| Effects of Alloying Elements on the Volume Fraction of Ordered α2 Phase Precipitated in Ti-Al-Sn-Zr Alloys |
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| 作者姓名： | Jun ZHANG Na PENG Xinan WANG Li LI Qingjiang WANG |
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| 作者单位： | [1]Department of Materials Science and Engineering, Shenyang University, Shenyang 110044, China [2]Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China |
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| 基金项目： | The project was supported by the National Natural Science Foundation of China (50471085). |
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| 摘 要： | An ideal method has been established for calculating the precipitation of α2 ordered phase in near-α titanium alloys based on the theory on the critical electron concentration for the precipitation of α2 ordered phase in near-α titanium alloys. With complete precipitation of α2 phase in near-α titanium alloys, the alloys can be considered to be composed of two parts： （1） the α2 ordered phase with the stoichiometric atomic ratio of Ti3X; （2） the disorder solid solution with the critical composition in which the α2 ordered phase is just unable to precipitate. By using this method, the volume fractions of α2 ordered phase precipitated in Ti-Al, Ti-Sn, Ti-Al-Sn-Zr alloys with various AI, Sn and/or Zr contents have been calculated. The influences of AI and Sn on the precipitation of α2 ordered phase are discussed. The calculating results show substantial agreement with the experimental ones.
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| 关 键 词： | 成合金元素 钛合金 Ti-Al-Sn-Zr合金 沉淀 体积分数 α2有序相 电子密度 |
| 收稿时间： | 2006-06-30 |
| 修稿时间： | 2006-06-13 |
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