Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study
Oxygen has been known as an effective strengthening element in titanium (Ti) and its alloys. However, an over-dose of oxygen can also lead to embrittlement of Ti alloys. To precisely control and push the limit of oxygen in Ti and its alloys, we studied the decomposition process of Ti oxides in pure...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523002125 |
| _version_ | 1827974673361534976 |
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| author | Xianzhe Shi Xiuxia Wang Biao Chen Junko Umeda Abdollah Bahador Katsuyoshi Kondoh Jianghua Shen |
| author_facet | Xianzhe Shi Xiuxia Wang Biao Chen Junko Umeda Abdollah Bahador Katsuyoshi Kondoh Jianghua Shen |
| author_sort | Xianzhe Shi |
| collection | DOAJ |
| description | Oxygen has been known as an effective strengthening element in titanium (Ti) and its alloys. However, an over-dose of oxygen can also lead to embrittlement of Ti alloys. To precisely control and push the limit of oxygen in Ti and its alloys, we studied the decomposition process of Ti oxides in pure α-Ti matrix using an in-situ high-temperature scanning electron microscope. The experimental results revealed that TiO particles decomposed in α-Ti at elevated temperatures and the oxygen atoms gradually diffused into the matrix, following the Fick’s second law. Then, the samples with different oxygen contents were produced using the aforementioned strategy, for which the oxygen content, microstructure, and mechanical properties were measured. The results revealed that the oxygen content can be precisely controlled, which can achieve an ultra-high tensile strength of close to 1100 MPa, at no expense of elongation-to-failure, with incorporating 0.87 wt% oxygen. An analysis showed that the strength contribution from oxygen follows the Labusch law. These findings offer a novel approach to design high-performance Ti alloys with non-toxic and cheap elements. |
| first_indexed | 2024-04-09T19:58:09Z |
| format | Article |
| id | doaj.art-008d8f26fc6d4545b52121dda9b2caec |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-09T19:58:09Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-008d8f26fc6d4545b52121dda9b2caec2023-04-03T05:21:07ZengElsevierMaterials & Design0264-12752023-03-01227111797Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ studyXianzhe Shi0Xiuxia Wang1Biao Chen2Junko Umeda3Abdollah Bahador4Katsuyoshi Kondoh5Jianghua Shen6School of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi, ChinaSchool of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, Shaanxi, ChinaJoining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Osaka, JapanJoining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Osaka, JapanJoining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Osaka, JapanSchool of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi, China; Shaanxi Key Laboratory of Impact Dynamic and Its Engineering Application, Northwestern Polytechnical University, Xi’an, Shaanxi, China; Corresponding author at: School of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi, China.Oxygen has been known as an effective strengthening element in titanium (Ti) and its alloys. However, an over-dose of oxygen can also lead to embrittlement of Ti alloys. To precisely control and push the limit of oxygen in Ti and its alloys, we studied the decomposition process of Ti oxides in pure α-Ti matrix using an in-situ high-temperature scanning electron microscope. The experimental results revealed that TiO particles decomposed in α-Ti at elevated temperatures and the oxygen atoms gradually diffused into the matrix, following the Fick’s second law. Then, the samples with different oxygen contents were produced using the aforementioned strategy, for which the oxygen content, microstructure, and mechanical properties were measured. The results revealed that the oxygen content can be precisely controlled, which can achieve an ultra-high tensile strength of close to 1100 MPa, at no expense of elongation-to-failure, with incorporating 0.87 wt% oxygen. An analysis showed that the strength contribution from oxygen follows the Labusch law. These findings offer a novel approach to design high-performance Ti alloys with non-toxic and cheap elements.http://www.sciencedirect.com/science/article/pii/S0264127523002125TitaniumOxides decompositionHigh oxygenIn-situSolid solution strengthening |
| spellingShingle | Xianzhe Shi Xiuxia Wang Biao Chen Junko Umeda Abdollah Bahador Katsuyoshi Kondoh Jianghua Shen Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study Materials & Design Titanium Oxides decomposition High oxygen In-situ Solid solution strengthening |
| title | Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study |
| title_full | Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study |
| title_fullStr | Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study |
| title_full_unstemmed | Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study |
| title_short | Precision control of oxygen content in CP-Ti for ultra-high strength through titanium oxide decomposition: An in-situ study |
| title_sort | precision control of oxygen content in cp ti for ultra high strength through titanium oxide decomposition an in situ study |
| topic | Titanium Oxides decomposition High oxygen In-situ Solid solution strengthening |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523002125 |
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