Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase region
In this work, the flow behaviors and microstructure evolution of a solid solution Ti55511 alloy deformed in the two-phase region are investigated by hot compression experiments. Subsequently, The spheroidization mechanisms of α phases and the refinement mechanism of β matrix are analyzed. The alloy...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029089 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832595311114059776 |
|---|---|
| author | Huijie Zhang Y.C. Lin Gang Su Yongfu Xie Wei Qiu Ningfu Zeng Song Zhang Guicheng Wu |
| author_facet | Huijie Zhang Y.C. Lin Gang Su Yongfu Xie Wei Qiu Ningfu Zeng Song Zhang Guicheng Wu |
| author_sort | Huijie Zhang |
| collection | DOAJ |
| description | In this work, the flow behaviors and microstructure evolution of a solid solution Ti55511 alloy deformed in the two-phase region are investigated by hot compression experiments. Subsequently, The spheroidization mechanisms of α phases and the refinement mechanism of β matrix are analyzed. The alloy exhibits obvious work hardening (WH) and flow softening characteristics. The secondary α phases gradually precipitate and spheroidize, while the primary α phases dissolute above the solution temperature or coarsen when the alloy is deformed below the solution temperature. Meanwhile, the β matrix undergoes continuous dynamic recrystallization (CDRX) behavior. The increase of deformation amounts promotes the simultaneous precipitation and spheroidization of lamellar α phases. Raising deformation temperature inhibits the precipitation and spheroidization of lamellar α phases. However, the maximum values of precipitated and spheroidized lamellar α phase occur at 0.01 s−1. Higher strain rate can promote CDRX of β matrix between 1003 and 1033 K, but inhibit it between 1063 and 1123 K, indicating differences in the dynamic recrystallization (DRX) mechanism at different temperature regions. A unified constitutive model based on physical mechanisms is proposed. The model takes into account both WH and grain boundary strengthening effects by coupling all parts of phases. Furthermore, the dynamic softening, including dynamic recovery (DRV), spheroidization of lamellar α phases, and CDRX of the β matrix, are also considered. Material constants are determined using a genetic algorithm (GA), and the experimental data align well with the predicted data. Finally, process parameters are optimized based on the model to achieve favorable microstructures. |
| format | Article |
| id | doaj-art-266358141dde47d7816839100cb9b396 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-266358141dde47d7816839100cb9b3962025-01-19T06:25:28ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013415911610Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase regionHuijie Zhang0Y.C. Lin1Gang Su2Yongfu Xie3Wei Qiu4Ningfu Zeng5Song Zhang6Guicheng Wu7School of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, ChinaSchool of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China; State Key Laboratory of Precision Manufacturing for Extreme Service Performance, Changsha, 410083, China; Corresponding author. School of Mechanical and Electrical Engineering, Central South University, China.School of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, ChinaGuizhou Anda Aviation Forging Co. Ltd., Anshun, 561005, ChinaGuizhou Anda Aviation Forging Co. Ltd., Anshun, 561005, ChinaSchool of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, ChinaSchool of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, ChinaSchool of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, ChinaIn this work, the flow behaviors and microstructure evolution of a solid solution Ti55511 alloy deformed in the two-phase region are investigated by hot compression experiments. Subsequently, The spheroidization mechanisms of α phases and the refinement mechanism of β matrix are analyzed. The alloy exhibits obvious work hardening (WH) and flow softening characteristics. The secondary α phases gradually precipitate and spheroidize, while the primary α phases dissolute above the solution temperature or coarsen when the alloy is deformed below the solution temperature. Meanwhile, the β matrix undergoes continuous dynamic recrystallization (CDRX) behavior. The increase of deformation amounts promotes the simultaneous precipitation and spheroidization of lamellar α phases. Raising deformation temperature inhibits the precipitation and spheroidization of lamellar α phases. However, the maximum values of precipitated and spheroidized lamellar α phase occur at 0.01 s−1. Higher strain rate can promote CDRX of β matrix between 1003 and 1033 K, but inhibit it between 1063 and 1123 K, indicating differences in the dynamic recrystallization (DRX) mechanism at different temperature regions. A unified constitutive model based on physical mechanisms is proposed. The model takes into account both WH and grain boundary strengthening effects by coupling all parts of phases. Furthermore, the dynamic softening, including dynamic recovery (DRV), spheroidization of lamellar α phases, and CDRX of the β matrix, are also considered. Material constants are determined using a genetic algorithm (GA), and the experimental data align well with the predicted data. Finally, process parameters are optimized based on the model to achieve favorable microstructures.http://www.sciencedirect.com/science/article/pii/S2238785424029089Ti alloyHot deformationModelContinuous dynamic recrystallizationSpheroidization |
| spellingShingle | Huijie Zhang Y.C. Lin Gang Su Yongfu Xie Wei Qiu Ningfu Zeng Song Zhang Guicheng Wu Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase region Journal of Materials Research and Technology Ti alloy Hot deformation Model Continuous dynamic recrystallization Spheroidization |
| title | Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase region |
| title_full | Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase region |
| title_fullStr | Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase region |
| title_full_unstemmed | Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase region |
| title_short | Hot deformation physical mechanisms and a unified constitutive model of a solid solution Ti55511 alloy deformed in the two-phase region |
| title_sort | hot deformation physical mechanisms and a unified constitutive model of a solid solution ti55511 alloy deformed in the two phase region |
| topic | Ti alloy Hot deformation Model Continuous dynamic recrystallization Spheroidization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029089 |
| work_keys_str_mv | AT huijiezhang hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion AT yclin hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion AT gangsu hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion AT yongfuxie hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion AT weiqiu hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion AT ningfuzeng hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion AT songzhang hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion AT guichengwu hotdeformationphysicalmechanismsandaunifiedconstitutivemodelofasolidsolutionti55511alloydeformedinthetwophaseregion |