Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming
The dynamic recrystallization (DRX) behavior of 5CrNiMoV steel was investigated through hot compression at temperatures of 830–1230°C and strain rates of 0.001–10 s−1. From the experimental results, most true stress-strain curves showed the typical nature of DRX that a single peak was reached at low...
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/4732683 |
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| author | Zhiqiang Hu Kaikun Wang |
| author_facet | Zhiqiang Hu Kaikun Wang |
| author_sort | Zhiqiang Hu |
| collection | DOAJ |
| description | The dynamic recrystallization (DRX) behavior of 5CrNiMoV steel was investigated through hot compression at temperatures of 830–1230°C and strain rates of 0.001–10 s−1. From the experimental results, most true stress-strain curves showed the typical nature of DRX that a single peak was reached at low strains followed by a decrease of stress and a steady state finally at relatively high strains. The constitutive behavior of 5CrNiMoV steel was analyzed to deduce the operative deformation mechanisms, and the correlation between flow stress, temperature, and strain rate was expressed as a sine hyperbolic type constitutive equation. Based on the study of characteristic stresses and strains on the true stress-strain curves, a DRX kinetics model was constructed to characterize the influence of true strain, temperature, and strain rate on DRX evolution, which revealed that higher temperatures and lower strain rates had a favorable influence on improving the DRX volume fraction at the same true strain. Microstructure observations indicated that DRX was the main mechanism and austenite grains could be greatly refined by reducing the temperature of hot deformation or increasing the strain rate when complete recrystallization occurred. Furthermore, a DRX grain size model of 5CrNiMoV was obtained to predict the average DRX grain size during hot forming. |
| format | Article |
| id | doaj-art-37a007584aac46f38b5d9f7fbb338942 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-37a007584aac46f38b5d9f7fbb3389422025-02-03T06:06:27ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/47326834732683Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot FormingZhiqiang Hu0Kaikun Wang1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaThe dynamic recrystallization (DRX) behavior of 5CrNiMoV steel was investigated through hot compression at temperatures of 830–1230°C and strain rates of 0.001–10 s−1. From the experimental results, most true stress-strain curves showed the typical nature of DRX that a single peak was reached at low strains followed by a decrease of stress and a steady state finally at relatively high strains. The constitutive behavior of 5CrNiMoV steel was analyzed to deduce the operative deformation mechanisms, and the correlation between flow stress, temperature, and strain rate was expressed as a sine hyperbolic type constitutive equation. Based on the study of characteristic stresses and strains on the true stress-strain curves, a DRX kinetics model was constructed to characterize the influence of true strain, temperature, and strain rate on DRX evolution, which revealed that higher temperatures and lower strain rates had a favorable influence on improving the DRX volume fraction at the same true strain. Microstructure observations indicated that DRX was the main mechanism and austenite grains could be greatly refined by reducing the temperature of hot deformation or increasing the strain rate when complete recrystallization occurred. Furthermore, a DRX grain size model of 5CrNiMoV was obtained to predict the average DRX grain size during hot forming.http://dx.doi.org/10.1155/2020/4732683 |
| spellingShingle | Zhiqiang Hu Kaikun Wang Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming Advances in Materials Science and Engineering |
| title | Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming |
| title_full | Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming |
| title_fullStr | Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming |
| title_full_unstemmed | Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming |
| title_short | Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming |
| title_sort | evolution of dynamic recrystallization in 5crnimov steel during hot forming |
| url | http://dx.doi.org/10.1155/2020/4732683 |
| work_keys_str_mv | AT zhiqianghu evolutionofdynamicrecrystallizationin5crnimovsteelduringhotforming AT kaikunwang evolutionofdynamicrecrystallizationin5crnimovsteelduringhotforming |