About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Physical Thermo-Mechanical Simulation: Laboratory Advances and In-Situ Diffraction Methods
|
| Presentation Title |
Heating Rate Effects in High-Temperature Mechanical Testing of Wrought and Additively Manufactured Inconel 718 |
| Author(s) |
Isabelle LaManna, Jason Stone, Gianna Valentino |
| On-Site Speaker (Planned) |
Isabelle LaManna |
| Abstract Scope |
Conventional high-temperature mechanical testing requires slow heating rates and extended soak times that may alter the microstructure before mechanical testing. This study investigates the influence of heating rate on the mechanical behavior of wrought and laser-powder bed fusion (LPBF) Inconel 718 (IN718). Tensile testing was performed at 700, 950, and 1100°C using heating rates of 0.5, 15, and 50°C/s, with non-loaded samples given identical thermal profiles to isolate heating-rate-induced microstructural evolution. Wrought IN718 exhibited increasing yield strength with increasing heating rate, whereas LPBF IN718 displayed the opposite trend, highlighting contrasting responses to heating rate and thermal history. The contrasting responses are hypothesized to arise from differences in the initial microstructure, with wrought IN718 containing the conventionally aged microstructure and LPBF IN718 retaining its as-built condition. These results demonstrate that heating rate is a critical experimental variable for high-temperature mechanical testing of materials with thermally evolving microstructures, particularly heterogeneous microstructures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, |