Ultrafine grain structure of medium carbon steel prepared by HPT severe plastic deformation method

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F09%3A%230000189" target="_blank" >RIV/26316919:_____/09:#0000189 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Ultrafine grain structure of medium carbon steel prepared by HPT severe plastic deformation method
Original language description
The aim of this work is to evaluate the deformation process parameters of high pressure torsion and formation of ultrafine grained structurein medium carbon steel. Using the high pressure torsion deformation method at increased temperature the study of ultrafine grain structure formation in medium carbon steel was carried out with respect to introduced shear strain. The effect of different shear strain, varying across the deformed disc in time of torsion process, on microstructure evolution was investigated by TEM of thin foils. Microstructure analysis confirmed positional deformation heterogeneity in ultrafine grain structure formation across the disc due to the strain variation. Ultrafine grain structure was already formed at disc periphery performing the first turn. In central part of the disc, inexpressive deformation of ferrite and pearlite sructure was observed. Variatoin in mechanical properties can be related to the stress level and structure heterogeneity across the disc.
Czech name
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Czech description
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Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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