Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C
Ni3Al-based single crystal alloy IC6SX was prepared by seed crystal method. The effect of different stress conditions on creep behavior of this alloy at 980°C was investigated. The results showed that the creep life of this alloy at 980°C decreased significantly with the increase of stress. When the...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2020/8844874 |
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| _version_ | 1850166092707659776 |
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| author | Liwu Jiang Xuezheng Dou Meiling Wu |
| author_facet | Liwu Jiang Xuezheng Dou Meiling Wu |
| author_sort | Liwu Jiang |
| collection | DOAJ |
| description | Ni3Al-based single crystal alloy IC6SX was prepared by seed crystal method. The effect of different stress conditions on creep behavior of this alloy at 980°C was investigated. The results showed that the creep life of this alloy at 980°C decreased significantly with the increase of stress. When the stress increased from 180 MPa to 230 MPa, the creep life dropped from 245.5 h to 69.3 h, and the steady-state creep rate increased slightly but not significantly. Meanwhile, the morphology of γ′ phase and dislocation after creep were studied. The results showed that with the increase of stress, the density of dislocations in the γ′ phase increased gradually, the strength of this alloy decreased gradually, so the creep life decreased significantly. The Y-NiMo phase resolved from the γ phase decreased gradually as the creep life decreased. The creep experiment of the alloy was carried out at 980°C. Due to the higher temperature, the diffusion of atoms in this alloy became faster. Deformation was not only caused by the slippage of dislocations in the crystal but also by the diffusion of atoms. Therefore, the creep mechanism of single crystal alloy IC6SX at this temperature is a mixed mechanism of dislocation glide and diffusion. |
| format | Article |
| id | doaj-art-e44f360d7bfb499b94316dd37ec78de5 |
| institution | OA Journals |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-e44f360d7bfb499b94316dd37ec78de52025-08-20T02:21:34ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2020-01-01202010.1155/2020/88448748844874Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°CLiwu Jiang0Xuezheng Dou1Meiling Wu2National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing Institute of Aeronautical Materials, Beijing 100095, ChinaNi3Al-based single crystal alloy IC6SX was prepared by seed crystal method. The effect of different stress conditions on creep behavior of this alloy at 980°C was investigated. The results showed that the creep life of this alloy at 980°C decreased significantly with the increase of stress. When the stress increased from 180 MPa to 230 MPa, the creep life dropped from 245.5 h to 69.3 h, and the steady-state creep rate increased slightly but not significantly. Meanwhile, the morphology of γ′ phase and dislocation after creep were studied. The results showed that with the increase of stress, the density of dislocations in the γ′ phase increased gradually, the strength of this alloy decreased gradually, so the creep life decreased significantly. The Y-NiMo phase resolved from the γ phase decreased gradually as the creep life decreased. The creep experiment of the alloy was carried out at 980°C. Due to the higher temperature, the diffusion of atoms in this alloy became faster. Deformation was not only caused by the slippage of dislocations in the crystal but also by the diffusion of atoms. Therefore, the creep mechanism of single crystal alloy IC6SX at this temperature is a mixed mechanism of dislocation glide and diffusion.http://dx.doi.org/10.1155/2020/8844874 |
| spellingShingle | Liwu Jiang Xuezheng Dou Meiling Wu Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C International Journal of Photoenergy |
| title | Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C |
| title_full | Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C |
| title_fullStr | Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C |
| title_full_unstemmed | Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C |
| title_short | Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C |
| title_sort | effect of stress on creep behavior of single crystal alloy ic6sx at 980°c |
| url | http://dx.doi.org/10.1155/2020/8844874 |
| work_keys_str_mv | AT liwujiang effectofstressoncreepbehaviorofsinglecrystalalloyic6sxat980c AT xuezhengdou effectofstressoncreepbehaviorofsinglecrystalalloyic6sxat980c AT meilingwu effectofstressoncreepbehaviorofsinglecrystalalloyic6sxat980c |