Phase Composition and Defect Substructure of Strengthening Layer Surfaced on Low Alloyed Steel

The microstructure and microhardness distribution in surface of low carbon Hardox 450 steel coated with alloyed powder wires of different chemical compositions are studied. It is shown that the microhardness of 6-8 mm thickness surfaced layer exceeds that of base metal by more than 2 times. The increased mechanical properties of surfaced layer are caused by the submicro and nanoscale dispersed martensite, containing the niobium carbides Nb2C, NbC and iron borides Fe2B. In the bulk plates a dislocation substructure of the net-like type with scalar islocation density of 10^11 cm^-2 is observed. The layer surfaced with the wire containing B possesses the highest hardness. The possible mechanisms of niobium and boron carbides formation in surfacing are discusse

The possibilities of the Internet in the formation of a healthy lifestyle of young generation

The article analyzes the role of the Internet in the lives of younger generation. In the course of the study revealed the influence of social networks on the formation of the needs of young people in physical culture and sportsВ статье проанализирована роль интернета в жизни современного молодого поколения. В ходе проведенного исследования выявлено влияние социальных сетей на формирование потребности молодежи в занятиях физической культуры и спорто