| Microstructures and Creep Behavior of a Directionally Solidified NiAl-Fe(Nb) Multiphase Intermetallic Alloy |
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| 作者姓名： | YihuiQI JiantingGUO等 |
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| 作者单位： | DepartmentofSuperalloys,InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016,China |
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| 基金项目： | 国家自然科学基金，National Advanced Materials Committee of China fund |
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| 摘 要： | The microstrucure and creep behavior of a DS NiAl-Fe(Nb) multiphase intermetallic alloy have been investigated,This alloy exhibits dedritic structure ,in which dendritic arm is β-(Ni,Fe)(Fe,Al) phase surrounded by interdendritic region of γ′/γ phase ,The results of the creep test indicated that all of the creep curves have similar characteristic,which is a short primary creep stage and a dominant steady state crepp stage ,and the creep strain ranges from 18% to 52%,The apparent stress exponent and the apparent activation energy were analyzed and discussed,The mechanism of the creep deformation was also analyzed by the observation of TEM.
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| 关 键 词： | 直接凝固 NiAl 多相金属间合金 显微结构 蠕变行为 |
Microstructures and Creep Behavior of a Directionally Solidified NiAl-Fe(Nb) Multiphase Intermetallic Alloy |
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| Yihui QI,Jianting GUO,Chuanyong CUI.Microstructures and Creep Behavior of a Directionally Solidified NiAl-Fe(Nb) Multiphase Intermetallic Alloy[J].Journal of Materials Science & Technology,2003,19(1):59-62. |
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| Authors: | Yihui QI Jianting GUO Chuanyong CUI |
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| Affiliation: | Department of Superalloys, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China\noindent |
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| Abstract: | The microstructure and creep behavior of a DS NiAl-Fe(Nb) multiphase intermetallic alloy have been investigated. This alloyexhibits dendritic structure, in which dendritic arm isβ-(Ni,Fe)(Fe,Al) phase surrounded by interdendritic region ofγ'/γ phase.The results of the creep test indicated that all of the creep curves have similar characteristic, which is a short primary creepstage and a dominant steady state creep stage, and the creep strain ranges from 18% to 52%. The apparent stress exponentand the apparent activation energy were analyzed and discussed. The mechanism of the creep deformation was also analyzedby the observation of TEM. |
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| Keywords: | NiAl Multiphase intermetallic alloy Microstructure Creep |
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