Effect of explosive ratio on explosive welding quality of copper to aluminium

Loureiro, A.; Mendes, R.; Ribeiro, J.B.; Leal, R.M.

doi:10.1016/j.ctmat.2016.06.012

ISSN: 0870-8312

Ciência & Tecnologia dos Materiais is the official journal of SPM, the Portuguese Society of Materials (Sociedade Portuguesa de Materiais), providing a forum for publishing peer-reviewed papers related to both fundamentals of materials science and technological application of engineering materials. The scope of the journal covers a wide range of topics in materials science that are of interest to the SPM, encompassing electrochemistry, corrosion and protection of materials, extractive metallurgy and recycling, electronic and optoelectronic materials, biomaterials, forest materials, polymeric and composite materials, foundry, heat treatment and surface engineering, tribology, and fracture. Science and Technology of Materials welcomes contributions in the form of original research papers, review articles and technical notes reporting advances on those fields, emphasizing new materials, new products and devices, and new technologies.

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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 explosive ratio gives rise to an increase of the collision point velocity (Vc) and the impact velocity (Vp) and consequently reduces the thickness of the flying plate after welding as well as produces wavy interfaces of greater amplitude. Microstructural analysis showed the formation of hard and brittle intermetallic compounds in the interface region, more obvious in welds made with higher ratio of explosive.

Keywords:

Explosive welding

explosive ratio

copper

aluminium

intermetallic phases

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