Transactions of Materials and Heat Treatment

Title：High temperature and low cycle fatigue behavior and Chaboche constitutive analysis on superalloy GH4169

Authors： Fang Zhou Wu Yinghong Wang Weimin

Unit： School of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing 100029 China

KeyWords： superalloy GH4169 low cycle fatigue monotonic tensile cyclic load Masing characteristics

ClassificationCode：TG131

year,vol(issue):pagenumber：2025,50(6):204-213

Abstract：

For superalloy GH4169, high-temperature monotonic tensile and high-temperature low-cycle fatigue tests were conducted, and its mechanical response behavior was studied. The results show that at a low strain amplitude of 0.6%, the alloy does not show obvious softening characteristics, but instead shows a small hardening phenomenon in the later stage of the cycle. At higher strain amplitudes (0.8%, 1.0% and 1.2%), it shows a more obvious hardening characteristic. Manson-Coffin curve fitting analysis results indicates that the total strain amplitude of alloy is determined by the plastic strain, which does not conform to the bilinear characteristics of Manson-Coffin. The Romberg-Osgood model fitting results show that the hardening ability of the material under cyclic loading is significantly higher than that under monotonic tensile. The results of Masing characteristics study show that with the increasing of the strain amplitude, the Non-Masing characteristics of the alloy become more obvious. Finally, based on the test data, the Chaboche mixed hardening model parameters are fitted, and the accuracy is verified by Abaqus finite element simulation. Thus, the research results provide a reliable constitutive model parameters basis for complex working condition simulation of superalloy GH4169.

Funds：

国家自然科学基金重点项目(92160203)；国家重点研发计划项目 (2020YFB2010803)；中央高校人才基金（buctrc202026)

作者简介：方舟（1984-），女，博士，教授，硕士生导师，E-mail：zhoufang@buct.edu.cn；通信作者：王维民（1978-），男，博士，教授，博士生导师，E-mail：2006500088@buct.edu.cn

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