Geometrically Necessary Dislocations in Deformed Martensitic Steel

Abstract:

Effect of a size of closed structural formation on accumulation of dislocation density and its components at plastic deformation is studied. Main attention is given to a role of a division of boundaries of a different type. Structural formation sizes are determined and different parameters of structure defining micro-and mezolevel at development of plastic deformation mechanisms are distinguished. A role of statistically stored dislocations (SSD) and geometrically necessary dislocations (GND) for defect structure formation of a material is examined. It is determined that than a size of closed structural formation is less than that a component of GND is larger and component of SSD is less. The work is based on results of TEM reserches of a structure of deformed materials.

• Periodical: Advanced Materials Research (Volume 1013)
• Pages: 23-30
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1013.23
• Online since: October 2014
• Authors: Nina Koneva*, Natal'ya Popova, Marina Fedorischeva, Eduard Kozlov
• Keywords: Deformation, Dislocation Density, Geometrically Necessary Dislocations, Grain Size, Mezolevel, Micro-Level, Statistically Stored Dislocations, TEM

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