| 镍基双晶高温合金定向凝固过程中的竞争生长 |
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| 引用本文： | 卢琦,李金国,金涛,周亦胄,孙晓峰,胡壮麒.镍基双晶高温合金定向凝固过程中的竞争生长[J].金属学报,2011(6):641-648. |
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| 作者姓名： | 卢琦 李金国 金涛 周亦胄 孙晓峰 胡壮麒 |
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| 作者单位： | 中国科学院金属研究所; |
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| 基金项目： | 国家重点基础研究发展计划项目2010CB631206; 国家自然科学基金项目50931004,U1037601和50971124资助~~ |
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| 摘 要： | 研究了镍基双晶高温合金定向凝固过程中的竞争生长.实验结果表明：当原始籽晶一次枝晶方向均平行于热流方向且二次枝晶取向不同时，定向凝固过程中双晶共存，但双晶的界面存在波动，抽拉速率对其影响不大.当原始籽晶一次枝晶(001])异面并保持其中一组二次枝晶取向(010]相同时，双晶竞争生长过程是一个三维竞争生长过程.晶粒竞争...
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| 关 键 词： | 高温合金 定向凝固 竞争生长 枝晶生长 |
COMPETITIVE GROWTH IN BI-CRYSTAL OF Ni-BASED SUPERALLOYS DURING DIRECTIONAL SOLIDIFICATION |
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| LU Qi,LI Jinguo,JIN Tao,ZHOU Yizhou,SUN Xiaofeng,HU Zhuangqi Institute of Metal Research,Chinese Academy of Sciences,Shenyang.COMPETITIVE GROWTH IN BI-CRYSTAL OF Ni-BASED SUPERALLOYS DURING DIRECTIONAL SOLIDIFICATION[J].Acta Metallurgica Sinica,2011(6):641-648. |
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| Authors: | LU Qi LI Jinguo JIN Tao ZHOU Yizhou SUN Xiaofeng HU Zhuangqi Institute of Metal Research Chinese Academy of Sciences Shenyang |
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| Affiliation: | LU Qi,LI Jinguo,JIN Tao,ZHOU Yizhou,SUN Xiaofeng,HU Zhuangqi Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016 |
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| Abstract: | Single crystal nickel-based superalloys,which offer improved creep-rupture,fatigue, oxidation and coating properties,have been widely applied in turbine blades and vanes.In general, the single crystal structure is produced through competitive grain growth by directional solidification technology.However,in actual directional solidification process,the orientations of the primary and secondary dendrites are random due to the randomness of the grain nucleation.Therefore,the actual competitive grain growth dur... |
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| Keywords: | superalloy directional solidification competitive growth dendrite growth |
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