Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless Steel
The hot deformation behavior of a nitrogen-bearing martensitic stainless steel was researched by the isothermal compression test in the temperature range of 950–1150 °C and strain rate range of 0.01–10 s<sup>−1</sup> with a Gleeble-3800 thermal-mechanical simulating tester. A strain comp...
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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/2075-4701/10/11/1502 |
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| author | Xiao Li Lifeng Hou Yinghui Wei Zhengyan Wei |
| author_facet | Xiao Li Lifeng Hou Yinghui Wei Zhengyan Wei |
| author_sort | Xiao Li |
| collection | DOAJ |
| description | The hot deformation behavior of a nitrogen-bearing martensitic stainless steel was researched by the isothermal compression test in the temperature range of 950–1150 °C and strain rate range of 0.01–10 s<sup>−1</sup> with a Gleeble-3800 thermal-mechanical simulating tester. A strain compensated sine-hyperbolic Arrhenius-type constitutive equation was developed to describe the relationship between true stress and deformation parameters such as temperature, strain rate and true strain. The hot deformation activation energy is calculated to be from 407 to 487 KJ mol<sup>−1</sup>. It is validated by the standard statistical parameters that the established constitutive equation can accurately predict the true stress. The processing maps at different true strains were constructed based on the dynamic material model (DMM) and the true stress data obtained from the hot compression tests. Two unstable regions which should be avoided during hot working were observed from the processing map. In addition, the optimum hot working parameters are located in the domain of 1000–1150 °C/0.1–1 s<sup>−1</sup> with the peak power dissipation efficiency of 39.9%, in which complete dynamic recrystallization (DRX) occurs. |
| first_indexed | 2024-03-10T14:55:41Z |
| format | Article |
| id | doaj.art-3ac098ddfb074ac29e57ce4bd31cf122 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T14:55:41Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-3ac098ddfb074ac29e57ce4bd31cf1222023-11-20T20:34:43ZengMDPI AGMetals2075-47012020-11-011011150210.3390/met10111502Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless SteelXiao Li0Lifeng Hou1Yinghui Wei2Zhengyan Wei3College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaState Key Laboratory of Advanced Stainless Steel Materials, Taiyuan 030003, ChinaThe hot deformation behavior of a nitrogen-bearing martensitic stainless steel was researched by the isothermal compression test in the temperature range of 950–1150 °C and strain rate range of 0.01–10 s<sup>−1</sup> with a Gleeble-3800 thermal-mechanical simulating tester. A strain compensated sine-hyperbolic Arrhenius-type constitutive equation was developed to describe the relationship between true stress and deformation parameters such as temperature, strain rate and true strain. The hot deformation activation energy is calculated to be from 407 to 487 KJ mol<sup>−1</sup>. It is validated by the standard statistical parameters that the established constitutive equation can accurately predict the true stress. The processing maps at different true strains were constructed based on the dynamic material model (DMM) and the true stress data obtained from the hot compression tests. Two unstable regions which should be avoided during hot working were observed from the processing map. In addition, the optimum hot working parameters are located in the domain of 1000–1150 °C/0.1–1 s<sup>−1</sup> with the peak power dissipation efficiency of 39.9%, in which complete dynamic recrystallization (DRX) occurs.https://www.mdpi.com/2075-4701/10/11/1502hot deformation behaviornitrogen-bearing martensitic stainless steelconstitutive equationprocessing map |
| spellingShingle | Xiao Li Lifeng Hou Yinghui Wei Zhengyan Wei Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless Steel Metals hot deformation behavior nitrogen-bearing martensitic stainless steel constitutive equation processing map |
| title | Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless Steel |
| title_full | Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless Steel |
| title_fullStr | Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless Steel |
| title_full_unstemmed | Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless Steel |
| title_short | Constitutive Equation and Hot Processing Map of a Nitrogen-Bearing Martensitic Stainless Steel |
| title_sort | constitutive equation and hot processing map of a nitrogen bearing martensitic stainless steel |
| topic | hot deformation behavior nitrogen-bearing martensitic stainless steel constitutive equation processing map |
| url | https://www.mdpi.com/2075-4701/10/11/1502 |
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