Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rolling
Recently, severe plastic deformation of alloys under cold conditions has been experimentally investigated to develop refined microstructures. The present study proposed to demonstrate the feasibility of applying cold deformation to a β-solution treated near β-Ti alloy. To be specific, the evolution...
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422011917 |
| _version_ | 1811253085935239168 |
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| author | Wei Chen Qifeng Li Libo Zhou Cong Li Wei Qiu Jian Chen Yongcheng Lin Kechao Zhou |
| author_facet | Wei Chen Qifeng Li Libo Zhou Cong Li Wei Qiu Jian Chen Yongcheng Lin Kechao Zhou |
| author_sort | Wei Chen |
| collection | DOAJ |
| description | Recently, severe plastic deformation of alloys under cold conditions has been experimentally investigated to develop refined microstructures. The present study proposed to demonstrate the feasibility of applying cold deformation to a β-solution treated near β-Ti alloy. To be specific, the evolution of microstructure and mechanical properties of a β-solution treated near β-Ti alloy subjected to unidirectional 20% cold rolling were investigated. Results showed that long cracks formed in the 20% cold rolled sample. Meanwhile, two types of deformation-inducted α′ martensite have been observed in cold-rolled β matrix, namely, acicular α′ martensite with an orientation relationship of (12¯10)α′//(111)β with β matrix, and deformed (irregular shape) α′ martensite without coordinating orientation relationship. The formation of cracks was mainly related to the pre-existing α′ plate, and the micro-crack was prone to occur in α′ plates and propagate to β matrix. The microstructure characteristics result in poor ductility and low ultimate strength in the cold-rolled sample. Lastly, the lattice distortion and {101¯2}1¯011 α′-twinning were also characterized in the deformed α′ plates. |
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| id | doaj.art-bc8c3ad8791041c589e0f7f1c9d42798 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-12T16:45:29Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-bc8c3ad8791041c589e0f7f1c9d427982022-12-22T03:24:37ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012023852393Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rollingWei Chen0Qifeng Li1Libo Zhou2Cong Li3Wei Qiu4Jian Chen5Yongcheng Lin6Kechao Zhou7School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & Technology, Changsha, Hunan 410114, China; State Key Laboratory of Powder Metallurgy, Central South University, Lu Mountain South Road, Hunan, Changsha 410083, PR China; Corresponding author.School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaSchool of Energy and Power Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaSchool of Energy and Power Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaSchool of Energy and Power Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaSchool of Energy and Power Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & Technology, Changsha, Hunan 410114, ChinaSchool of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Lu Mountain South Road, Hunan, Changsha 410083, PR ChinaRecently, severe plastic deformation of alloys under cold conditions has been experimentally investigated to develop refined microstructures. The present study proposed to demonstrate the feasibility of applying cold deformation to a β-solution treated near β-Ti alloy. To be specific, the evolution of microstructure and mechanical properties of a β-solution treated near β-Ti alloy subjected to unidirectional 20% cold rolling were investigated. Results showed that long cracks formed in the 20% cold rolled sample. Meanwhile, two types of deformation-inducted α′ martensite have been observed in cold-rolled β matrix, namely, acicular α′ martensite with an orientation relationship of (12¯10)α′//(111)β with β matrix, and deformed (irregular shape) α′ martensite without coordinating orientation relationship. The formation of cracks was mainly related to the pre-existing α′ plate, and the micro-crack was prone to occur in α′ plates and propagate to β matrix. The microstructure characteristics result in poor ductility and low ultimate strength in the cold-rolled sample. Lastly, the lattice distortion and {101¯2}1¯011 α′-twinning were also characterized in the deformed α′ plates.http://www.sciencedirect.com/science/article/pii/S2238785422011917Near β-Ti alloyCold deformationMicrostructure evolutionα′ martensiteα′-twinning |
| spellingShingle | Wei Chen Qifeng Li Libo Zhou Cong Li Wei Qiu Jian Chen Yongcheng Lin Kechao Zhou Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rolling Journal of Materials Research and Technology Near β-Ti alloy Cold deformation Microstructure evolution α′ martensite α′-twinning |
| title | Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rolling |
| title_full | Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rolling |
| title_fullStr | Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rolling |
| title_full_unstemmed | Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rolling |
| title_short | Limit of cold deformation in a near β-Ti alloy: role of α′ phases on the failure of β phase during cold rolling |
| title_sort | limit of cold deformation in a near β ti alloy role of α phases on the failure of β phase during cold rolling |
| topic | Near β-Ti alloy Cold deformation Microstructure evolution α′ martensite α′-twinning |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422011917 |
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