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Fatigue behavior of uncoated and MCrAlY-coated DS nickel-based superalloys pre-exposed in hot corrosion condition
Alternative TitleFatigue behavior of uncoated and MCrAlY-coated DS nickelbased superalloys pre-exposed in hot corrosion condition
Qi HongYu1; Yang JiShen1; Yang XiaoGuang1; Li ShaoLin1; Ma LiQiang4
2018
Source PublicationRARE METALS
ISSN1001-0521
Volume37Issue:11Pages:936-941
AbstractThe effects of a MCrAlY coating on low-cycle fatigue (LCF) behavior of directionally solidified (DS) nickle-based superalloy DZ125 were investigated. Before the fatigue testings, the specimens were pre-exposed in high-temperature hot corrosion (HTHC) environment generating by a burner rig at 850 degrees C. The results show that the coating in hot corrosion condition has beneficial effects on the fatigue resistance of superalloy. Under corrosion condition, the MCrAlY-coated specimens tested have higher fatigue lives than the uncoated specimens at the same stress level. The coating failure results from fatigue process and numerous fatigue cracks were nucleated at the specimen surface, only one main crack propagates inward and the secondary cracks away from the fracture surface are perpendicular to the loading orientation.
Other AbstractThe effects of a MCrAlY coating on low-cycle fatigue (LCF) behavior of directionally solidified (DS) nickle-based superalloy DZ125 were investigated. Before the fatigue testings, the specimens were pre-exposed in high-temperature hot corrosion (HTHC) environment generating by a burner rig at 850 ℃. The results show that the coating in hot corrosion condition has beneficial effects on the fatigue resistance of superalloy. Under corrosion condition, the MCrAlY-coated specimens tested have higher fatigue lives than the uncoated specimens at the same stress level. The coating failure results from fatigue process and numerous fatigue cracks were nucleated at the specimen surface, only one main crack propagates inward and the secondary cracks away from the fracture surface are perpendicular to the loading orientation.
KeywordTEMPERATURE PROTECTIVE-COATINGS GAS-TURBINE BLADE THERMOMECHANICAL FATIGUE MECHANICAL-PROPERTIES DEGREES-C ALLOY OXIDATION MCrAlY coating Low-cycle fatigue Directionally solidified Ni-based superalloy Hot corrosion Prior exposure
Indexed ByCSCD
Language英语
Funding Project[National Basic Research Program of China] ; [National Natural Science Foundation of China]
CSCD IDCSCD:6391138
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/142092
Collection中国科学院金属研究所
Affiliation1.北京航空航天大学
2.Collaborat Innovat Ctr Adv Aeroengine, Beijing 100191, Peoples R China
3.Beijing Key Lab Aeroengine Struct & Strength, Beijing 100191, Peoples R China
4.中国科学院金属研究所
Recommended Citation
GB/T 7714
Qi HongYu,Yang JiShen,Yang XiaoGuang,et al. Fatigue behavior of uncoated and MCrAlY-coated DS nickel-based superalloys pre-exposed in hot corrosion condition[J]. RARE METALS,2018,37(11):936-941.
APA Qi HongYu,Yang JiShen,Yang XiaoGuang,Li ShaoLin,&Ma LiQiang.(2018).Fatigue behavior of uncoated and MCrAlY-coated DS nickel-based superalloys pre-exposed in hot corrosion condition.RARE METALS,37(11),936-941.
MLA Qi HongYu,et al."Fatigue behavior of uncoated and MCrAlY-coated DS nickel-based superalloys pre-exposed in hot corrosion condition".RARE METALS 37.11(2018):936-941.
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