About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Unraveling the Micromechanical Origins of Tensile-Compressing Asymmetry in Inconel 718 |
| Author(s) |
Dasith Daksitha Amarasinghe, Ajit Achuthan |
| On-Site Speaker (Planned) |
Dasith Daksitha Amarasinghe |
| Abstract Scope |
Inconel 718, a nickel-based superalloy, is widely valued for its exceptional mechanical strength, corrosion resistance, and thermal stability, making it essential for moderate-temperature applications in the aerospace and power generation industries. However, the alloy exhibits a pronounced asymmetry between its tensile and compressive responses at both room and service temperatures. This study investigates the microstructural origins of this asymmetry by experimentally capturing the evolution of microscopic deformation in situ. Specifically, it examines how deformation mechanisms—such as lattice slip, twinning, and phase interactions—differ under tensile versus compressive loading through detailed microstructural characterization and mechanical testing. The characterization and testing are conducted at different temperatures to determine the influence of temperature on the deformation mechanisms and the tension-compression asymmetry. The influence of various precipitate phases on the deformation mechanisms is also studied. The insights gained may inform the optimization of Inconel 718 for applications requiring a balance of mechanical performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, |