Hot Deformation Behavior and Dynamic Recrystallization Modeling and Simulation of GH6159 Superalloy

ZENG Xiang; LIAO Runze; XU Xuefeng; TU Qiqi; CHEN Xiaoxiao; LUO Jie; FAN Xu; HUANG Leheng; LIU Jie

doi:10.3969/j.issn.1674-6457.2025.07.021

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (7) : 193-205. DOI: 10.3969/j.issn.1674-6457.2025.07.021

Superalloy Forming

Hot Deformation Behavior and Dynamic Recrystallization Modeling and Simulation of GH6159 Superalloy

ZENG Xiang^1a,1b,*, LIAO Runze^1a, XU Xuefeng^1a, TU Qiqi², CHEN Xiaoxiao², LUO Jie², FAN Xu², HUANG Leheng^1a, LIU Jie^1a

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Abstract

The work aims to obtain the deformation behavior and microstructure evolution laws of GH6159 superalloy through hot compression experiments and microstructure analysis, to provide theoretical support for optimizing the hot working process. Thus, a study on microstructure evolution laws of GH6159 was carried out. Thermal compression experiments were carried out on GH6159 superalloy with a Thermecmastor-Z thermal simulation tester to obtain the stress-strain curves of the alloy at 0.1-10 s^-1 and 900-1 100 ℃. True stress-true strain curves were modified using frictional and deformation-thermal corrections formulae, and modified Arrhenius model and dynamic recrystallization (DRX) model were established. Meanwhile, the microstructure characteristics of specimens at different temperature and strain rates were analyzed by Electron Backscatter Diffraction (EBSD). Then, a finite element compression model of GH6159 superalloy was established. DRX behavior of GH6159 superalloy in the hot working process was predicted with the established DRX model. GH6159 superalloy exhibited an obvious flow softening phenomenon and a large amount of DRX appeared during hot deformation. Via simulation prediction and experimental comparison, DRX volume fractions were 81.3%, 83.7%, 78.5%, and 82.7% at 900 ℃-0.01 s^-1, 1 100 ℃- 0.01 s^-1, 900 ℃-10 s^-1, and 1 100 ℃-10 s^-1, respectively, which agreed well with the results of EBSD. The DRX volume fraction is sensitive to deformation temperature and strain rates. High strain rates and low temperature show low dynamic recrystallization volume fraction and poor microstructure homogeneity, while the dynamic recrystallization volume fraction is high and microstructure homogeneity is good at low strain rates and high temperature. The established dynamic recrystallization model has a high accuracy by comparison of experiment and finite element simulation.

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GH6159 superalloy / hot deformation / microstructure evolution / dynamic recrystallization / finite element simulation

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ZENG Xiang, LIAO Runze, XU Xuefeng, TU Qiqi, CHEN Xiaoxiao, LUO Jie, FAN Xu, HUANG Leheng, LIU Jie. Hot Deformation Behavior and Dynamic Recrystallization Modeling and Simulation of GH6159 Superalloy[J]. Journal of Netshape Forming Engineering. 2025, 17(7): 193-205 https://doi.org/10.3969/j.issn.1674-6457.2025.07.021

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Funding

; Fund：Double Thousand Plan of Jiang Xi Province (001027232090); National Natural Science Foundation of China (52305372, 52365050); Jiangxi Provincial Natural Science Foundation (20242BAB20201); PhD Starting Foundation of Nanchang Hangkong University (2030009401093)