About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
High-throughput Oxidation of Additively Manufactured Refractory High Entropy Alloys |
Author(s) |
Michael Niezgoda, Michael Moorehead, Chuan Zhang, Adrien Couet, Dan Thoma |
On-Site Speaker (Planned) |
Michael Niezgoda |
Abstract Scope |
The Optomec LENS MR7 was used for a high throughput (HT) fabrication of twenty-five sample array with varying compositions of six elements: Tantalum, Niobium, Molybdenum, Titanium, Chromium, and Aluminum. With a unified set of build parameters, all twenty-five samples were built up to approximately one centimeter cubed to provide sufficient surface area for meaningful oxidation testing. After printing, samples were ground to a common level and given a homogenization treatment of 1500C for 24 hours in an ultra-high vacuum furnace. Prior to oxidation, EDS mapping and XRD analysis was performed, and the samples showed uniform compositions of mostly BCC character. High-Throughput oxidation was carried out at 1000 degrees Celsius for three hours in a continuously refreshed dry air atmosphere. Samples displayed a wide range of protective capabilities on a single plate, permitting rapid interrogation methodology of many alloys for oxidation resistance of designed refractory HEA’s influenced by thermodynamic simulation. |
Proceedings Inclusion? |
Undecided |