Abstract
In order to develop composite materials, new attempting was conducted. When an explosive is exploded in water, underwater shock wave is generated. Metal plate is accelerated by the underwater shock wave and collided with diamond particles at high velocity. In this paper, pure aluminum and magnesium alloy plates are used as matrix. Micro and nano sized diamond particles were used as reinforcement. Micro diamond particles were closely coated on metal surface. Some of micro diamond particles were penetrated into aluminum. Improvement of base metal property (wearing resistance) was verified by wear test for recovering metal plate. In order to confirm the deformation of the aluminum plate during the collision with diamond particles, simplified numerical simulation was conducted by using LS-DYNA software. From the result of numerical simulation, large deformation of aluminum and process of particle penetration were verified.
Highlights
In material processing using explosive, explosive welding [1] and explosive forming [2] have been industrialized
Some diamond particles penetrated into metal, composite layer is formed at closed metal surface
Micro diamond particles were coated on metal surface it is impossible to observe with naked eye
Summary
In material processing using explosive, explosive welding [1] and explosive forming [2] have been industrialized. Explosive powder compaction [3] and synthesis [4] have been researched by some authors. These techniques have possibility to make a new material and highly functional materials [5]. In order to recover large sized bulk composite, authors have investigated explosive powder compaction using underwater shock wave. Authors suggested explosive underwater shock wave method for material processing [6]. The method proposed here is to implant diamond particles on metal surface by using underwater shock wave. Some diamond particles penetrated into metal, composite layer is formed at closed metal surface. It is well known that producing an aluminum-diamond composite is very difficult through conventional materials processing technology, which uses heat-treatment, because of the reaction for making intermetallic like Al4C3. A new method to make a surface composite layer on a surface of a substrate plate is proposed and investigated through micro structural characterizations
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