Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm Deformation
The as-quenched medium-carbon low-alloy Fe-0.36wt.%C-1wt.%Cr steel was subjected to warm deformation via uniaxial compression at temperatures of 400–700 °C and strain rates of 10<sup>−4</sup>–10<sup>−2</sup> s<sup>−1</sup>. At low temperatures (400–550 °C), the mi...
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MDPI AG
2020-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/7/554 |
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| author | Dmitriy Panov Olga Dedyulina Dmitriy Shaysultanov Nikita Stepanov Sergey Zherebtsov Gennady Salishchev |
| author_facet | Dmitriy Panov Olga Dedyulina Dmitriy Shaysultanov Nikita Stepanov Sergey Zherebtsov Gennady Salishchev |
| author_sort | Dmitriy Panov |
| collection | DOAJ |
| description | The as-quenched medium-carbon low-alloy Fe-0.36wt.%C-1wt.%Cr steel was subjected to warm deformation via uniaxial compression at temperatures of 400–700 °C and strain rates of 10<sup>−4</sup>–10<sup>−2</sup> s<sup>−1</sup>. At low temperatures (400–550 °C), the microstructure evolution was mainly associated with dynamic recovery with the value of activation energy of 140 ± 35 kJ/mol. At higher temperatures (600–700 °C), dynamic recrystallization was developed, and activation energy in this case was 243 ± 15 kJ/mol. The presence of nanoscale carbide particles in the structure at temperatures of 400–600 °C resulted in the appearance of threshold stresses. A two-component <001>//compression direction (CD) and <111>//CD deformation texture was formed during deformation. Deformation at the low temperatures resulted in the formation of elongated ferritic grains separated mainly by high-angle boundaries (HAB) with a strong <001>//CD texture. The grains with the <111>//CD orientation were wider in comparison with those with the <001>//CD orientation. The development of substructure in the form of low-angle boundaries (LAB) networks was also observed in the <111>//CD grains. The development of dynamic recrystallization restricted the texture formation. The processing map for warm deformation of the 0.36C-1Cr steel was constructed. |
| first_indexed | 2024-03-10T18:49:46Z |
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| id | doaj.art-c6b73cf32e8f4a519cf0ce41b7846c1a |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T18:49:46Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-c6b73cf32e8f4a519cf0ce41b7846c1a2023-11-20T05:15:42ZengMDPI AGCrystals2073-43522020-06-0110755410.3390/cryst10070554Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm DeformationDmitriy Panov0Olga Dedyulina1Dmitriy Shaysultanov2Nikita Stepanov3Sergey Zherebtsov4Gennady Salishchev5Laboratory of Bulk Nanostructured Materials, Belgorod State University, 85 Pobeda Str., 803015 Belgorod, RussiaLaboratory of Bulk Nanostructured Materials, Belgorod State University, 85 Pobeda Str., 803015 Belgorod, RussiaLaboratory of Bulk Nanostructured Materials, Belgorod State University, 85 Pobeda Str., 803015 Belgorod, RussiaLaboratory of Bulk Nanostructured Materials, Belgorod State University, 85 Pobeda Str., 803015 Belgorod, RussiaLaboratory of Bulk Nanostructured Materials, Belgorod State University, 85 Pobeda Str., 803015 Belgorod, RussiaLaboratory of Bulk Nanostructured Materials, Belgorod State University, 85 Pobeda Str., 803015 Belgorod, RussiaThe as-quenched medium-carbon low-alloy Fe-0.36wt.%C-1wt.%Cr steel was subjected to warm deformation via uniaxial compression at temperatures of 400–700 °C and strain rates of 10<sup>−4</sup>–10<sup>−2</sup> s<sup>−1</sup>. At low temperatures (400–550 °C), the microstructure evolution was mainly associated with dynamic recovery with the value of activation energy of 140 ± 35 kJ/mol. At higher temperatures (600–700 °C), dynamic recrystallization was developed, and activation energy in this case was 243 ± 15 kJ/mol. The presence of nanoscale carbide particles in the structure at temperatures of 400–600 °C resulted in the appearance of threshold stresses. A two-component <001>//compression direction (CD) and <111>//CD deformation texture was formed during deformation. Deformation at the low temperatures resulted in the formation of elongated ferritic grains separated mainly by high-angle boundaries (HAB) with a strong <001>//CD texture. The grains with the <111>//CD orientation were wider in comparison with those with the <001>//CD orientation. The development of substructure in the form of low-angle boundaries (LAB) networks was also observed in the <111>//CD grains. The development of dynamic recrystallization restricted the texture formation. The processing map for warm deformation of the 0.36C-1Cr steel was constructed.https://www.mdpi.com/2073-4352/10/7/554deformation behaviorwarm deformationtexturemicrostructuredynamic recrystallizationprocessing map |
| spellingShingle | Dmitriy Panov Olga Dedyulina Dmitriy Shaysultanov Nikita Stepanov Sergey Zherebtsov Gennady Salishchev Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm Deformation Crystals deformation behavior warm deformation texture microstructure dynamic recrystallization processing map |
| title | Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm Deformation |
| title_full | Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm Deformation |
| title_fullStr | Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm Deformation |
| title_full_unstemmed | Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm Deformation |
| title_short | Mechanisms of Grain Structure Evolution in a Quenched Medium Carbon Steel during Warm Deformation |
| title_sort | mechanisms of grain structure evolution in a quenched medium carbon steel during warm deformation |
| topic | deformation behavior warm deformation texture microstructure dynamic recrystallization processing map |
| url | https://www.mdpi.com/2073-4352/10/7/554 |
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