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With the continuous increase in turbine inlet temperature of ground-based gas turbines, research into the creep behavior of high-temperature alloys and their thermal barrier coating systems in extreme service environments has become key to ensuring long component life and reliability. This study systematically analyzes the creep deformation of directionally solidified nickel-based superalloy DZ411 and its APS thermal barrier coating and compares it with experimental data. This study primarily establishes a solid cylinder model of the coating-substrate system, employing different creep models for different layers, achieving detailed characterization of the entire creep stage of the substrate and the primary and secondary creep stages of the APS thermal barrier coating, and combines it with finite element method for numerical simulation calculations to verify the applicability of the model under complex thermo-mechanical coupling and the creep deformation behavior.

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Creep Analysis of DZ411 Directionally Solidified Superalloys with APS Thermal Barrier Coating

  • 会议论文

  • 发表日期：

    2025年

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  • KarKash Alynur,
  • Zhikun Li,
  • Chenhong Du,
  • Shun Yang

摘要

With the continuous increase in turbine inlet temperature of ground-based gas turbines, research into the creep behavior of high-temperature alloys and their thermal barrier coating systems in extreme service environments has become key to ensuring long component life and reliability. This study systematically analyzes the creep deformation of directionally solidified nickel-based superalloy DZ411 and its APS thermal barrier coating and compares it with experimental data. This study primarily establishes a solid cylinder model of the coating-substrate system, employing different creep models for different layers, achieving detailed characterization of the entire creep stage of the substrate and the primary and secondary creep stages of the APS thermal barrier coating, and combines it with finite element method for numerical simulation calculations to verify the applicability of the model under complex thermo-mechanical coupling and the creep deformation behavior.