Welding surround structures of aluminum alloys nanopowder electrodes with a fibrous structure

In 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...