The Intrinsic Relationship Between Microstructure Evolution and Thermal Fatigue Behavior of a Single-Crystal Cobalt-Base Superalloy

IMR OpenIR

	The Intrinsic Relationship Between Microstructure Evolution and Thermal Fatigue Behavior of a Single-Crystal Cobalt-Base Superalloy
	Gui, Wei-Min; Zhang, Hong-Yu; Yang, Min; Jin, Tao; Sun, Xiao-Feng; Zheng, Qi; Zheng, Q (reprint author), Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China.
	2017-12-01
发表期刊	CHINESE ACAD SCIENCES, INST METAL RESEARCH
ISSN	1006-7191
卷号	30 期号:12 页码:1192-1200
摘要	The intrinsic relationship between the microstructure evolution and thermal fatigue behavior of a single-crystal cobalt-base superalloy has been investigated. The thermal fatigue tests are performed cyclically between room temperature and 1050 degrees C using V-notch plate specimens. Three states of thermal fatigue specimens are selected: the as-cast, solutionized as well as aged states. The solution treatment is carried out at 1260 degrees C for 24 h, which results in the dissolution of most of interdendritic continuous primary carbides. The subsequent aging treatment is carried out at 1100 degrees C for 100 h after solution treatment, resulting in the precipitation of a profusion of chain- and point-like M23C6 carbides in the matrix. The results indicate that the heat treatment can improve the thermal fatigue properties of the alloy and the effect of the solution treatment is more prominent than that of the aging treatment. The coarse and continuously distributed primary carbides in the as-cast state are changed into small and discontinuous distribution by heat treatment, which is the dominant factor in the improvement of thermal fatigue property. Additionally, the effect of oxidation behavior during thermal fatigue test on the thermal fatigue behavior is also studied.; The intrinsic relationship between the microstructure evolution and thermal fatigue behavior of a single-crystal cobalt-base superalloy has been investigated. The thermal fatigue tests are performed cyclically between room temperature and 1050 degrees C using V-notch plate specimens. Three states of thermal fatigue specimens are selected: the as-cast, solutionized as well as aged states. The solution treatment is carried out at 1260 degrees C for 24 h, which results in the dissolution of most of interdendritic continuous primary carbides. The subsequent aging treatment is carried out at 1100 degrees C for 100 h after solution treatment, resulting in the precipitation of a profusion of chain- and point-like M23C6 carbides in the matrix. The results indicate that the heat treatment can improve the thermal fatigue properties of the alloy and the effect of the solution treatment is more prominent than that of the aging treatment. The coarse and continuously distributed primary carbides in the as-cast state are changed into small and discontinuous distribution by heat treatment, which is the dominant factor in the improvement of thermal fatigue property. Additionally, the effect of oxidation behavior during thermal fatigue test on the thermal fatigue behavior is also studied.
部门归属	[gui, wei-min ; zhang, hong-yu ; jin, tao ; sun, xiao-feng ; zheng, qi] chinese acad sci, inst met res, superalloys div, shenyang 110016, liaoning, peoples r china ; [gui, wei-min] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china ; [yang, min] northwestern polytech univ, state key lab solidificat proc, xian 710072, shaanxi, peoples r china
关键词	Cobalt-base Superalloys Heat Treatment Thermal Fatigue Carbide Oxidation
学科领域	Metallurgy & Metallurgical Engineering
资助者	National Natural Science Foundation of China [51331005, 51601192, 51671188, 11332010]; High Technology Research and Development Program of China [2014AA041701]
收录类别	SCI
语种	英语
WOS记录号	WOS:000414266400007
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78960
专题	中国科学院金属研究所
通讯作者	Zheng, Q (reprint author), Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Gui, Wei-Min,Zhang, Hong-Yu,Yang, Min,et al. The Intrinsic Relationship Between Microstructure Evolution and Thermal Fatigue Behavior of a Single-Crystal Cobalt-Base Superalloy[J]. CHINESE ACAD SCIENCES, INST METAL RESEARCH,2017,30(12):1192-1200.
APA	Gui, Wei-Min.,Zhang, Hong-Yu.,Yang, Min.,Jin, Tao.,Sun, Xiao-Feng.,...&Zheng, Q .(2017).The Intrinsic Relationship Between Microstructure Evolution and Thermal Fatigue Behavior of a Single-Crystal Cobalt-Base Superalloy.CHINESE ACAD SCIENCES, INST METAL RESEARCH,30(12),1192-1200.
MLA	Gui, Wei-Min,et al."The Intrinsic Relationship Between Microstructure Evolution and Thermal Fatigue Behavior of a Single-Crystal Cobalt-Base Superalloy".CHINESE ACAD SCIENCES, INST METAL RESEARCH 30.12(2017):1192-1200.