- Tytuł:
- 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. - Powiązania:
- https://bibliotekanauki.pl/articles/354445.pdf
- Data publikacji:
- 2018
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
initial austenition grain size
peak stress
peak strain
Mn-Ti-B steel - Opis:
- 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.
- Źródło:
-
Archives of Metallurgy and Materials; 2018, 63, 4; 1785-1792
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł