| Influence of microstructure stability on creep properties of single crystal nickel base superalloys |
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| 引用本文： | 田素贵 孟凡来 杜洪强 王春涛 水丽 胡壮麒. Influence of microstructure stability on creep properties of single crystal nickel base superalloys[J]. 中国有色金属学会会刊, 2006, 16(A03): 1897-1900 |
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| 作者姓名： | 田素贵 孟凡来 杜洪强 王春涛 水丽 胡壮麒 |
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| 作者单位： | [1]Department of Materials Science, Shenyang University of Technology, Shenyang 110023, China [2]Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| 基金项目： | Foundation item： Project （50571070） supported by the National Natural Science Foundation of China; project（2004C004） supported by Education Foundation of Liaoning Province, China |
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| 摘 要： | The influence of microstructure stability on the creep properties of single crystal nickel-based superalloys was investigated by means of the measurement of the creep curves and microstructure observation. Results show that the superalloy with 4%（mass fraction）W in Ni-AI-Cr-Ta-Co-5.5%Mo-x%W systems displays a better microstructure stability, but the β phase is precipitated in the superalloy with 6% W during aging. The strip-like μ phase is precipitated to be parallel or perpendicular to each other along the 〈110〉 orientation, and grown into the slice-like morphology along the { 111 } planes. The superalloy with 4%W displays a better creep rupture lifetime under the applied stress of 200 MPa at 982 ℃, but the creep lifetime of alloy is obviously decreased with the increase of the element W content up to 6%. The fact that the μ phase is precipitated in the superalloy with 6% W during applied stress and unstress aging results in the appearance of the poor regions for the refractory elements. This is one of the main reasons for reducing the creep rupture lifetime of the superalloy.
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| 关 键 词： | 镍 单晶结构 超合金 微观结构 时效分析 |
| 收稿时间： | 2006-07-28 |
| 修稿时间： | 2006-09-15 |
Influence of microstructure stability on creep properties of single crystal nickel base superalloys |
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| TIAN Su-gui, MENG Fan-lai, DU Hong-qiang , WANG Chun-tao, SHUI Li , HU Zhuang-qi. Influence of microstructure stability on creep properties of single crystal nickel base superalloys[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(A03): 1897-1900 |
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| Authors: | TIAN Su-gui MENG Fan-lai DU Hong-qiang WANG Chun-tao SHUI Li HU Zhuang-qi |
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| Abstract: | |
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| Keywords: | single crystal nickel-based superalloy microstructure stability creep aging topologically-closed-packed phase |
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