Characterization of the Hot Deformation Behavior of a Newly Developed Nickel-Based Superalloy

Journal Article · Sun Apr 15 04:00:00 EDT 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3270-5· OSTI ID:22860570

Shi, Zhaoxia; Yan, Xiaofeng; Duan, Chunhua ^[1]; Tang, Cunjiang ^[2]; Pu, Enxiang ^[3]

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1. Central Iron and Steel Research Institute, High Temperature Materials Research Institute (China)
2. Beijing National Innovation Institute of Lightweight Ltd (China)
3. Central Iron and Steel Research Institute (China)

To clarify the microstructural evolution and hot workability of GH4282 during hot forming processes, the hot deformation behavior of this superalloy was investigated by isothermal compression tests in the temperature interval of 950-1210 °C and the strain rate range of 0.01-10 s{sup −1} with a true strain of 0.7. The results show that the flow stresses decrease with an increase in the deformation temperature and a decrease in the strain rate. The characteristic of dynamic recrystallization is revealed by the flow curves. The variation rule of the flow stress can be well described by the hyperbolic sine type equation, and the thermal deformation activation energy is determined to be 498.118 kJ/mol. The optimum hot working parameters are 1100-1180 °C and 0.01-0.1 s{sup −1}, under which the fine and uniform microstructure can be obtained.

• OSTI ID: 22860570
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 4 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DEFORMATION
FLOW STRESS
HEAT RESISTING ALLOYS
HOT WORKING
MICROSTRUCTURE
NICKEL ALLOYS
PROCESSING
RECRYSTALLIZATION
STRAIN RATE