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Open AccessArticle

Explosive Welding of Thin Aluminum Plate onto Magnesium Alloy Plate Using a Gelatin Layer as a Pressure-Transmitting Medium

1
Faculty of Engineering, Kumamoto University, Kumamoto 860-8555, Japan
2
Department of Mechanical Engineering, Sojo University, Kumamoto 860-0082, Japan
3
Institute of Pulsed Power Science, Kumamoto University, Kumamoto 860-8555, Japan
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 106; https://doi.org/10.3390/met10010106
Received: 7 November 2019 / Revised: 31 December 2019 / Accepted: 7 January 2020 / Published: 9 January 2020
(This article belongs to the Special Issue Impact Welding of Materials)
Mg alloys are extensively used in various automotive, aerospace, and industrial applications. Their limited corrosion resistance can be enhanced by welding a thin Al plate onto the alloy surface. In this study, we perform the explosive welding of a thin Al plate, accelerated by the detonation of an explosive through a gelatin layer as a pressure-transmitting medium, onto two Mg alloy samples: Mg96Zn2Y2 alloy containing a long-period stacking ordered phase in an α-Mg matrix and commercial AZ31. The bonding interface is characterized using optical microscopy, scanning electron microscopy, X-ray diffraction, and electron probe microanalysis. Under moderate experimental conditions, the thin Al plates are successfully welded onto the Mg alloys, showing typical wavy interfaces without intermediate layers. Due to the decreased energetic condition corresponding to the use of a thin flyer plate and gelatin medium, the resulting bonding quality is better than that obtained using a regular explosive welding technique. Further, based on the well-known window for explosive welding, we estimate that the experimental conditions for successful bonding are close to the lower welding limit for a thin Al plate with the two Mg alloys considered. These findings may contribute to improving the quality of materials welded with explosive welding. View Full-Text
Keywords: explosive welding; gelatin; thin aluminum plate; magnesium alloys; LPSO phase explosive welding; gelatin; thin aluminum plate; magnesium alloys; LPSO phase
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MDPI and ACS Style

Inao, D.; Mori, A.; Tanaka, S.; Hokamoto, K. Explosive Welding of Thin Aluminum Plate onto Magnesium Alloy Plate Using a Gelatin Layer as a Pressure-Transmitting Medium. Metals 2020, 10, 106.

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