Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase region
In this study, hot rolling treatment followed by water quenching was conducted on a TC18 titanium alloy in β single-phase region with varying reductions. Experimental evidences from X-ray diffraction and transmission electron microscopy indicate the formation of α phase, induced by sufficient stress...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423020823 |
| _version_ | 1797646659329458176 |
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| author | Changchang Liu Ji Gu Min Song |
| author_facet | Changchang Liu Ji Gu Min Song |
| author_sort | Changchang Liu |
| collection | DOAJ |
| description | In this study, hot rolling treatment followed by water quenching was conducted on a TC18 titanium alloy in β single-phase region with varying reductions. Experimental evidences from X-ray diffraction and transmission electron microscopy indicate the formation of α phase, induced by sufficient stress and assisted by ω phase. In addition, the existence of α'' phase and diffuse streaks were also observed during the hot working processing. Furthermore, dynamic recrystallization (DRX) including continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) was proved to exist in the hot rolling process. During the whole DRX process, with increasing the deformation degree, recrystallized grains nucleated preferentially at high-energy areas such as grain boundaries and shear bands, then accumulated and grew until achieving a complete recrystallization state. It should be noted that DDRX mainly occurred at the grain boundaries, while CDRX grains nucleated within the shear bands. The elongation gradually decreased and tensile strength gradually increased with the increment of the deformation degree. |
| first_indexed | 2024-03-11T15:05:52Z |
| format | Article |
| id | doaj.art-893413e586a94ad68b21516b780f5948 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:05:52Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-893413e586a94ad68b21516b780f59482023-10-30T06:04:04ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012653375346Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase regionChangchang Liu0Ji Gu1Min Song2State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaCorresponding author.; State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaIn this study, hot rolling treatment followed by water quenching was conducted on a TC18 titanium alloy in β single-phase region with varying reductions. Experimental evidences from X-ray diffraction and transmission electron microscopy indicate the formation of α phase, induced by sufficient stress and assisted by ω phase. In addition, the existence of α'' phase and diffuse streaks were also observed during the hot working processing. Furthermore, dynamic recrystallization (DRX) including continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) was proved to exist in the hot rolling process. During the whole DRX process, with increasing the deformation degree, recrystallized grains nucleated preferentially at high-energy areas such as grain boundaries and shear bands, then accumulated and grew until achieving a complete recrystallization state. It should be noted that DDRX mainly occurred at the grain boundaries, while CDRX grains nucleated within the shear bands. The elongation gradually decreased and tensile strength gradually increased with the increment of the deformation degree.http://www.sciencedirect.com/science/article/pii/S2238785423020823TC18 alloyHot rollingDynamic recrystallizationPhase transformationDeformation mechanism |
| spellingShingle | Changchang Liu Ji Gu Min Song Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase region Journal of Materials Research and Technology TC18 alloy Hot rolling Dynamic recrystallization Phase transformation Deformation mechanism |
| title | Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase region |
| title_full | Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase region |
| title_fullStr | Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase region |
| title_full_unstemmed | Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase region |
| title_short | Evolutions of the microstructures and mechanical properties of TC18 titanium alloy processed by hot-rolling in β single-phase region |
| title_sort | evolutions of the microstructures and mechanical properties of tc18 titanium alloy processed by hot rolling in β single phase region |
| topic | TC18 alloy Hot rolling Dynamic recrystallization Phase transformation Deformation mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423020823 |
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