Comparative study of energy distribution and interface morphology in parallel and double vertical explosive welding by numerical simulations and experiments

• Published in: Materials & design Vol. 195; p. 109027
• Main Authors: Sun, Zerui, Shi, Changgen, Shi, Hang, Li, Feng, Gao, Li, Wang, Guangzheng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2020; Elsevier
• Subjects: Energy calculation; Explosive welding; Interface morphology; Numerical simulation; Parameter analysis; SPH method; Energy calculation; Numerical simulation; SPH method; Explosive welding; Parameter analysis; Interface morphology
• ISSN: 0264-1275; 1873-4197
• DOI: 10.1016/j.matdes.2020.109027

Different from the traditional parallel method, double vertical explosive welding adopts a closed charge structure, and two composite plates are formed by one explosion. The energy distribution and interface morphology in the parallel methods and double methods were studied by numerical simulation and experiments. The theory of “energy flow in stages during explosive welding” was first proposed and energy balances at the start and end welding were obtained in this paper. The temporal and spatial distribution of the relevant parameters was analyzed. The value and proportion of each energy were calculated in sections by numerical simulation. The results showed that the detonation products in double method had higher internal energy and lower kinetic energy. The collision velocity obtained by the two methods was close. The kinetic energy of the flyer plate, plastic deformation energy and jet energy in the double method were about twice those in the parallel method. The experimental results showed that the dimension of the interface waves in two methods was close, but more melted microstructures were observed in the double method, whose compositions were mainly TiFe2 and TiFe3. Double vertical explosive welding improved energy efficiency and saved at least half of the explosives. [Display omitted] •Explosive welding was divided into three stages: explosive driving flyer plate, collision welding and stabilization stage.•The detonation products in double vertical explosive welding had higher internal energy and lower kinetic energy.•The kinetic energy of flyer plates, plastic deformation energy and jet energy were twice as much as those of parallel method.•The dimension of interface waves obtained by two methods was close under the mass ratio=2.47.•The double method increased energy efficiency and saved at least half of the explosives.