| 全层状TiAl合金层片生长及其影响因素 |
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| 引用本文： | 刘文胜,黄伯云,唐建成,周科朝,贺跃辉,刘咏.全层状TiAl合金层片生长及其影响因素[J].中国有色金属学报,2003,13(1):153-156. |
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| 作者姓名： | 刘文胜 黄伯云 唐建成 周科朝 贺跃辉 刘咏 |
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| 作者单位： | 中南大学,粉末冶金国家重点实验室,长沙,410083 |
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| 基金项目： | 国家自然科学基金重大资助项目 (5 9895 15 0 )，国家 863计划资助项目 (715 0 0 5 0 0 40 ) |
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| 摘 要： | 利用光学显微镜(OM)和TEM，研究了全层状TiAl合金的层片间距的影响因素及与各因素的关系。实验结果表明，全层状TiAl合金的层片间距与冷却速度和合金中铝含量有关，层片间距与冷却速度呈反比关系，并随着合金中铝含量的增加而增加。同时，以层片生长的台阶机制为基础，推导出了全层状TiAl合金在连续冷却过程中层片间距的数学表达式，推导结果与实验结果相符。
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| 关 键 词： | 全层状TiA1合金 层片生长 层片间距 冷却速度 铝含量 高温结构材料 |
| 文章编号： | 1004-0609(2003)01-0153-04 |
| 修稿时间： | 2002年5月24日 |
Lamellae growth in fully lamellar TiAl alloys and its factors |
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| LIU Wen-sheng,HUANG Bai-yun,TANG Jian-cheng,ZHOU Ke-chao,HE Yue-hui,Li u Yong.Lamellae growth in fully lamellar TiAl alloys and its factors[J].The Chinese Journal of Nonferrous Metals,2003,13(1):153-156. |
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| Authors: | LIU Wen-sheng HUANG Bai-yun TANG Jian-cheng ZHOU Ke-chao HE Yue-hui Li u Yong |
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| Abstract: | It is important to control the lamellar spacing of fully la mellar TiAl alloy for improving its mechanical properties. The factors affecting the lamellar spacing of fully lamellar TiAl alloy and the dependence of the lam ellar spacing on the factors were investigated by means of OM and TEM. The resul ts show that the lamellar spacing depends on cooling rate and Al content. The la mellar spacing is inversely proportional to cooling rate and increases with the increase of Al content. At the same time, a theoretical expression of the lamell ar spacing of fully lamellar TiAl alloy during continuous cooling has been deriv ed on the basis of the ledge mechanism of lamellae growth. The theoretical resul ts are in agreement with the experimental findings. |
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| Keywords: | TiAl lamellar spacing cooling rate Al content |
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