Russian scientists from the "Institute of Theoretical and Applied Mechanics. Khristianovich Siberian Branch of the Russian Academy of Sciences" found a way to solve the longstanding problem of aircraft — aircraft parts welding, using laser and nanotechnology.
It’s hard to believe, but even the most modern Boeing and Airbus still riveting. Since the housing liner can count to 30 million rivets. However, current technology can not yet replace the time-consuming operation.
Initially, the problem in the metal from which the building airplanes — titanium, chief aviation material. Titanium is stronger and lighter than steel, but very moody: virtually impossible to weld. As a result, the welding seams out very fragile, brittle.
"Usually when welding titanium produced large dendritic (tree-like) structure, weak links between them, so the seam becomes brittle. This all changed when we added in the joint special ceramic nanoparticles. As they melt mixed with metal and become the centers of crystallization. As a result, instead of large dendrites formed small that at times increases the strength of the bond, "- said the deputy director of the Institute of Theoretical and Applied Mechanics, Russian Academy of Sciences Anatoly Orishich.
The know-how of Novosibirsk scientists not only in nanopowders, the regime itself is important and laser welding. It provides a "knife-like" material penetration into the seam. Scientists first time succeeded in welding seam strength of titanium is the same as that of the metal itself. And then they are combined with titanium steel. And have gained a strong seam than both of its components.