INFLUENCE OF INITIAL STRUCTURE ON STRESS-STRAIN CURVES OF MEDIUM-CARBON STEEL

1 Rusz Stanislav
Co-authors:
1 NĚMEC Josef 1 Schindler Ivo 1 Opěla Petr 2 SOLOWSKI Zdeněk
Institutions:
1 VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic, EU, stanislav.rusz2@vsb.cz, ivo.schindler@vsb.cz, petr.opela@vsb.cz
2 Třinecké železárny, a.s., Průmyslová 1000, 739 70 Třinec, Czech Republic, EU, zdenek.solowski@trz.cz
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
533-538
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
26 views / 14 downloads
Abstract

In this paper, influence of initial structure of C45 medium-carbon steel on the value of its flow stress was examined. The research was based on comparison of experimental stress-strain curves acquired using uniaxial compression tests of two initial structural states. Experimental labors were performed in the range of deformation temperatures of 900 °C – 1250 °C and strain rate range of 0.05 s−1 – 20 s−1. The values of the true (logarithmic) strain reached up to 1.0. The values of the hot deformation activation energy of both initial structure states were calculated and compared. The impact of the initial structure on the flow stresses of the surveyed carbon steel was confirmed.

Keywords: uniaxial compression test, flow stress, activation energy
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