Hot Deformation Behavior via Isothermal Compression and Constitutive Model of GH2132 Superalloy
Guardado en:
| Publicado en: | Materials vol. 18, no. 24 (2025), p. 5650-5667 |
|---|---|
| Autor principal: | |
| Otros Autores: | , , , |
| Publicado: |
MDPI AG
|
| Materias: | |
| Acceso en línea: | Citation/Abstract Full Text + Graphics Full Text - PDF |
| Etiquetas: |
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Resumen: | GH2132, an Ni–Cr–Fe-based superalloy for aero-engine components, exhibits hot workability that is highly sensitive to processing parameters. The hot deformation behavior of GH2132 alloy was investigated via isothermal compression (Gleeble-3500-GTC) over 850–1100 °C and 0.001–10 s−1, combined with optical microscopy and EBSD characterization. A strain-compensated Arrhenius-type hyperbolic-sine model was established, achieving high predictive accuracy (R2 = 0.9916; AARE = 3.86%) with an average activation energy Q = 446.2 kJ·mol−1. Flow stress decreases with increasing temperature and increases with strain rate, while microstructural softening transitions from dynamic recovery to complete dynamic recrystallization at higher temperatures and lower strain rates. Three-dimensional power-dissipation and hot-processing maps (Dynamic Materials Model) delineate safe domains and instability regions, identifying an optimal window of 1000–1100 °C at 0.001–0.01 s−1 and instability at 850–900 °C with 0.01–0.1 s−1. These results provide guidance for selecting parameters for hot deformation behavior during thermomechanical processing of GH2132. |
|---|---|
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma18245650 |
| Fuente: | Materials Science Database |