Structure formation in grade 20 steel during equal-channel angular pressing and subsequent heating
- 作者: Dobatkin S.1,2, Odesskii P.3, Raab G.4, Tyutin M.1, Rybalchenko O.1,2
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隶属关系:
- Baikov Institute of Metallurgy and Materials Science
- Laboratory of Hybrid Nanostructured Materials
- Kucherenko Central Research Institute for Structural Construction
- Institute for Physics of Advanced Materials
- 期: 卷 2016, 编号 11 (2016)
- 页面: 1012-1020
- 栏目: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/170974
- DOI: https://doi.org/10.1134/S0036029516110069
- ID: 170974
如何引用文章
详细
The structure formation and the mechanical properties of quenched and tempered grade 20 steel after equal-channel angular pressing (ECAP) at various true strains and 400°C are studied. Electron microscopy analysis after ECAP shows a partially submicrocrystalline and partially subgrain structure with a structural element size of 340–375 nm. The structural element size depends on the region in which the elements are formed (polyhedral ferrite, needle-shaped ferrite, tempered martensite, and pearlite). Heating of the steel after ECAP at 400 and 450°C increases the fraction of high-angle boundaries and the structural ferrite element size to 360–450 nm. The fragmentation and spheroidization of cementite lamellae of pearlite and subgrain coalescence in the regions of needle-shaped ferrite and tempered martensite take place at a high ECAP true strain and heating temperature. Structural refinement ensures considerable strengthening, namely, UTS 742–871 MPa at EL 11–15.3%. The strength slightly increases, whereas the plasticity slightly decreases when the true strain increases during ECAP. After ECAP and heating, the strength and plastic properties of the grade 20 steel remain almost the same.
作者简介
S. Dobatkin
Baikov Institute of Metallurgy and Materials Science; Laboratory of Hybrid Nanostructured Materials
编辑信件的主要联系方式.
Email: dobatkin@imet.ac.ru
俄罗斯联邦, Moscow, 119991; Moscow, 119049
P. Odesskii
Kucherenko Central Research Institute for Structural Construction
Email: dobatkin@imet.ac.ru
俄罗斯联邦, Moscow, 109428
G. Raab
Institute for Physics of Advanced Materials
Email: dobatkin@imet.ac.ru
俄罗斯联邦, Ufa, 450000
M. Tyutin
Baikov Institute of Metallurgy and Materials Science
Email: dobatkin@imet.ac.ru
俄罗斯联邦, Moscow, 119991
O. Rybalchenko
Baikov Institute of Metallurgy and Materials Science; Laboratory of Hybrid Nanostructured Materials
Email: dobatkin@imet.ac.ru
俄罗斯联邦, Moscow, 119991; Moscow, 119049
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