Hardening Mechanism in Low-Carbon Low-Alloy Steels with a Simultaneous Increase in Ductility and Fracture Toughness
| Autor: | V. E. Panin, N. K. Galchenko, P. V. Kuznetsov |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Angular momentum Materials science Bainite Alloy Doping Nucleation 02 engineering and technology Surfaces and Interfaces engineering.material Condensed Matter Physics Curvature 01 natural sciences 020303 mechanical engineering & transports Fracture toughness 0203 mechanical engineering Mechanics of Materials 0103 physical sciences engineering Hardening (metallurgy) General Materials Science Composite material |
| Zdroj: | Physical Mesomechanics. 23:347-353 |
| ISSN: | 1990-5424 1029-9599 |
| DOI: | 10.1134/s1029959920040098 |
| Popis: | The paper analyzes the nucleation and growth of bainite in low-carbon low-alloy 09Mn2Si steel doped with titanium carbonitride nanoparticles in impact toughness testing. The analysis shows that such particles segregate at low-angle boundaries, retarding the formation of high-angle ones, and when impacted into the steel, they curve the lattice and generate a new bainite phase at the curvature interstices. The mechanism of bainite nucleation and growth is sympathetic, obeys the angular momentum conservation law, and provides the formation of multilayered packets of bainite plates capable for unlimited thinning to sub-sub-subunits during deformation. Such bainite plates can respond to their stress-strain state by one or another rotation, showing a high relaxation capacity and providing a high impact toughness of the steel at low temperatures. |
| Databáze: | OpenAIRE |
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