Influence of Heating Parameters on Flow Stress Curves of Low-Alloy Mn-Ti-B Steel

• Autorzy: Kawulok P. , Schindler I. , Kawulok R. , Opěla P. , Sedláček R.

Identyfikatory

DOI

10.24425/amm.2018.125105

• Języki publikacji: EN

Abstrakty

EN

Influence of the initial grain size on hot deformation behavior of the low-alloy Mn-Ti-B steel was investigated. The uniaxial compression tests were performed in range of the deformation temperatures of 900-1200°C and strain rates of 0.1-10 s^-1. One set of samples was heated directly to the deformation temperature, which corresponded to the initial austenitic grain size of 19-56 μm; the other set of samples was uniformly preheated at the temperature of 1200°C. Whereas the values of activation energy, peak stress and steady-state stress values practically did not depend on the initial austenitic grain size, the peak strain values of coarser-grained structure significantly increase mainly at high values of the Zener-Hollomon parameter. This confirms the negative effect of the large size of the initial grain on the dynamic recrystallization kinetics, which can be explained by the reduction in nucleation density.

Słowa kluczowe

EN

initial austenition grain size; peak stress; peak strain; Mn-Ti-B steel

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 4
• Strony: 1785--1792
• Opis fizyczny: Bibliogr. 34 poz., fot., rys., tab., wzory

Twórcy

autor

Kawulok P.

• VSB-Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. Listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic

autor

Schindler I.

• VSB-Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. Listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic

autor

Kawulok R.

• VSB-Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. Listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic

autor

Opěla P.

• VSB-Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. Listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic

autor

Sedláček R.

• Ostroj A. S., Těšínská 1586/66, 74641 Opava, Czech Republic

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Uwagi

EN

1. This paper was created at the Faculty of Metallurgy and Materials Engineering within the Project No. LO1203 “Regional Materials Science and Technology Centre – Feasibility Program” funded by the Ministry of Education, Youth and Sports of the Czech Republic; and within the students’ grant project SP2018/105 supported at the VŠB–TU Ostrava by the Ministry of Education, Youth and Sports of the Czech Republic.

2. Błąd w numeracji bibliografii - brak pozycji 23.