Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy

doi:10.1016/j.msea.2022.143298

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy
	Huang, Yeshun 3,4; Zhang, Rui 4; Zhou, Zijian 4; Yan, Jingbo 2; Yuan, Yong 2; Gu, Yuefeng 1,2; Cui, Chuanyong 4; Zhou, Yizhou 4; Sun, Xiaofeng 4
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2022-07-07
卷号	847 页码:11
关键词	Fe-Ni-based alloy Long-term aging ? ? precipitate MC decomposition Tensile deformation
ISSN号	0921-5093
DOI	10.1016/j.msea.2022.143298
通讯作者	Cui, Chuanyong(chycui@imr.ac.cn)
英文摘要	The microstructural evolution, tensile behavior and deformation mechanism of a Fe-Ni-based superalloy for advanced ultra-supercritical coal-fired power plant during long-term isothermal exposure at 700-800 degrees C for 500-3000 h were investigated. The coarsening rate constant of gamma ' phase in the alloy exposured at 700 degrees C, 750 degrees C and 800 degrees C were about 47.543 nm3/h, 277.963 nm3/h and 2201.937 nm3/h, respectively. The activation energy for gamma ' growing is around 250.24 kJ/mol. The results showed Al, Ti and Ni elements primarily gathered into gamma ' precipitates, while Cr and Fe mainly partitioned into gamma matrix in Fe-Ni base alloy. After long-term aging, there was no precipitation of harmful phases such as the eta and sigma phases, but the decomposition of MC + gamma -> M23C6 + gamma ' was observed. The microcracks were prone to initiate and propagate around pores formed by MC decomposition and lamellar M23C6 carbide, which might result in the premature fracture failure of the alloy. The yield strength first remained stable with a slight increase in the gamma ' phase diameter and then decreased after further thermal exposure. The variation of tensile strength with precipitate size could be rationalized by the transformation between shearing model and Orowan looping mechanism of gamma ' precipitates with increasing the gamma ' precipitate size.
资助项目	National Key R&D Program of China[2021YFB3700600] ; National Key R&D Program of China[2017YFA0700703] ; National Key R&D Program of China[2019YFA0705300] ; Innovation Program of Institute of Metal Research, Chinese Academy of Sciences[2021-PY09] ; National Natural Science Foundation of China[92060102] ; Liaoning Province[2020-BS-007]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000809662100002
资助机构	National Key R&D Program of China ; Innovation Program of Institute of Metal Research, Chinese Academy of Sciences ; National Natural Science Foundation of China ; Liaoning Province
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174401]
专题	金属研究所_中国科学院金属研究所
通讯作者	Cui, Chuanyong
作者单位	1.Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China 2.Xian Thermal Power Res Inst Co Ltd, Xi'an 710032, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Huang, Yeshun,Zhang, Rui,Zhou, Zijian,et al. Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,847:11.
APA	Huang, Yeshun.,Zhang, Rui.,Zhou, Zijian.,Yan, Jingbo.,Yuan, Yong.,...&Sun, Xiaofeng.(2022).Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,847,11.
MLA	Huang, Yeshun,et al."Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 847(2022):11.