O3) coatings onto AA 5083 aluminium alloy substrates by c…

A review is presented of the development of W, 25%Re friction stir welding (FSW) tool materials for application to steels and hard metals, such as titanium and nickel-based superalloys. Issues discussed include: the DUST (dual use science and techno…