TitleWelding surround structures of aluminum alloys nanopowder electrodes with a fibrous structure
Authors1,2G.G. Krushenko, 2G.V. Dvirniy, 2S.N. Reshetnikova
Organizations1Institute Computational Modeling SB RAS
Krasnoyarsk, Russian Federation
2Reshetnev Siberian State Aerospace University
Krasnoyarsk, Russian Federation
AbstractIn the manufacture of aircraft structures made of aluminum alloys used welding, physical essence of which is to obtain a permanent connection by melting and co-crystallization of the welding electrode materials and parts to be joined. While the structure of the weld and the joined parts of the influence of heat coarsened, which leads to a reduction in the mechanical properties of the welded articles. It is known that metal with fine-grained structure have higher mechanical properties compared with coarse. Thus in practice, for the purpose of foundry castings structure refinement is used modification, the essence of which consists in introducing into the liquid metal alloys using substances which serve as crystallization centers. However, the possibility of modifying such agents have reached the limits in recent years and have found a new method of modifying the application using nanopowders (NP) chemical compounds (nitrides, carbides, borides, oxides), which gives a high effect of enhancing the mechanical properties of the molded articles. Bearing in mind the fact that the mechanism of crystallization of molded articles and weld identical technology modifying liquid alloy used to grind the weld structure in the manufacture of a welded structure of the aircraft from the example sheets of aluminum-magnesium alloy AMg6 with welding rods containing NP. The test results are cut from the welded structure samples showed that σв metal at the weld joint during the welding rod comprising NP were higher than the samples have AMg6 alloy, welded by the standard electrode of the same alloy.
Keywordsaircraft, aluminum alloys, welding
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