| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
D-30: Solidification Microstructures in Mixtures of Superalloys 625 and 718 |
| Author(s) |
Kyrus Tsai, Kyle Wade, Lesley D. Frame, Rainer J. Hebert, Mark Aindow |
| On-Site Speaker (Planned) |
Kyrus Tsai |
| Abstract Scope |
The compositional gradients across fusion welds between dissimilar materials can lead to complex transitions in solidification microstructures and material properties. To develop an understanding of these phenomena it can be helpful to study alloys with intermediate compositions. Here we illustrate this approach by considering two Ni-based superalloys: 625 and 718. Arc melting was used to produce button ingots from mixtures of the two alloys, and the microstructures were assessed using x-ray diffraction, scanning electron microscopy, transmission electron microscopy and focused ion beam techniques. Data on the character, morphology and chemical compositions of the phases formed in these samples are compared with those from two button ingots produced by remelting the pure superalloys under the same conditions. The advantages and limitations of this approach for interpreting fusion weld microstructures will be discussed.
“Distribution A. Approved for public release: distribution unlimited. (AF AFRL-2024-3422) Date Approved 06-27-2024” |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Solidification, Other |