铸造技术2026，Vol.47Issue(8)：855-869,15.DOI:10.16410/j.issn1000-8365.2026.5271
镍基多晶高温合金疲劳研究进展
Progress in Research on the Fatigue of Nickel-based Polycrystalline Superalloys
摘要
Abstract
Nickel-based polycrystalline superalloys are critical materials for hot-section components in aeroengines and gas turbines,whose high-temperature fatigue behavior directly affects the service safety and lifespan of these components.This article systematically reviews the current research status and advances in fatigue mechanical response,microstructural evolution,damage mechanisms and failure analysis,lifetime prediction,and numerical simulation of nickel-based polycrystalline superalloys.Studies have shown that the macroscopic mechanical response of these alloys at high temperatures exhibits strong path dependence,nonproportional effects,and phase-angle sensitivity,which originate from the deep coupling between thermomechanical loading and the microstructure.At the microscale,the fatigue process involves the dynamic evolution of γ'/γ" strengthening phases and competition among dislocation mechanisms,directly leading to irreversible performance degradation,such as cyclic hardening/softening.With respect to damage and failure,load phasing,by modulating the stress-temperature field,dominates the competition between intergranular and transgranular fracture modes and may induce lifetime crossover phenomena.In terms of mechanism tracing,internal defects are the dominant factors in crack initiation,whereas oxidation and environmental effects significantly accelerate crack propagation.In predictive modelling,the research paradigm is evolving from macroscopic phenomenological models to multiscale integrated models that incorporate physical mechanisms and data-driven intelligent approaches.Macroscopic models provide an engineering-usable framework for lifetime prediction,whereas advanced methods based on crystal plasticity theory,machine learning,and fatigue-creep dual-parameter indicators improve the accuracy of damage evolution quantification and full-life prediction.Finally,a future trend toward precise lifetime prediction driven by both mechanisms and data,achieved through the deep integration of multiscale physical insights and artificial intelligence technologies,is proposed.关键词
多晶高温合金/高温疲劳/微观组织/损伤失效Key words
polycrystalline superalloy/high-temperature fatigue/microstructure/damage and failure分类
矿业与冶金引用本文复制引用
沈文涛,张昭,刘强,巫荣海,罗恒军,郭良刚,李恒..镍基多晶高温合金疲劳研究进展[J].铸造技术,2026,47(8):855-869,15.基金项目
德阳市科技计划项目(旌湖实验室重点研发专项,2023GTFD001) （旌湖实验室重点研发专项,2023GTFD001）
广东省基础与应用基础研究基金自然科学基金面上项目(2024A1515010578) （2024A1515010578）
凝固技术全国重点实验室开放课题(2025-TS-11) （2025-TS-11）
