| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
High Temperature Oxidation of Metals and Ceramics
|
| Presentation Title |
Alumina-scale Establishment Behavior on Ni-6Al-yCr-2X (y = 4, 6, 8; X = Nb, Ta, Re) Model Alloys during High-temperature Oxidation |
| Author(s) |
Rafael T. Rodriguez De Vecchis, Rishi Pillai, Brian Gleeson |
| On-Site Speaker (Planned) |
Rafael T. Rodriguez De Vecchis |
| Abstract Scope |
Due to its superior high-temperature properties, nickel-based superalloys continue to be a key material for a vast set of high-temperature applications, including aero-engine and power generation. During the last decades, new generations of these alloys with judiciously controlled chemistries have emerged. However, a fundamental understanding of the influence minor-element additions have on oxidation behavior is still not well established. Systematic studies are currently missing and contrary inferences on their overall oxidation impact continue to exist in the literature. The present work seeks to elucidate the effects that minor additions of Nb, Ta, and Re have on the oxidation behavior of alumina-scale forming, γ-Ni alloys. In particular, this investigation focuses on describing the nature of the so-called third-element effect and the influence these elements have on promoting internal-to-external alumina scale transition. |