| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VI
|
| Presentation Title |
Effect of Aluminizing on the High-temperature Oxidation Behavior of an Alumina-forming Austenitic Stainless Steel and a Chromia-forming Ni Based Alloy |
| Author(s) |
Sedigheh Rashidi, Amit Pandey, Jung Pyung Choi, Rajeev K. Gupta |
| On-Site Speaker (Planned) |
Rajeev K. Gupta |
| Abstract Scope |
High-temperature oxidation resistance of Fe-Cr and Ni-Cr based alloys can be improved by adding Al to the alloy and therefor forming an external alumina scale. However, the amount of Al required to form thee alumina scale has been reported to deteriorate the mechanical properties of the alloy and therefore any surface modification technique able to enrich the surface by Al is deemed beneficial. In this study, the influence a reactive air aluminizing method was used to aluminize the surface of two alloys: 1) an alumina-forming austenitic stainless steel (AFA 25), and 2) Ni based chromia-forming alloy (H230). The high-temperature oxidation behavior of both as-received and aluminized alloys was investigated at 850 °C in dry air. X-ray diffraction analysis, scanning electron microscopy, and energy-dispersive
x-ray spectroscopy, performed on the oxide scales following high-temperature
oxidation tests, revealed the composition and structure of the scale on as-received and aluminized alloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |