Novel Solid State Cladding of Brass to Steel Plate by Friction Stir Welding

Abstract

To use brass as a tribological material instead of Pb bronze, the feasibility of forming a lap joint of brass sheet on steel plate was investigated by using Friction Stir Welding, and it was proved that a lap joint with smooth surface and good joint strength was successfully made. Furthermore, the mechanism taking place at the lap joint of brass to steel was discussed by observing the interface.

The Cu/Fe magnetic yoke with novel interface and excellent mechanical properties by friction stir welding

“…Moreover, we observed a unique phenomenon in which many Fe particles were distributed in the brass filler (Figure 6(d)), which helped optimise the joint's mechanical performance, which has not been observed or reported in previous studies [41-43]. The previous studies failed to obtain this interface because of the welding control method.…”

“…Moreover, the interfacial width in this study was orders of magnitude higher than previously reported lap-joined brass/Fe by FSW [41][42][43]. The previous studies reported that only a layer less than 100 nm could be formed at the interface, and the elemental distribution varied astonishingly within the interface.…”

“…As for the joining issue between Cu and Fe, the solute limit between them does not allow to form a reliable interface, which requires academic attention to build an effective joining method towards them. Several recent studies have reported the joining of dissimilar Cu/Fe alloys by FSW [41][42][43]. They indicated that the Cu/Fe interface formed by FSW has only a narrow thickness (< 100 nm) with a clear Cu/Fe boundary, which leads to insufficient load transfer during deformation, ultimately resulting in poor joint strength.…”