About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Refractory High Entropy Alloys and Ceramics
|
| Presentation Title |
Ultrasonic atomization of a hafnium based refractory high-entropy alloy Ti20Zr20Nb20Hf20Ta20 |
| Author(s) |
Brendon Dodge, Suyash Niraula, Thomas Berfield, Justin Gillham |
| On-Site Speaker (Planned) |
Brendon Dodge |
| Abstract Scope |
High-entropy alloys pose challenges for conventional subtractive manufacturing processes due to the high hardness and low ductility of the material. Additive manufacturing introduces a solution to these challenges through selective laser melting, in which micron-scale particles of material are melted together, forming a solid part with the desired geometry. Ultrasonic atomization is an effective method for producing particles for selective laser melting; however, producing these particles poses a challenge based on the extreme alloy melting temperature and surface tension. For this research, an investigation is conducted to study the atomization behavior of a refractory high entropy alloy, Ti20Zr20Nb20Hf20Ta20, developed using a cold-crucible vacuum arc melting process followed by ultrasonic atomization to produce powders for additive manufacturing. Characterization of morphology and elemental distribution is performed using scanning electron microscopy and x-ray diffraction, grading the process for successfully creating Ti20Zr20Nb20Hf20Ta20 powders with predictable characteristics suitable for additive manufacturing. |