| 镍基单晶高温合金相界与界面位错的相互作用 |
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| 引用本文： | 丁青青,李吉学,张泽. 镍基单晶高温合金相界与界面位错的相互作用[J]. 电子显微学报, 2017, 36(2). DOI: 10.3969/j.issn.1000-6281.2017.02.001 |
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| 作者姓名： | 丁青青 李吉学 张泽 |
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| 作者单位： | 浙江大学 电子显微镜中心 材料科学与工程学院,浙江 杭州,310027 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 本文通过在透射电子显微镜(TEM)中应用原位加热台,对镍基单晶高温合金进行了变温加热,观察研究了γ/γ′相界面与界面位错的相互作用.发现相界面迁移过程中不改变界面位错网络的位错密度,只会改变位错网络形态.研究发现界面位错的弹性应力场能够阻碍γ′相长大,使界面产生向γ′相凹进的凹槽.
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| 关 键 词： | 镍基单晶高温合金 相界面 界面位错 原位TEM |
Interaction between phase boundary and interfacial dislocations in nickel based single crystalline superalloy |
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| DING Qing-qing,LI Ji-xue,ZHANG Ze. Interaction between phase boundary and interfacial dislocations in nickel based single crystalline superalloy[J]. Journal of Chinese Electron Microscopy Society, 2017, 36(2). DOI: 10.3969/j.issn.1000-6281.2017.02.001 |
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| Authors: | DING Qing-qing LI Ji-xue ZHANG Ze |
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| Abstract: | In situ study on the interaction betweenγ/γ′phase boundary and interfacial dislocations in nickel based single crystalline superalloy in a transmission electron microscope ( TEM) was carried out on a heating holder. The results obtained during heating and cooling process indicated that migration of phase boundary can change the location and shape of the interfacial dislocations but has no effects on its density. In addition, the growth of γ′phase could be hindered by the elastic field of interfacial dislocations. This would result in a different growth rate of the γ′precipitate and grooves on the phase boundary. |
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| Keywords: | nickel based single crystal superalloy phase boundary interfacial dislocation in-situ TEM |
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