A new method for explosive welding of Al/ZrO2 joint using regulated underwater shock wave

Hokamoto, Kazuyuki; Fujita, Masahiro; Shimokawa, Hanae; Okugawa, H

doi:10.1016/s0924-0136(98)00286-6

Cited by 62 publications

(29 citation statements)

References 2 publications

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“…[1][2][3][4][5][6][7][8] The welding interface exhibits characteristic wavy morphology. 4,[6][7][8] Such an interfacial morphology is similar to those of explosive welding, [9][10][11][12] water jet spot welding 13,14) and gas-gun impact welding. 15,16) For the explosive welding, a number of studies were performed in order to examine the mutual relationship among interfacial morphology, collision velocity of the flyer plate and collision angle of the plate surfaces.…”

Section: Introductionmentioning

confidence: 75%

Interfacial Morphology of Magnetic Pulse Welded Aluminum/Aluminum and Copper/Copper Lap Joints

Watanabe

Kumai

2009

Mater. Trans.

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In order to investigate interfacial morphology and their welding condition dependency, Al/Al and Cu/Cu lap joints were fabricated by magnetic pulse welding under various discharge energies. A part of flyer plate along the longitudinal direction of the coil bulged toward a parent plate and hit the parent plate. Two parallel seam-welded areas were formed along the side edges of coil, but the area between them was left unwelded. The welding interface exhibited characteristic wavy morphology, which was similar to that of explosive welding. Wavelength and amplitude of the interfacial wave were not uniform, but gradually changed through the interface. In addition, the maximum wavelength and amplitude increased with increasing discharge energy. Both macro-and microscopic features of interfacial morphology are considered to be due to the oblique collision behavior between the plates, in which traveling velocity, collision angle and collision pressure of the plates gradually change during the welding for a few microseconds.

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Section: Introductionmentioning

confidence: 75%

Interfacial Morphology of Magnetic Pulse Welded Aluminum/Aluminum and Copper/Copper Lap Joints

Watanabe

Kumai

2009

Mater. Trans.

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“…A schematic diagram of the system is shown in Figure 4b. respectively, on Al/ZrO 2 underwater explosive welding [12]. In view of this, four kinds of explosives with a mean detonation velocity of 6890 m·s −1 were adopted in our experiments.…”

Section: Interior Explosive Welding Systemmentioning

confidence: 99%

Study on Underwater Explosive Welding of Al-Steel Coaxial Pipes

Zhao

et al. 2017

Cent. Eur. J. Energ. Mater.

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Abstract:In order to solve the aluminum surface ablation issue of Al-Steel bimetallic pipes manufactured by the explosive welding technique, a novel explosive welding system has been designed to weld Al-Steel coaxial pipes. The stand-off distance was chosen according to an empirical formula. A special Explosive Cord with an aluminum coating was used as the explosive. Four experiments were performed using Explosive Cords 1, 2, 3 and 4, respectively. In each experiment, three reliable PVDF (Polyvinylidene Fluoride) piezoelectric film sensors were used to sample the impact pressure between the parent pipe and the flyer pipe along the detonation direction. p-t Curves were obtained at different points on the bimetallic pipe manufactured by Explosive Cord 1. In order to observe the inner surface and to judge the bonding interface, specimens were cut along the axial direction. BSE (Backscattering Electron) images of the interfaces were obtained. According to these pictures from all of the specimens cut along the axial direction, the surface ablation phenomenon has disappeared. The bimetallic pipe manufactured by the new welding system using Explosive Cord 3 has an irregular wavy interface, between micro and small wavy interface, which is one of the best bonding forms.

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“…When the initial setup angle of explosive is 20 , the velocity Vc for the SEP explosive is estimated to be about 3.5 km/s, which is lower than the elastic wave velocity of common materials. 6) The initial setup angle should in general be higher than 10 for common materials.…”

Section: Evaluation Of Underwater Shock Waves and The Conditions Of Ementioning

confidence: 99%

Basic Characteristics of the Explosive Welding Technique Using Underwater Shock Wave and Its Possibilities

Hokamoto

Ujimoto²,

Fujita

2004

Mater. Trans.

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A novel explosive welding technique which uses underwater shock waves to weld thin sheets and the technical advantages of this technique are reported. Using this technique, a thin metal plate is uniformly accelerated by underwater shock waves. The initial angle of inclination of the explosive pack is determinant in high-explosive welding systems, with respect to decreasing the horizontal collision velocity. Any change in the welding conditions along the cladding plates influences the weld strength and, therefore, the parameters should be judiciously selected so as to lie within the weldability boundary. The size of the waves generated at the welded interface is discussed based on the angle of collision. Future applications for multilayered explosive welding are also suggested.

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A new method for explosive welding of Al/ZrO2 joint using regulated underwater shock wave

Cited by 62 publications

References 2 publications

Interfacial Morphology of Magnetic Pulse Welded Aluminum/Aluminum and Copper/Copper Lap Joints

Interfacial Morphology of Magnetic Pulse Welded Aluminum/Aluminum and Copper/Copper Lap Joints

Study on Underwater Explosive Welding of Al-Steel Coaxial Pipes

Basic Characteristics of the Explosive Welding Technique Using Underwater Shock Wave and Its Possibilities

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