Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure
Tensile fracture of near-β-titanium alloys with bimodal microstructure （BM） is very sensitive to micro-void nucleation. In this study, micro-void nucleation, growth, and propagation during tensile fracture of Ti-55531 alloy are investigated. α/β grain boundary (α/β-GB) and α/β grain boundary shear (...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420319748 |
| _version_ | 1818666906703364096 |
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| author | Di Wu Libin Liu Ligang Zhang Wanlin Wang Kechao Zhou |
| author_facet | Di Wu Libin Liu Ligang Zhang Wanlin Wang Kechao Zhou |
| author_sort | Di Wu |
| collection | DOAJ |
| description | Tensile fracture of near-β-titanium alloys with bimodal microstructure （BM） is very sensitive to micro-void nucleation. In this study, micro-void nucleation, growth, and propagation during tensile fracture of Ti-55531 alloy are investigated. α/β grain boundary (α/β-GB) and α/β grain boundary shear (α/β-GBSH) micro-voids are the main void sources, accounting for 83% of the total voids. The reason for the formation of α/β-GB voids is the stress concentration caused by the difference in the strength of the primary α (αp) and β transformation (βtrans) microstructure and the low strength of the non-coherent αp/β interface. α/β-GB voids eventually lead to fractures along the αp/β interface. α/β-GBSH voids are caused by the difference in the strength of the αp phase, the grain boundary α phase and the βtrans structure, which will cause the αp phase to tear and fracture along the grain boundary α-phase. The {112¯2} twin is first observed in near-β-titanium alloy, which explains the high plasticity of the alloy. |
| first_indexed | 2024-12-17T06:11:59Z |
| format | Article |
| id | doaj.art-a007eae2c1534720a62bfd7d3b80441c |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-17T06:11:59Z |
| publishDate | 2020-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-a007eae2c1534720a62bfd7d3b80441c2022-12-21T22:00:36ZengElsevierJournal of Materials Research and Technology2238-78542020-11-01961544215453Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructureDi Wu0Libin Liu1Ligang Zhang2Wanlin Wang3Kechao Zhou4State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, PR China; School of Material Science and Engineering, Central South University, Changsha, Hunan, 410083, PR China; School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, PR China; School of Material Science and Engineering, Central South University, Changsha, Hunan, 410083, PR China; Corresponding author.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, PR China; School of Material Science and Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaSchool of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, PR ChinaTensile fracture of near-β-titanium alloys with bimodal microstructure （BM） is very sensitive to micro-void nucleation. In this study, micro-void nucleation, growth, and propagation during tensile fracture of Ti-55531 alloy are investigated. α/β grain boundary (α/β-GB) and α/β grain boundary shear (α/β-GBSH) micro-voids are the main void sources, accounting for 83% of the total voids. The reason for the formation of α/β-GB voids is the stress concentration caused by the difference in the strength of the primary α (αp) and β transformation (βtrans) microstructure and the low strength of the non-coherent αp/β interface. α/β-GB voids eventually lead to fractures along the αp/β interface. α/β-GBSH voids are caused by the difference in the strength of the αp phase, the grain boundary α phase and the βtrans structure, which will cause the αp phase to tear and fracture along the grain boundary α-phase. The {112¯2} twin is first observed in near-β-titanium alloy, which explains the high plasticity of the alloy.http://www.sciencedirect.com/science/article/pii/S2238785420319748Bimodal Ti-55531 alloyDeformation mechanism{112¯2} twinMicro-void nucleation |
| spellingShingle | Di Wu Libin Liu Ligang Zhang Wanlin Wang Kechao Zhou Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure Journal of Materials Research and Technology Bimodal Ti-55531 alloy Deformation mechanism {112¯2} twin Micro-void nucleation |
| title | Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure |
| title_full | Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure |
| title_fullStr | Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure |
| title_full_unstemmed | Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure |
| title_short | Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure |
| title_sort | tensile deformation mechanism and micro void nucleation of ti 55531 alloy with bimodal microstructure |
| topic | Bimodal Ti-55531 alloy Deformation mechanism {112¯2} twin Micro-void nucleation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420319748 |
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