TWI Digital Library

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…

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…

This study investigates the impact of process parameters on FSW of AISI 304 stainless steel hemispheres of various diameters without internal support. Optical microscopy was employed to investigate joint macrostructure, defect formation, and weld pe…

Corner "Friction Stir Welding" technology is beneficial for T-joints in a variety of products, including aluminum aircraft. Although a stationary shoulder device and Corner Stationary Shoulder FSW (CSS-FSW) are promising technology to realize T-join…

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…

Friction stir processing (FSP) experiments were undertaken on annealed AISI 420 stainless steel plates (thickness 6 mm) in order to compare three methods for assessing tool wear. The investigations incorporated two tool compositions (WC-Co or polycr…

In relation to the potential of force control friction stir welding (FSW) to produce higher quality weldments, an investigation is presented into the integration of closed-loop force control onto milling machines using popular CNC control systems, f…

An investigation was undertaken to examine the effect of adding aluminium to magnesium on the strength of dissimilar joints between steel and magnesium fabricated by friction stir welding. The materials studied were pure 3N magnesium, AZ31 (Mg, 2.9%…

With regard to the requirement to produce friction stir welded (FSW) lap joints with strength and fatigue properties suitable for commercial regional aircraft, work undertaken by MTS Systems and Bombardier Aerospace to develop pin tools and corrosio…

Friction stir welding (FSW) was employed to weld Mo and Ti sheets (thickness 1.5 and 2 mm, respectively), the effects of process conditions on weldability as well as mechanical properties and microstructure of joints was investigated, and the import…

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 report is presented into recent advances made in friction stir welding (FSW) of 7075 aluminium alloy and 12%Cr alloy steel plates (thickness 12 mm) using refractory metal tools in conjunction with a variety of surface modifications, including stud…

The degradation mechanisms of friction stir welding (FSW) tools made of three tungsten alloys were investigated. Tools were made from 99%W-1%La2O3, 75%W-25%Re and 70%W-20%Re-10%HfC. These were used to make friction stir welds in high strength steel …

The viscoplastic behaviour of two aluminium alloys (non heat-treatable AA5083-H111 and heat-treatable AA6082-T6) was analysed by performing tensile tests at different temperatures and strain rates and the friction stir weldability of the materials i…

The hybrid component of the combination magnesium’s lightness and aluminum’s formability should be useful for energy saving. The welding of dissimilar metallic materials is difficult for their difference in melting temperatures and the formation of …

Friction stir processing (FSP) was employed to fabricate oxide dispersion strengthened copper-based composite plates with a graded microstructure and evolving mechanical, thermal, electrical and wear properties along their thickness. Specimens compr…

The effect of tool pin displacement on defect formation in friction stir welded (FSW) 5052 Al alloy and C11000 copper in butt joint configurations was investigated, with the tool pin plunged first in copper, secondly at the weld joint centre line an…

The detection principles of 3D forces during bobbin tool friction stir welding (BT-FSW) were considered and the filtered data of axial force, tool torque and horizontal force were analysed to develop models to describe the relationships between torq…

A Taguchi design of experiments approach was employed to investigate the effect of varying process parameters (rotational speed, welding time and plunge depth) on process data for refill friction stir spot welding of AA 6082-T6 aluminium alloys. The…