Separations in steels subjected to controlled rolling, followed by accelerated cooling
- Authors: Farber V.M.1, Khotinov V.A.1, Belikov S.V.1, Selivanova O.V.1, Lezhnin N.V.2, Morozova A.N.1, Karabonalov M.S.1, Zhilyakov A.Y.1
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Affiliations:
- Ural Federal University
- Institute of Metal Physics, Ural Branch
- Issue: Vol 117, No 4 (2016)
- Pages: 407-421
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/166721
- DOI: https://doi.org/10.1134/S0031918X16040050
- ID: 166721
Cite item
Abstract
Zones on the fracture surfaces of Charpy specimens and profiles of the fractures of these specimens are examined using impact-bending tests carried out in the temperature range of +20 to–90°C and fractography. The specimens were cut out of hot-rolled plates produced from 05G2B super-low-carbon steels that contained Ti, Nb, V, and Cu microadditives using controlled rolling, followed by accelerated cooling. A detailed analysis of separations, including a study of the morphology, number, area of separations, and the surrounding stress-relaxation zones, and the structure of the walls, has allowed us to identify the mechanisms of the origination and growth of the separations. It has been found that the correlated changes in the length, width, and depth of the separations are accompanied by the formation and expansion of the stress-relaxation zones around the separations. The rate of expansion of the area of these zones is higher than that of the area of the separations, which favors the macroplastic fracture of the specimens.
About the authors
V. M. Farber
Ural Federal University
Email: khotinov@yandex.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002
V. A. Khotinov
Ural Federal University
Author for correspondence.
Email: khotinov@yandex.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002
S. V. Belikov
Ural Federal University
Email: khotinov@yandex.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002
O. V. Selivanova
Ural Federal University
Email: khotinov@yandex.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002
N. V. Lezhnin
Institute of Metal Physics, Ural Branch
Email: khotinov@yandex.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990
A. N. Morozova
Ural Federal University
Email: khotinov@yandex.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002
M. S. Karabonalov
Ural Federal University
Email: khotinov@yandex.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002
A. Yu. Zhilyakov
Ural Federal University
Email: khotinov@yandex.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002