| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in High-Temperature Oxidation and Degradation of Materials for Harsh Environments: A SMD and FMD Symposium Honoring Brian Gleeson
|
| Presentation Title |
H-11: Effect of Microstructures on Spallation Resistance of Oxide Scale Formed on 2.25Cr-1Mo Steels in Water Vapor at 600°C |
| Author(s) |
Taisei Kurosawa, Shigenari Hayashi, Yoneda Suzue, Kyohei Nomura, Yohei Sakakibara, Yoshiki Shioda |
| On-Site Speaker (Planned) |
Taisei Kurosawa |
| Abstract Scope |
2.25Cr-1Mo steels are widely used such as boiler tubes in thermal power plants and have different substrate structures depending on the application. At present, the influence of the substrate structure of 2.25Cr-1Mo steels on the steam oxidation behavior has not been clarified. In this study, the influence of the substrate microstructure on spallation resistance of the oxide scale was investigated through cyclic oxidation in water vapor at 600℃. All samples formed a duplex oxide scale consisting of the outer Fe3O4 and inner (Fe, Cr)3O4. The oxide scale formed on the steels with bainite or martensite structures was spalled at the scale/substrate interface. The rough and uneven oxide scale/substrate interface was developed on the steels with ferrite-pearlite structure, whereas the interface formed on bainite or martensite steels was relatively flat. Such a roughness of the interface on ferrite-pearlite steels was considered to improve the spallation resistance of oxide scale. |