Energy Dissipation and Instability Parameter at High Temperature Forming of Middle Carbon Steel

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F17%3A10238596" target="_blank" >RIV/61989100:27360/17:10238596 - 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
Energy Dissipation and Instability Parameter at High Temperature Forming of Middle Carbon Steel
Original language description
Deformation characteristics of carbon steel are studied in the temperature range 900-1200 °C and strain rates 0.1-100 s1 on the plastometr Gleeble using compression tests on cylindrical samples. Processed a single dissipation maps in the field of forming are developed on the basis of changes in the effectiveness of dissipation, depending on temperature and deformation resistance, taking into account the strain rate. Strass-strain curves under different deformation conditions were used. Map of absorption of energy reveals that peak efficiency of strain rate sensitivity parameter is achieved of m values of 0.21 and from that the energy dissipation efficiency η is calculated with purpose to find the optimal forming conditions. At the same time to the contour dissipation map, the map of an instability criterion ξ has been added. The instability forming mode is recorded lower values of ξ, in the present case, however, it is not a dramatic slump, only a warning on the possibility of defects. Behavior analysis indicated that there were a dynamic recrystallization at higher temperatures and in all conditions forming since the value 0.2 deformation (deformation at lower strain rates there) and always above 0.2 to 0.4 even at high strain rates.
Czech name
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Czech description
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Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
METAL 2017: conference proceedings : 26th International Conference on Metallurgy and Materials : (reviewed version) : May 24th-26th 2017, Hotel Voroněž I, Brno, Czech Republic, EU
ISBN
978-80-87294-79-6
ISSN
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e-ISSN
neuvedeno
Number of pages
5
Pages from-to
370-374
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
May 24, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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