Influence of warm deformation on the formation of a fragmented structure in low-carbon martensitic steels
- Authors: Tabatchikova T.I.1, Yakovleva I.L.1, Delgado Reina S.Y.1, Plokhikh A.I.2, Ospennikova O.G.3, Gromov V.I.3
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Affiliations:
- Institute of Metal Physics, Ural Branch
- Bauman Moscow State Technical University
- All-Russia Institute of Aviation Materials (VIAM)
- Issue: Vol 117, No 1 (2016)
- Pages: 61-73
- Section: Structure, Phase Transformations, and Diffusion
- URL: https://journals.rcsi.science/0031-918X/article/view/166564
- DOI: https://doi.org/10.1134/S0031918X16010117
- ID: 166564
Cite item
Abstract
Methods of optical metallography and scanning and transmission electron microscopy were used to investigate the structure of low-carbon steels of martensitic classes VKS-7 and VKS-10 subjected to warm rolling or upsetting at temperatures of 600 and 700°C (in the α state) and 800°C (in the γ state). It has been shown that the deformation by rolling at 600°C to degrees of 40 and 60% does not lead to the destruction of the lath structure of the initial martensite; an increase in the rolling temperature to 700°C and of the degree of deformation to 80% favors the development of recrystallization in situ. It has been found that, upon warm deformation by upsetting, recrystallization occurs at lower temperatures than in the case of the warm rolling. It has been shown that warm deformation by upsetting at a temperature of 700°C leads to the formation of a fragmented structure with a high fraction of ultrafine grains with a size less than 2 μm.
About the authors
T. I. Tabatchikova
Institute of Metal Physics, Ural Branch
Author for correspondence.
Email: tabat@imp.uran.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990
I. L. Yakovleva
Institute of Metal Physics, Ural Branch
Email: tabat@imp.uran.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990
S. Yu. Delgado Reina
Institute of Metal Physics, Ural Branch
Email: tabat@imp.uran.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990
A. I. Plokhikh
Bauman Moscow State Technical University
Email: tabat@imp.uran.ru
Russian Federation, Vtoraya Baumanskaya ul. 5, str. 1, Moscow, 107005
O. G. Ospennikova
All-Russia Institute of Aviation Materials (VIAM)
Email: tabat@imp.uran.ru
Russian Federation, ul. Radio 17, Moscow, 105005
V. I. Gromov
All-Russia Institute of Aviation Materials (VIAM)
Email: tabat@imp.uran.ru
Russian Federation, ul. Radio 17, Moscow, 105005