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

IMR OpenIR

	Fatigue behavior of uncoated and MCrAlY-coated DS nickel-based superalloys pre-exposed in hot corrosion condition
其他题名	Fatigue behavior of uncoated and MCrAlY-coated DS nickelbased superalloys pre-exposed in hot corrosion condition
	Qi HongYu 1; Yang JiShen 1; Yang XiaoGuang 1; Li ShaoLin 1; Ma LiQiang 4
	2018
发表期刊	RARE METALS
ISSN	1001-0521
卷号	37 期号:11 页码:936-941
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.
其他摘要	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 ℃. 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.
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
收录类别	CSCD
语种	英语
资助项目	[National Basic Research Program of China] ; [National Natural Science Foundation of China]
CSCD记录号	CSCD:6391138
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/142092
专题	中国科学院金属研究所
作者单位	1.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
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.