TWI

Friction stir welding experiments were undertaken on Al-Li alloys for application to C919 passenger aircraft fuselage panels, and the microstructure and mechanical properties of the welded lap joints were investigated. The materials comprised 2060-T…

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…

Friction stir welding (FSW) experiments were undertaken on AA 5083 aluminium alloys to investigate the influence of process parameters (rotational and travel speeds) and preheating temperature on abnormal grain growth after PWHT. The experimental sp…

WC, 12%Co cemented carbide layers were deposited onto M2 tool steel (0.8-0.88%C, 3.8-4.5%Cr, 4.7-5.2%Mo, 5.9-6.7%W, 1.7-2.1%V) substrates by HVOF spraying and the effect of subsequent friction stir processing (FSP) on bonding strength and cermet coa…

Dissimilar lap joints between 2024-T3 aluminium alloy (Al, 4.6%Cu, 1.3%Mg, 0.56%Mn) and Ti-6Al-4V titanium alloy (Ti, 6.21%Al, 3.99%V) were fabricated by friction stir welding (FSW) and the influence of process parameters on hook shape and surface r…

The use of semi-friction stir processing to improve the facing surface layer of flange joints in casings of high-voltage switchgears, filled with electro-insulating SF6 gas, was examined. The influence of tool shape and size, and welding parameters …

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…

A geometric feature, termed the "Wiper", was developed to improve the weld track surface finish produced by friction stir welding (FSW) and processing tools with scrolled shoulders, and experiments were undertaken to investigate the influence of "Wi…

An experimental investigation was undertaken to study the effects of different pin profiles (threaded conical, square, pentagon and hexagon) and the same process parameters on temperature distribution around the tool and resulting microstructure dur…