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Thermomechanical fatigue damage mechanism and life assessment of a single crystal Ni-based superalloy
Yang, Junjie1; Jing, Fulei2; Yang ZM(杨正茂)3; Jiang, Kanghe4; Hu, Dianyin5; Zhang, Bin5
Corresponding AuthorJing, Fulei([email protected]) ; Yang, Zhengmao([email protected])
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
2021-08-15
Volume872Pages:12
ISSN0925-8388
AbstractThe thermomechanical fatigue (TMF) of single-crystal air-cooled turbine blades is critical for accurately evaluating the lifetimes of advanced aero-engines. The present work focuses on the mechanical behavior and damage mechanism of a single-crystal Ni-based superalloy (DD6) under stress-controlled TMF loading, and in-phase (IP) and out-of-phase (OP) mode of TMF were conducted and compared with low cycle fatigue (LCF) loading. A ratcheting effect is observed during the deformation of DD6 under TMF loading, and the direction and size of the ratcheting strain are considerably influenced by the phase angle and mechanical load. The ratcheting strain increases with mechanical load and dwell time at high temperature, consequently shortening the lifetime of the material. The key factors affecting the TMF damage of DD6 are identified through a SEM analysis, which shows that the damage under IP TMF loading mainly comes from creep and fatigue, whereas that under OP TMF loading is dominated by oxidation and fatigue. Based on the critical plane approach, a fatigue life prediction model is proposed considering the ratcheting effect to predict the fatigue life of DD6 under TMF loading. The good agreement between the proposed model and experimental data indicates that the model has the potential to predict the fatigue life of DD6 under TMF loading. (c) 2021 Elsevier B.V. All rights reserved.
KeywordThermomechanical fatigue (TMF) Single crystal superalloy Ratcheting effect Critical plane approach Life prediction
DOI10.1016/j.jallcom.2021.159578
Indexed BySCI ; EI
Language英语
WOS IDWOS:000647671300004
WOS KeywordLOW-CYCLE FATIGUE ; BEHAVIOR ; ORIENTATIONS ; DEFORMATION ; PREDICTION ; STRAIN ; MODEL
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences[XDA17030100] ; National Natural Science Foundation of China[51375031]
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
Classification一类
Ranking1
ContributorJing, Fulei ; Yang, Zhengmao
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/86585
Collection宽域飞行工程科学与应用中心
Affiliation1.Tsinghua Univ, Inst Aero Engine, Beijing, Peoples R China;
2.Aero Engine Grp Corp China, Aero Engine Acad China, Beijing, Peoples R China;
3.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China;
4.Aero Engine Grp Corp China, Hunan Aviat Powerplant Res Inst, Zhuzhou, Peoples R China;
5.Beihang Univ, Sch Energy & Power Engn, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Yang, Junjie,Jing, Fulei,Yang ZM,et al. Thermomechanical fatigue damage mechanism and life assessment of a single crystal Ni-based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,872:12.Rp_Au:Jing, Fulei, Yang, Zhengmao
APA Yang, Junjie,Jing, Fulei,杨正茂,Jiang, Kanghe,Hu, Dianyin,&Zhang, Bin.(2021).Thermomechanical fatigue damage mechanism and life assessment of a single crystal Ni-based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,872,12.
MLA Yang, Junjie,et al."Thermomechanical fatigue damage mechanism and life assessment of a single crystal Ni-based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 872(2021):12.
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