8 documents found, page 1 of 1
Explosive welding of aluminium to stainless steel using carbon steel and niobiu...
Carvalho, Gustavo; Galvão, Ivan; Mendes, R.; Leal, R. M.; Loureiro, AltinoThis work aimed to study aluminium to stainless steel explosive welds produced using two different interlayers: carbon steel and niobium. The use of each interlayer was analysed and compared microstructurally and mechanically using many characterisation techniques. The final joints using both interlayers presented favourable interfacial microstructure: waves on both interfaces. However, the joint using the carb...
Explosive welding of aluminium to stainless steel using carbon steel and niobiu...
Carvalho, G.H.S.F.L.; Galvão, I.; Mendes, R.; Leal, R. M.; Loureiro, A.This work aimed to study aluminium to stainless steel explosive welds produced using two different interlayers: carbon steel and niobium. The use of each interlayer was analysed and compared microstructurally and mechanically using many characterisation techniques. The final joints using both interlayers presented favourable interfacial microstructure: waves on both interfaces. However, the joint using the carb...
Effect of the flyer material on the interface phenomena in aluminium and copper...
Carvalho, G.H.S.F.L.; Mendes, R.; Leal, R. M.; Galvão, I.; Loureiro, A.The effect of physical and mechanical properties of three different flyers on the interface phenomena of partially overlapped explosive welds, using the same base plate material, was studied. Flyers of Copper Cu-DHP and aluminium alloy 6082 (tempers T6 and O) were welded to AA6082-T6 base plates. The morphology of the weld interface is strongly influenced by the physical and mechanical properties of the flyer. ...
Effect of explosive ratio on explosive welding quality of copper to aluminium
Loureiro, A.; Mendes, R.; Ribeiro, J. B.; Leal, R. M.The goal of this research is to study the influence of the ratio of an explosive composed of 80% ANFO and 20% matrix on the quality of dissimilar explosive welds of Cu-DHP copper to aluminium alloy 5083-H11, in flat configuration. It is analysed the influence of four explosive ratios (1.4, 1.8, 2.3 and 2.6) on the microstructure and mechanical properties of welds. It was observed that the increase in the explos...
Effect of explosive mixture on quality of explosive welds of copper to aluminium
Loureiro, A.; Mendes, R.; Ribeiro, J. B.; Leal, R. M.; Galvão, IvanThe aim of this research is to investigate the influence of explosive ratio and type of sensitizer on the quality of explosive welds between copper and aluminium alloy plates. The welds were performed on a partially overlapping joint configuration using an emulsion explosive (EE) with two different sensitizers, hollow glass microspheres (HGMS) and expanded polystyrene spheres (EPS). Welds with an improved surfa...
Influence of tool shoulder geometry on properties of friction stir welds in thi...
Galvão, I.; Leal, R. M.; Rodrigues, D. M.; Loureiro, A.The aim of this work is to study the influence of the shoulder geometry on friction stir welding of 1 mm-thick copper-DHP plates. The welds were produced using three different shoulder geometries, flat, conical and scrolled, and varying the rotation and traverse speeds of the tool. The flat shoulder tool proved to be inadequate for performing welds, because many defects were produced for all welding conditions....
Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin f...
Leitão, C.; Leal, R. M.; Rodrigues, D. M.; Loureiro, A.; Vilaça, P.The tensile behaviour of similar and dissimilar friction stir welds in 1Â mm thick sheets of two aluminium alloys (AA5182-H111 and AA6016-T4) is analysed in this paper. The heterogeneity in properties across the welds was studied by performing microhardness tests and microstructural analysis. The tensile tests were performed in samples extracted longitudinal and transverse to the weld direction. It was found th...
Material flow in heterogeneous friction stir welding of thin aluminium sheets: ...
Leal, R. M.; Leitão, C.; Loureiro, A.; Rodrigues, D. M.; Vilaça, P.http://www.sciencedirect.com/science/article/B6TXD-4T8HHG4-4/2/0b8e12809caaa618052d7b27494c16ac