Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm Deformation
The warm deformation behavior of 20CrMoA steel at the temperature of 873–1123 K and the strain rate of 0.01−10 s<sup>−1</sup> was investigated to obtain its processing property and optimum processing parameters. The true stress-true strain curves showed that flow stress reaches the peak...
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| Format: | Article |
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MDPI AG
2020-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/12/1602 |
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| author | Sheng Xu Xuedao Shu Shuxin Li Ji Chen |
| author_facet | Sheng Xu Xuedao Shu Shuxin Li Ji Chen |
| author_sort | Sheng Xu |
| collection | DOAJ |
| description | The warm deformation behavior of 20CrMoA steel at the temperature of 873–1123 K and the strain rate of 0.01−10 s<sup>−1</sup> was investigated to obtain its processing property and optimum processing parameters. The true stress-true strain curves showed that flow stress reaches the peak rapidly, followed by slow decrease till reaching a steady state. This suggests a flow softening of dynamic recovery. The stress dropped with increasing deformation temperature and decreasing strain rate. The reduction became more distinct at lower temperature and higher strain rate due to flow softening caused by deformation heat. In the temperature range of 873–973 K, the deformation of 20CrMoA steel was more sensitive to temperature, and the average decline rate of steady stress was 6.9 times larger than that in the temperature range of 1023–1123 K. After modifying the stress curves, a constitutive model was developed for different deformation temperature ranges based on modified curves. The model was in good agreement with the experimental results. |
| first_indexed | 2024-03-10T14:26:52Z |
| format | Article |
| id | doaj.art-2324a145b16c48249df03734eec33edf |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T14:26:52Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-2324a145b16c48249df03734eec33edf2023-11-20T22:52:02ZengMDPI AGMetals2075-47012020-11-011012160210.3390/met10121602Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm DeformationSheng Xu0Xuedao Shu1Shuxin Li2Ji Chen3College of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, ChinaCollege of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, ChinaCollege of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, ChinaCollege of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, ChinaThe warm deformation behavior of 20CrMoA steel at the temperature of 873–1123 K and the strain rate of 0.01−10 s<sup>−1</sup> was investigated to obtain its processing property and optimum processing parameters. The true stress-true strain curves showed that flow stress reaches the peak rapidly, followed by slow decrease till reaching a steady state. This suggests a flow softening of dynamic recovery. The stress dropped with increasing deformation temperature and decreasing strain rate. The reduction became more distinct at lower temperature and higher strain rate due to flow softening caused by deformation heat. In the temperature range of 873–973 K, the deformation of 20CrMoA steel was more sensitive to temperature, and the average decline rate of steady stress was 6.9 times larger than that in the temperature range of 1023–1123 K. After modifying the stress curves, a constitutive model was developed for different deformation temperature ranges based on modified curves. The model was in good agreement with the experimental results.https://www.mdpi.com/2075-4701/10/12/160220CrMoA steelwarm deformationstress correctionconstitutive model |
| spellingShingle | Sheng Xu Xuedao Shu Shuxin Li Ji Chen Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm Deformation Metals 20CrMoA steel warm deformation stress correction constitutive model |
| title | Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm Deformation |
| title_full | Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm Deformation |
| title_fullStr | Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm Deformation |
| title_full_unstemmed | Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm Deformation |
| title_short | Flow Stress Curve Modification and Constitutive Model of 20CrMoA Steel during Warm Deformation |
| title_sort | flow stress curve modification and constitutive model of 20crmoa steel during warm deformation |
| topic | 20CrMoA steel warm deformation stress correction constitutive model |
| url | https://www.mdpi.com/2075-4701/10/12/1602 |
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