Determination of the hot deformation activation energy and flow stress course of the AISI 4140 steel

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F19%3A10243686" target="_blank" >RIV/61989100:27360/19:10243686 - 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
Determination of the hot deformation activation energy and flow stress course of the AISI 4140 steel
Original language description
The paper deals with the possibilities of the determination of the hot deformation activation energy and the flow stress course at hot forming conditions. By means of the Gleeble 3800 plastometer, the set of uniaxial compression tests has been carried out for the AISI 4140 steel. The tests were carried out within the temperature range of 850 - 1 250 oC and the strain rate range of 0.1 - 50 s-1 when the strain reached up to 1.0. From the obtained stress - strain curves the values of peak stress were determined and subsequently used to determine the value of the activation energy at hot forming according to the classical equation of the hyperbolic-sine type. Enumeration of its coefficients allow at the same time to predict the maximum flow-stress values of the investigated steel in dependence on the temperature and strain rate. The value of the activation energy has been used to assembly the mathematical models which allow to describe the flow stress course and the kinetics of the dynamic recrystallization of this steel at hot-forming conditions. By this way obtained results have been compared with the previously examined steel of the grade of AISI 4130.
Czech name
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Czech description
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Project
<a href="/en/project/EF17_049%2F0008399" target="_blank" >EF17_049/0008399: Development of inter-sector cooperation of RMSTC with the application sphere in the field of advanced research and innovations of classical metal materials and technologies using modelling methods</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
METAL 2019 : conference proceedings : peer reviewed : 28th International Conference on Metallurgy and Materials : May 22nd-24th 2019, Hotel Voronez I, Brno, Czech Republic, EU
ISBN
978-80-87294-92-5
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
467-472
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
May 22, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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