The effect of the γ′ morphology on stress-rupture properties of IC21 alloy at 850°C
| Autor: | Songyu Li, H. Zhang, Shengkai Gong, Jie-min Zhou, Y. F. Liang |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Shearing (physics)
Morphology (linguistics) Materials science Mechanical Engineering Alloy Metallurgy engineering.material Condensed Matter Physics Microstructure Deformation mechanism Mechanics of Materials Transmission electron microscopy engineering General Materials Science Elongation Composite material Single crystal |
| Zdroj: | Materials Research Innovations. 19:S98-S101 |
| ISSN: | 1433-075X 1432-8917 |
| DOI: | 10.1179/1432891715z.0000000001567 |
| Popis: | In this study, the effect of the γ′ morphology on stress-rupture properties of single crystal alloy IC21 at 850°C 500 MPa− 1 was investigated. Special heat treatment (HT) with different cooling procedure and holding temperature were conducted to samples before the stress-rupture test. The longest stress-rupture life and the smallest elongation were obtained after HT3 treatment. Microstructure examination shows that micro-raft was built during intermediate temperature stress-rupture test after HT3 treatment. Moreover, transmission electron microscopy (TEM) analysis of the stress-ruptured samples reviews that with the change of the γ′ morphology, the dominant deformation mechanism has been changed from the shearing of the super-partial dislocations to the Orowan by-passing mechanism. |
| Databáze: | OpenAIRE |
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