Critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steel
Isothermal hot compression tests of low alloy 1 wt%Cr–1 wt%Mo medium carbon rotor steel were carried out over the temperature range from 850 °C–1050 °C under three strain rates $\left(\dot{\varepsilon }\right)$ varying from 0.001 s ^−1 –0.1 ^.1 s ^−1 . The hot deformation behavior, activation energy...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab731b |
| _version_ | 1797746505456549888 |
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| author | Sumit Kumar Sumeer K Nath |
| author_facet | Sumit Kumar Sumeer K Nath |
| author_sort | Sumit Kumar |
| collection | DOAJ |
| description | Isothermal hot compression tests of low alloy 1 wt%Cr–1 wt%Mo medium carbon rotor steel were carried out over the temperature range from 850 °C–1050 °C under three strain rates $\left(\dot{\varepsilon }\right)$ varying from 0.001 s ^−1 –0.1 ^.1 s ^−1 . The hot deformation behavior, activation energy and material constants were determined by constitutive analysis. Onset of critical condition parameters for dynamic recrystallization (DRX) of the present steel were determined with the help of mathematical models developed by Poliak and Jonas. DRX kinetics were studied to determine the fraction of dynamic recrystallization with the help of Avrami type model. Also, the values of Avrami power exponent $(n)$ and material constant $(K)$ were calculated for Avrami equation in each deformation condition. Optical and scanning electron (SEM) micrographs of the as-received and the deformed specimens were analyzed to understand the flow stress behavior of this steel. |
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| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:38:45Z |
| publishDate | 2020-01-01 |
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| spelling | doaj.art-e72b65fb03dd4b3ca2f28c3eed7719f42023-08-09T16:07:16ZengIOP PublishingMaterials Research Express2053-15912020-01-017202654810.1088/2053-1591/ab731bCritical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steelSumit Kumar0Sumeer K Nath1https://orcid.org/0000-0002-2993-2771Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Roorkee-247667, Uttarakhand, IndiaDepartment of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Roorkee-247667, Uttarakhand, IndiaIsothermal hot compression tests of low alloy 1 wt%Cr–1 wt%Mo medium carbon rotor steel were carried out over the temperature range from 850 °C–1050 °C under three strain rates $\left(\dot{\varepsilon }\right)$ varying from 0.001 s ^−1 –0.1 ^.1 s ^−1 . The hot deformation behavior, activation energy and material constants were determined by constitutive analysis. Onset of critical condition parameters for dynamic recrystallization (DRX) of the present steel were determined with the help of mathematical models developed by Poliak and Jonas. DRX kinetics were studied to determine the fraction of dynamic recrystallization with the help of Avrami type model. Also, the values of Avrami power exponent $(n)$ and material constant $(K)$ were calculated for Avrami equation in each deformation condition. Optical and scanning electron (SEM) micrographs of the as-received and the deformed specimens were analyzed to understand the flow stress behavior of this steel.https://doi.org/10.1088/2053-1591/ab731bsteelhot deformationdynamic recrystallizationstrain hardening ratecritical stressAvrami equation |
| spellingShingle | Sumit Kumar Sumeer K Nath Critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steel Materials Research Express steel hot deformation dynamic recrystallization strain hardening rate critical stress Avrami equation |
| title | Critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steel |
| title_full | Critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steel |
| title_fullStr | Critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steel |
| title_full_unstemmed | Critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steel |
| title_short | Critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt%Cr-1 wt%Mo rotor steel |
| title_sort | critical condition parameters and kinetics of dynamic recrystallization for hot deformed 1 wt cr 1 wt mo rotor steel |
| topic | steel hot deformation dynamic recrystallization strain hardening rate critical stress Avrami equation |
| url | https://doi.org/10.1088/2053-1591/ab731b |
| work_keys_str_mv | AT sumitkumar criticalconditionparametersandkineticsofdynamicrecrystallizationforhotdeformed1wtcr1wtmorotorsteel AT sumeerknath criticalconditionparametersandkineticsofdynamicrecrystallizationforhotdeformed1wtcr1wtmorotorsteel |