About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond III
|
Presentation Title |
E-14: High Throughput Multi-principal Element Alloy Exploration Using a Novel Composition Gradient Sintering Technique |
Author(s) |
Brady Bresnahan, David Poerschke |
On-Site Speaker (Planned) |
Brady Bresnahan |
Abstract Scope |
Exploration of multi-principal element alloys (MPEAs) requires a high throughput process to navigate the vast composition space. One such process uses spark plasma sintering (SPS) to introduce a composition gradient along the shortest dimension (5 mm) of a bulk sample. A novel technique was developed to fabricate gradients along the longest dimension of the sample (20 mm), allowing for more compositions in the gradient. The tooling was first validated with binary NiCu and MoNb gradients and was later used to fabricate a Hf gradient in MoNbTaWHf. The resulting gradients were annealed to form solid solutions and characterized by energy dispersive spectroscopy and nanoindentation hardness mapping. The functionally graded MPEAs will allow for high throughput exploration of MPEA composition and surface modification combinations to improve surface properties for aerospace applications. With SPS being a widely applicable densification process, this gradient technique could allow high throughput exploration of other material systems. |