Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformation
Microstructure evolution behavior and softening mechanism of Ti-55511 alloy during sub β-transus hot deformation were systematically investigated. The results show that the deformation parameters greatly affect the dynamic softening behavior of α and β. Among them, either increasing the temperature...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424027054 |
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| author | Shuangxi Shi Jinyang Ge Xiaoyong Zhang Yaobiao Liang Qixing Liu |
| author_facet | Shuangxi Shi Jinyang Ge Xiaoyong Zhang Yaobiao Liang Qixing Liu |
| author_sort | Shuangxi Shi |
| collection | DOAJ |
| description | Microstructure evolution behavior and softening mechanism of Ti-55511 alloy during sub β-transus hot deformation were systematically investigated. The results show that the deformation parameters greatly affect the dynamic softening behavior of α and β. Among them, either increasing the temperature or significantly increasing the strain rate favor the DRX of the α phase. The aspect ratio of the equiaxed α gradually increases during early stages of hot deformation, and the α phase is elongated to form the lamellar-like structure. Subsequently, its inner interface gradually migrate and transform, which is accompanied by the wedging of the β phase and dynamic globalization of the α phase, leading to the refinement of α grains. For β, the main softening mechanism is DRV. However, increasing the deformation temperature and decreasing the strain rate can promote DRX of the β phase. Its DRX is accomplished by the progressive sub-grains rotation, which increases their misorientation and thus facilitates the LAGB to HAGB transition, a typical CDRX. The equiaxed α grains promote nucleation of β recrystallized grains at the α/β phase interface. |
| format | Article |
| id | doaj-art-b7c66807061d4dc9a4c39fb86fc0563f |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-b7c66807061d4dc9a4c39fb86fc0563f2024-12-26T08:55:50ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013383298346Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformationShuangxi Shi0Jinyang Ge1Xiaoyong Zhang2Yaobiao Liang3Qixing Liu4Guangxi Key Laboratory of Special Engineering Equipment and Control, Guilin University of Aerospace Technology, Guilin, 541004, China; Corresponding author.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaGuangxi Key Laboratory of Special Engineering Equipment and Control, Guilin University of Aerospace Technology, Guilin, 541004, ChinaGuangxi Key Laboratory of Special Engineering Equipment and Control, Guilin University of Aerospace Technology, Guilin, 541004, ChinaMicrostructure evolution behavior and softening mechanism of Ti-55511 alloy during sub β-transus hot deformation were systematically investigated. The results show that the deformation parameters greatly affect the dynamic softening behavior of α and β. Among them, either increasing the temperature or significantly increasing the strain rate favor the DRX of the α phase. The aspect ratio of the equiaxed α gradually increases during early stages of hot deformation, and the α phase is elongated to form the lamellar-like structure. Subsequently, its inner interface gradually migrate and transform, which is accompanied by the wedging of the β phase and dynamic globalization of the α phase, leading to the refinement of α grains. For β, the main softening mechanism is DRV. However, increasing the deformation temperature and decreasing the strain rate can promote DRX of the β phase. Its DRX is accomplished by the progressive sub-grains rotation, which increases their misorientation and thus facilitates the LAGB to HAGB transition, a typical CDRX. The equiaxed α grains promote nucleation of β recrystallized grains at the α/β phase interface.http://www.sciencedirect.com/science/article/pii/S2238785424027054Ti-55511 alloySoftening mechanismDynamic recoveryDynamic recrystallizationDynamic globalization |
| spellingShingle | Shuangxi Shi Jinyang Ge Xiaoyong Zhang Yaobiao Liang Qixing Liu Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformation Journal of Materials Research and Technology Ti-55511 alloy Softening mechanism Dynamic recovery Dynamic recrystallization Dynamic globalization |
| title | Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformation |
| title_full | Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformation |
| title_fullStr | Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformation |
| title_full_unstemmed | Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformation |
| title_short | Microstructure evolution and softening mechanism of Ti-55511 alloy with equiaxed structure during sub β-transus hot deformation |
| title_sort | microstructure evolution and softening mechanism of ti 55511 alloy with equiaxed structure during sub β transus hot deformation |
| topic | Ti-55511 alloy Softening mechanism Dynamic recovery Dynamic recrystallization Dynamic globalization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424027054 |
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