Defect Structure Parameters of Deformed Polycrystals on Micro- and Mesolevel of Grain Sizes

Abstract:

In the paper we consider the size effect of the closed structural formations as the function of accumulation of scalar density dislocations and their components under plastic deformation. The focus is on the role of interfaces of different types. The sizes are determined and the various parameters of the structure defining the micro-and mesolevel are identified at the development of the mechanisms of plastic deformation. The role of statistically stored dislocations (SSD) and geometrically necessary dislocations (GND) in the formation of the defect structure of the material is examined. It has been established that the smaller the size of the closed structure, the greater the GND part and the smaller the SSD component. The work is based on the TEM research of the structure of deformed materials.

• Periodical: Advanced Materials Research (Volume 1013)
• Pages: 1-6
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1013.1
• Online since: October 2014
• Authors: Eduard Kozlov*, Natal'ya Popova, Marina Fedorischeva, Nina Koneva
• Keywords: Deformation, Dislocation Density, Geometrically Necessary Dislocations, Grain Size, Mesolevels, Micro-Level, Statistically Stored Dislocations, TEM

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