| Direct evidence for competition between metastable ω and equilibrium α phases in aged β-type Ti alloys |
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| 作者姓名： | Shun Guo ;Qing-Kun Meng ;Hong-Ping Li ;Xin-Qing Zhao |
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| 作者单位： | [1]Institute for Advanced Materials, School of Materials Scienceand Engineering, Jiangsu University, Zhenjiang 212013, China; [2]School of Materiais Science and Engineering, Beijing Universityof Aeronautics and Astronautics, Beijing 100191, China |
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| 基金项目： | financially supported by the National Natural Science Foundation of China(Nos.51271010 and 21301075);the Senior Intellectuals Fund of Jiangsu University(13JDG098) |
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| 摘 要： | Precipitation response of a recently developed b-type Ti–25Nb–2Mo–4Sn alloy(wt%) during aging was investigated in detail. Experimental results indicate that the metastable ω or equilibrium α phase can form alternatively even under the same aging condition, depending on the condition prior to the aging, i.e., solution treatment or severe cold rolling. This provides, for the first time, the direct evidence for the competition between ω and α in aged β-type Ti alloys. This peculiar aging response is found to be closely related to high-density dislocations and grain boundaries which suppress the formation of ω but favor the precipitation of fine a phase.
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| 关 键 词： | β-Type Ti alloy Phase competition ω Phase α Phase |
Direct evidence for competition between metastable ω and equilibrium α phases in aged β-type Ti alloys |
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| Shun Guo,;Qing-Kun Meng,;Hong-Ping Li,;Xin-Qing Zhao.Direct evidence for competition between metastable ω and equilibrium α phases in aged β-type Ti alloys[J].Rare Metals,2014,33(4):390-393. |
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| Authors: | Shun Guo Qing-Kun Meng Hong-Ping Li Xin-Qing Zhao |
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| Affiliation: | 1. Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
2. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China
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| Abstract: | Precipitation response of a recently developed β-type Ti–25Nb–2Mo–4Sn alloy (wt%) during aging was investigated in detail. Experimental results indicate that the metastable ω or equilibrium α phase can form alternatively even under the same aging condition, depending on the condition prior to the aging, i.e., solution treatment or severe cold rolling. This provides, for the first time, the direct evidence for the competition between ω and α in aged β-type Ti alloys. This peculiar aging response is found to be closely related to high-density dislocations and grain boundaries which suppress the formation of ω but favor the precipitation of fine α phase. |
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| Keywords: | β-Type Ti alloy Phase competition o~ Phase at Phase |
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