TWI Digital Library

An experimental investigation was undertaken to examine the effect of a TIG welding torch assisted heating source on the microstructure, mechanical properties and fracture mechanism of dissimilar Cu/austenitic stainless steel butt joints fabricated …

The distortion, mechanical properties and microstructure of friction stir, submerged arc and GMA welds in HSLA-65 steel (0.09%C, 1.32-1.39%Mn, 0.01-0.06%Ni, 0.041-0.067%V, 0.03-0.035%Nb) and DH-36 steel (0.18%C, 0.90-1.60%Mn, 0.25%Cr, 0.40%Ni, 0.08%…

Friction stir welding was employed to fabricate bead-on-plate welds on AA 6063 aluminium alloy sheets (thickness 5 mm) and dissimilar joints between AA 6063 and S45C carbon steel plates (thickness 6 mm), and the influence of weld shape on microstruc…

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 …

With regard to the capability of ultrasonic vibration enhanced friction stir welding (UVeFSW) to improve weld formation quality as well as the microstructure and mechanical properties of the welded joints, experiments were undertaken to clarify the …

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…

An experimental investigation is presented into the fatigue properties of welded joints made by friction stir welding (FSW) of 2024-T4 (Al, 4.4%Cu, 0.6%Mn, 1.5%Mg) and 2014-T6 (Al, 4.5%Cu, 0.8%Mn, 0.5%Mg) aircraft alloys and their dependence on proc…

Microstructure observations and bending tests were employed to investigate the basal plane texture and room temperature formability of AZ31 magnesium alloy rolled and extruded sheets (thickness 3 mm) treated by friction stir processing (FSP). Overla…

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 influence of welding tool design on the microstructure of the interface and friction stir spot welded joint between aluminium alloy and low carbon steel was investigated. Two types of welding tool were evaluated: a tool comprising a probe and sh…

Friction stir spot welding experiments were conducted in a cross-tension configuration on automotive grade A 6002-T4 sheets (thickness 1 mm) and the effect of pin and shoulder geometry on welded joint static strength was investigated. The welding pa…

This study explores the microstructural evolution of AA6060 builds that were fabricated via the recently developed Friction Screw Extrusion Additive Manufacturing (FSEAM) approach, and the role of a subsequent post-manufacturing ageing heat treatmen…

The optimal conditions for the friction stir welding of high-N-containing austenitic stainless steel were evaluated. The influence of heat input (welding speed (50-400 mm/min)) on the surface appearance, macrostructure, microstructure, hardness, yie…

FSSW has been performed in two different automotive 1.5 mm-thick aluminium alloys– AA5754-H22 and AA6082-T6 in similar and dissimilar combination using different joining parameters (e.g. plunge rate, rotational speed and dwell time). Plunge depth ha…

An empirical process model to estimate tool shoulder temperature for different materials and friction stir welding (FSW) conditions is described that incorporates a design of experiments method and linear regression analysis (MATLAB software) with c…

With regard to inconsistencies in the literature concerning the correlation between friction stir welding (FSW) process inputs and post weld process or material response, an investigation is presented into the primary variables (temperature, cooling…

The microstructures and strengthening mechanisms during friction stir processing (FSP) of AZ91 (Mg, 9%Al, 1%Zn) die-cast and Mg-Y-Zn (Mg, 5.9%Y, 2.6%Zn and Mg, 5.5%Y, 4.3%Zn) cast alloys were investigated and the effect of second phase particle disp…

With regard to the occurrence of coarse alpha-Al dendrites, eutectic phase, shrinkage porosity and other defects in cast aluminium alloys, an investigation was undertaken into the influence of different combinations of friction stir processing (FSP)…

Friction stir processing (FSP) experiments were undertaken on 7B04-O aluminium alloys (Al, 6.23%Zn, 2.88%Mg, 1.58%Cu) and the evolution of microstructure and mechanical properties in the stir zone was investigated. FSP was conducted using a tool mad…

Butt joints were fabricated between A6063 aluminium alloys and S45C mild steel by friction stir welding (FSW) and the effect of material flow on the weld interface formation was investigated using the stop action technique. FSW experiments were unde…