Fatigue behavior of uncoated and MCrAlY-coated DS nickel-based superalloys pre-exposed in hot corrosion condition

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	Fatigue behavior of uncoated and MCrAlY-coated DS nickel-based superalloys pre-exposed in hot corrosion condition
	Qi HongYu 2; Yang JiShen 2; Yang XiaoGuang 2; Li ShaoLin 2; Ma LiQiang 4
刊名	RARE METALS
	2018
卷号	37 期号:11 页码:936-941
关键词	TEMPERATURE 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
ISSN号	1001-0521
其他题名	Fatigue behavior of uncoated and MCrAlY-coated DS nickelbased superalloys pre-exposed in hot corrosion condition
英文摘要	The 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.
资助项目	[National Basic Research Program of China] ; [National Natural Science Foundation of China]
语种	英语
CSCD记录号	CSCD:6391138
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/142088]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Beijing Key Lab Aeroengine Struct & Strength, Beijing 100191, Peoples R China 2.北京航空航天大学 3.Collaborat Innovat Ctr Adv Aeroengine, Beijing 100191, Peoples R China 4.中国科学院金属研究所
推荐引用方式 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.