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A Two-Stage Constitutive Model and Microstructure Evolution Simulation of a Nickel-Based Superalloy during High Temperature Deformation.

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Title: A Two-Stage Constitutive Model and Microstructure Evolution Simulation of a Nickel-Based Superalloy during High Temperature Deformation.
Authors: Zhu, Qiang1 (AUTHOR), Chen, Linjun1 (AUTHOR), Chen, Gang1 (AUTHOR), Wang, Chuanjie1 (AUTHOR), Qin, Heyong2 (AUTHOR), Zhang, Peng1 (AUTHOR) pzhang@hit.edu.cn
Source: Journal of Materials Engineering & Performance. Apr2023, Vol. 32 Issue 8, p3378-3389. 12p.
Subjects: High temperatures, Microstructure, Strains & stresses (Mechanics), Heat resistant alloys, Material plasticity, Strain rate
Abstract: Nickel-based superalloys have been widely used in aerospace, warship, energy and other fields due to their unique mechanical and physical properties. High temperature compression experiments of a nickel-based superalloy have been carried out at various deformation temperatures and strain rates in the present study. The mechanical properties during high temperature compression experiments are strongly associated with the initial microstructure, deformation temperature and strain rate. Based on dislocation theory and dynamic recrystallization (DRX) kinetics, a two-stage constitutive model for the dynamic recovery stage and DRX stage is developed. The calculated values are in good agreement with the experimental ones, indicating that the established constitutive model has good accuracy. Cellular automaton simulation realized the visualization of the evolution process of recrystallized grains during high temperature compression deformation. DRX grains nucleate and grow gradually with increasing strain. As the deformation temperature increases and the strain rate decreases, DRX volume fraction gradually increases. The present study has important guiding significance for studying the plastic deformation behavior during high temperature deformation and promoting their related applications. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Nickel-based superalloys have been widely used in aerospace, warship, energy and other fields due to their unique mechanical and physical properties. High temperature compression experiments of a nickel-based superalloy have been carried out at various deformation temperatures and strain rates in the present study. The mechanical properties during high temperature compression experiments are strongly associated with the initial microstructure, deformation temperature and strain rate. Based on dislocation theory and dynamic recrystallization (DRX) kinetics, a two-stage constitutive model for the dynamic recovery stage and DRX stage is developed. The calculated values are in good agreement with the experimental ones, indicating that the established constitutive model has good accuracy. Cellular automaton simulation realized the visualization of the evolution process of recrystallized grains during high temperature compression deformation. DRX grains nucleate and grow gradually with increasing strain. As the deformation temperature increases and the strain rate decreases, DRX volume fraction gradually increases. The present study has important guiding significance for studying the plastic deformation behavior during high temperature deformation and promoting their related applications. [ABSTRACT FROM AUTHOR]
ISSN:10599495
DOI:10.1007/s11665-022-07347-6