Joining dissimilar materials by explosion welding
Ivan Galvão
ISEL - Polytechnic University of LisbonDepartment of Mechanical Engineering
Outline
Dissimilar welding
Quiz
Explosion welding
Dissimilar welding
New engineering solutions combining the specific properties of different materials
Explosion welding
Aluminium-Aluminium
(see next couple)
Copper-Copper
(see next couple)
Aluminium-Copper
(see next couple)
Copper-Aluminium
(see next couple)
Copper-Stainless steel
(see next couple)
Aluminium-Carbon steel-Stainless steel
(see next couple)
Aluminium-Niobium-Stainless steel
Quiz
Explosion welding
Explosive welding is a solid-state welding process of great potential for joining dissimilar material combinations with extremely different physical properties.
ISEL - Lisbon School of Engineering
The Lisbon School of Engineering (ISEL) sits at a large campus in a privileged area of Lisbon, 5 minutes away from Bela Vista Park, Parque das Nações and the airport, with bus stops and an underground station (Chelas) on its doorstep.
Address Instituto Superior de Engenharia de Lisboa Rua Conselheiro Emídio Navarro, 1 1959-007 Lisboa
Contacts isel@isel.pt (+351) 218 317 000
ISEL - Lisbon School of Engineering
www.isel.pt
Localised molten zones
Although explosion welding is a solid-state welding process, there is formation of localised molten zones at the weld interface. The zones correspond to vortex regions, in which peaks in temperature and strain are reached during the process.
Morphology of the interface
The morphology of the weld interface, besides depending on the welding parameters, also depends on the materials to be welded and their relative position in the joint. For example:
Aluminium-copper: Wavy interface
Copper-aluminium: Flat interface
Joining dissimilar materials by solid-state welding
Ivan Galvão
Created on October 4, 2025
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Transcript
Joining dissimilar materials by explosion welding
Ivan Galvão
ISEL - Polytechnic University of LisbonDepartment of Mechanical Engineering
Outline
Dissimilar welding
Quiz
Explosion welding
Dissimilar welding
New engineering solutions combining the specific properties of different materials
Explosion welding
Aluminium-Aluminium
(see next couple)
Copper-Copper
(see next couple)
Aluminium-Copper
(see next couple)
Copper-Aluminium
(see next couple)
Copper-Stainless steel
(see next couple)
Aluminium-Carbon steel-Stainless steel
(see next couple)
Aluminium-Niobium-Stainless steel
Quiz
Explosion welding
Explosive welding is a solid-state welding process of great potential for joining dissimilar material combinations with extremely different physical properties.
ISEL - Lisbon School of Engineering
The Lisbon School of Engineering (ISEL) sits at a large campus in a privileged area of Lisbon, 5 minutes away from Bela Vista Park, Parque das Nações and the airport, with bus stops and an underground station (Chelas) on its doorstep.
Address Instituto Superior de Engenharia de Lisboa Rua Conselheiro Emídio Navarro, 1 1959-007 Lisboa Contacts isel@isel.pt (+351) 218 317 000
ISEL - Lisbon School of Engineering
www.isel.pt
Localised molten zones
Although explosion welding is a solid-state welding process, there is formation of localised molten zones at the weld interface. The zones correspond to vortex regions, in which peaks in temperature and strain are reached during the process.
Morphology of the interface
The morphology of the weld interface, besides depending on the welding parameters, also depends on the materials to be welded and their relative position in the joint. For example:
Aluminium-copper: Wavy interface
Copper-aluminium: Flat interface