Hot Deformation Behavior via Isothermal Compression and Constitutive Model of GH2132 Superalloy.
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| Title: | Hot Deformation Behavior via Isothermal Compression and Constitutive Model of GH2132 Superalloy. |
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| Authors: | Sun, Yue1,2 (AUTHOR), Cheng, Peng1,2 (AUTHOR) pengcheng080@163.com, Wang, Decheng1,2 (AUTHOR), Shao, Chenxi1 (AUTHOR), Cheng, Lu1 (AUTHOR) |
| Source: | Materials (1996-1944). Dec2025, Vol. 18 Issue 24, p5650. 17p. |
| Subjects: | Isothermal compression, Hot working, Recrystallization (Metallurgy), Arrhenius equation, Mechanical behavior of materials, Heat resistant alloys |
| Abstract: | 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. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | 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. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961944 |
| DOI: | 10.3390/ma18245650 |
