| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
2021 Technical Division Student Poster Contest
|
| Presentation Title |
Mechanical Behavior of Thermally Stable, Hierarchical Ni-Y Alloys |
| Author(s) |
Shruti Sharma, Samuel Moehring, Saurabh Sharma, Kiran Solanki, Pedro D Peralta |
| On-Site Speaker (Planned) |
Shruti Sharma |
| Abstract Scope |
Microstructure refinement and alloy additions are potential routes to increase the high temperature performance of existing metallic alloys. Nanocrystalline (NC) metallic alloys with immiscible second phases, e.g., Cu-10Ta, exhibit improvements over microstructurally unstable NC metals and their coarse-grained counterparts. However, matrices with higher melting points must be considered. Ni-Y alloys synthesized via arc-melting were studied for this purpose. Samples were heat-treated to study microstructural stability and characterized using WDS for local composition, SAXS for particle size distribution and spacing, and EBSD for local crystallography. Alloys had a stable, hierarchical microstructure with ultrafine eutectic of ~300 nm, dendritic arm spacing of ~10 µm and grain size ~200 μm. Uniaxial compression performed at 25 and 600 °C and room temperature hardness tests revealed that yield strength and microhardness of alloys with small amounts of Y (0.5-1wt%) were comparable to Ni-superalloys, due to the hierarchical microstructure and potential presence of nanoscale intermetallic precipitates. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Mechanical Properties, Other |