A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformation
The mixed dynamic recrystallization of titanium alloys during hot deformation is rarely described in the existing microstructure evolution models and constitutive models. In this paper, the mechanism of mixed dynamic recrystallization of a near-α titanium alloy rolled sheet during hot tension was an...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001218 |
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| author | Jie Zhao Yingming Tu Binjun Zhou Kehuan Wang Gang Liu |
| author_facet | Jie Zhao Yingming Tu Binjun Zhou Kehuan Wang Gang Liu |
| author_sort | Jie Zhao |
| collection | DOAJ |
| description | The mixed dynamic recrystallization of titanium alloys during hot deformation is rarely described in the existing microstructure evolution models and constitutive models. In this paper, the mechanism of mixed dynamic recrystallization of a near-α titanium alloy rolled sheet during hot tension was analyzed. The used TA15 rolled sheet is mainly composed of equiaxed grains with a lot of deformed structure, which promotes dynamic recrystallization during hot deformation. Continuous dynamic recrystallization is the predominant mechanism of microstructure evolution in the deformation region with the ln Z of about 47.5 and true strain of about 0.3. With the decrease of parameter Z, discontinuous dynamic recrystallization is enhanced. Then a physically-based constitutive model was developed, considering subgrain rotation, recrystallization nucleation, recrystallization grain growth, recrystallization grain transformation into deformation structure and microvoids evolution. The model can well describe the two kinds of mixed dynamic recrystallization: continuous dynamic recrystallization and discontinuous dynamic recrystallization occur successively and simultaneously. Based on the developed model, the process window of hot forming for TA15 titanium alloy components is established, realizing grain size reduction of 20 % and no necking. |
| format | Article |
| id | doaj-art-07f3eb9662754af5aa3511ed37020566 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-07f3eb9662754af5aa3511ed370205662025-01-21T04:13:08ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013513481357A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformationJie Zhao0Yingming Tu1Binjun Zhou2Kehuan Wang3Gang Liu4School of Materials Science and Engineering, Shandong Jianzhu University, Jinan, 250101, China; Research Institute of Materials Reliability for Advanced Equipments, Shandong Jianzhu University, Jinan, 250101, ChinaSchool of Materials Science and Engineering, Shandong Jianzhu University, Jinan, 250101, China; Research Institute of Materials Reliability for Advanced Equipments, Shandong Jianzhu University, Jinan, 250101, ChinaSchool of Mechanical and Vehicle Engineering, West Anhui University, Lu'an, 237012, ChinaNational Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150001, ChinaNational Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author.The mixed dynamic recrystallization of titanium alloys during hot deformation is rarely described in the existing microstructure evolution models and constitutive models. In this paper, the mechanism of mixed dynamic recrystallization of a near-α titanium alloy rolled sheet during hot tension was analyzed. The used TA15 rolled sheet is mainly composed of equiaxed grains with a lot of deformed structure, which promotes dynamic recrystallization during hot deformation. Continuous dynamic recrystallization is the predominant mechanism of microstructure evolution in the deformation region with the ln Z of about 47.5 and true strain of about 0.3. With the decrease of parameter Z, discontinuous dynamic recrystallization is enhanced. Then a physically-based constitutive model was developed, considering subgrain rotation, recrystallization nucleation, recrystallization grain growth, recrystallization grain transformation into deformation structure and microvoids evolution. The model can well describe the two kinds of mixed dynamic recrystallization: continuous dynamic recrystallization and discontinuous dynamic recrystallization occur successively and simultaneously. Based on the developed model, the process window of hot forming for TA15 titanium alloy components is established, realizing grain size reduction of 20 % and no necking.http://www.sciencedirect.com/science/article/pii/S2238785425001218Physically-based constitutive modelMixed dynamic recrystallizationNear-α titanium alloysHot deformation |
| spellingShingle | Jie Zhao Yingming Tu Binjun Zhou Kehuan Wang Gang Liu A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformation Journal of Materials Research and Technology Physically-based constitutive model Mixed dynamic recrystallization Near-α titanium alloys Hot deformation |
| title | A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformation |
| title_full | A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformation |
| title_fullStr | A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformation |
| title_full_unstemmed | A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformation |
| title_short | A physically-based constitutive model considering mixed dynamic recrystallization for a near-α titanium alloy during hot deformation |
| title_sort | physically based constitutive model considering mixed dynamic recrystallization for a near α titanium alloy during hot deformation |
| topic | Physically-based constitutive model Mixed dynamic recrystallization Near-α titanium alloys Hot deformation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001218 |
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