About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
|
| Presentation Title |
High-temperature influence on the interfacial performance of additively-graded GRCop-42 to Inconel 625 |
| Author(s) |
Madeline Selby, Alex Lark, Mo-Rigen He, Li Ma, Gianna M Valentino, Kevin J Hemker |
| On-Site Speaker (Planned) |
Madeline Selby |
| Abstract Scope |
Surviving the extreme thermal conditions of liquid rocket combustion chambers requires complementary performance from materials with distinct thermomechanical properties. To bridge these differences, compositional gradients were fabricated between the high thermal conductivity alloy GRCop-42 and the high mechanical strength alloy Inconel 625. This study explores how variations in interfacial length scale and geometry influence microstructural evolution and mechanical behavior. High-temperature tensile testing and thermal cycling of graded interfaces reveal the effects of symmetric versus asymmetric thermal gradients on deformation behavior and interfacial stability. Electron microscopy, EDS, and EBSD analyses of as-printed and fractured samples highlight microstructural complexity arising from thermal exposure and compositional mixing. Interfaces with controlled gradient widths and tailored geometries were fabricated to evaluate the role of spatial design in interface performance and to maximize interfacial strength while minimizing interfacial cracking. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, |