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A crystal plasticity-based approach for creep-fatigue life prediction and damage evaluation in a nickel-based superalloy

机译：基于镍高超合金中蠕变 - 疲劳寿命预测和损伤评价的基于晶体塑性的方法

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摘要

A numerical process based on crystal plasticity finite element (CPFE) was implemented to predict creep-fatigue crack initiation life. CPFE-based model can describe the macroscopic cyclic deformation and reveal grain-level damage mechanism. A new life prediction approach was then constructed by introducing fatigue and creep indicator parameters. Furthermore, a series of strain-controlled creep-fatigue tests in GH4169 superalloy at 650°C were used to validate predicted accuracy of this model, where most of the data points lied within ±1.5 error band. Finally, a potential methodology for conservative creep-fatigue life evaluation was provided by flexible creep-fatigue damage summation rule in engineering applications.
机译：实施了基于晶体塑性有限元（CPFE）的数值处理，以预测蠕变 - 疲劳裂纹启动寿命。基于CPFE的模型可以描述宏观循环变形并显示晶粒水平损伤机制。然后通过引入疲劳和蠕变指示器参数来构建新的寿命预测方法。此外，在650℃下，在GH4169超合金中进行了一系列应变控制的蠕变试验，用于验证该模型的预测精度，其中大多数数据点呈现在±1.5频带内。最后，通过柔性蠕变 - 疲劳损伤概率规则提供了保守蠕变疲劳寿命评估的潜在方法。

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  • 来源
    《International Journal of Fatigue》 |2021年第2期|106031.1-106031.12|共12页
  • 作者

    Kai-Shang Li; Run-Zi Wang; Guang-Jian Yuan; Shun-Peng Zhu; Xian-Cheng Zhang; Shan-Tung Tu; Hideo Miura;

  • 作者单位

    Key Laboratory of Pressure Systems and Safety Ministry of Education East China University of Science and Technology Shanghai 200237 PR China;

    Key Laboratory of Pressure Systems and Safety Ministry of Education East China University of Science and Technology Shanghai 200237 PR China;

    Key Laboratory of Pressure Systems and Safety Ministry of Education East China University of Science and Technology Shanghai 200237 PR China;

    School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu 612 731 PR China;

    Key Laboratory of Pressure Systems and Safety Ministry of Education East China University of Science and Technology Shanghai 200237 PR China;

    Key Laboratory of Pressure Systems and Safety Ministry of Education East China University of Science and Technology Shanghai 200237 PR China;

    Fracture and Reliability Research Institute Graduate School of Engineering Tohoku University Sendai Miyagi 9808579 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Creep-fatigue; Crystal plasticity; Life prediction; Damage diagram;

    机译：蠕变 - 疲劳;水晶塑性;生活预测;损伤图;

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