Hot deformation and processing map of GH3535 superalloy
(Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)
Abstract: The hot deformation behavior of GH3535 superalloy was investigated by hot compression tests in the temperature range of 1000-1200 °C and strain rate range of 0.01-50 s-1. The activation energy is about 356.3 kJ/mol, and the flow curves and processing map were developed on the basis of experimental data. The processing map exhibits a stable domain which occurs in the strain rate range of 0.01-1 s-1 at all the temperatures and a instable domain which occurs in the strain rate range of 1-50 s-1. Microstructural observations reveal that the full dynamic recrystallization (DRX) occurs in the conditions of (1150 °C, 0.01 s-1), (1200 °C, 0.01 s-1) and (1200 °C, 0.1 s-1) with different grain sizes and undissolved carbides. The flow localization and cracks occur in the regime of flow instability.
Key words: GH3535 alloy; hot deformation; dynamic recrystallization; carbide; processing map