About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
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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 |
Strategies for Improving the High Temperature Oxidation Behavior of Multi-Principal Element Alloys |
Author(s) |
Mark L. Weaver, Michael J Pavel |
On-Site Speaker (Planned) |
Mark L. Weaver |
Abstract Scope |
Multi-principal element alloys (MPEAs) are a new innovative class of materials which generally contain at least four or more principal metallic elements without any clear base element. These alloys have a high entropy of mixing which is said to suppress the formation of deleterious topologically close packed phases or intermetallic compounds and to stabilize solid solution phases with high symmetry face-centered cubic, body-centered- cubic, or hexagonal close packed crystal structures. Some potential benefits of MPEAs include an increased alloying window, slowed diffusivities, higher potential tolerance to defects, and highly tailorable microstructures. This talk will consider the development of several two-phase high entropy superalloys and will highlight the impacts of microstructure and chemistry on high temperature oxidation behavior. It will discuss the impacts of systematic variations of precipitate volume fractions and sizes via heat treatment and the importance of obtaining a homogeneous microstructure when doing any high throughput alloy screening. |