| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
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Advances in High-Temperature Oxidation and Degradation of Materials for Harsh Environments: A SMD and FMD Symposium Honoring Brian Gleeson
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| Presentation Title |
H-14: Internal Oxidation Behavior of Fe-3at%Si-X Alloys at 1000°C |
| Author(s) |
Koki Ishikura, Shigenari Hayashi, Suzue Yoneda, Hiroshi Tanei, Takumi Nishimoto, Aya Harashima |
| On-Site Speaker (Planned) |
Koki Ishikura |
| Abstract Scope |
The internal oxidation behavior of Fe-based alloys depends on the phase of matrix, because diffusion coefficients of oxygen and solute atoms, and oxygen solubility in α- and γ-Fe depend on the matrix. The α-γ phase transformation is commonly observed on Fe-based alloys and occurs depending on alloy compositions and temperature. Thus, this can be happened during internal oxidation. However, the effect of the phase transformation on the internal oxidation behavior of Fe-based alloys has not been clarified. In this study, the internal oxidation behavior of Fe-3at%Si-X alloys, which undergo the α-γ phase transformation during internal oxidation at 1000℃ was investigated. The internal oxidation rate increased when α-γ phase transformation was occurred accompanied with an internal oxidation. Faster internal oxidation kinetics can be explained by smaller γ grain structure at the front of the internal oxidation zone, which was formed by the phase transformation. |