Evolution and Structure Characterization of the Carbide and Boride during Creep in A Ni-based Superalloy

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	Evolution and Structure Characterization of the Carbide and Boride during Creep in A Ni-based Superalloy
	Du Beining 1,2,3; Sheng Liyuan 2,3; Lai Chen 2,3; Cui Chuanyong 4; Yang Jinxia 4; Sun Xiaofeng 4
刊名	RARE METAL MATERIALS AND ENGINEERING
	2017-08-01
卷号	46 期号:8 页码:2123-2129
关键词	Ni-based superalloy creep carbide boride
ISSN号	1002-185X
通讯作者	Sheng Liyuan(lysheng@yeah.net)
英文摘要	The creep property of a Ni-based K417G superalloy was tested at 760 degrees C/645 MPa, 900 degrees C/315 MPa and 950 degrees C/235 MPa, and then the microstructure after creep was characterized through scanning electron microscope (SEM) and transmission electron microscope (TEM). The creep mechanism under different conditions was analyzed. Moreover, by comparing the morphology, distribution and crystal structure of carbides and borides before and after creep tests, the influences of creep condition on the precipitation and evolution of carbides and borides were investigated, and the effects of carbides and borides on the creep properties of Ni-based superalloy were revealed. Results show that as the creep condition varies from 760 degrees C/645 MPa to 900 degrees C/315 MPa and 950 degrees C/235 MPa, the creep life of K417G superalloy increases firstly and then decreases. At 760 degrees C/645 MPa, the creep crack initiates at the broken MC carbide; At 900 degrees C/315 MPa, the creep crack initiates at both the broken MC carbide and grain boundary; At 950 degrees C/235 MPa, the creep crack initiates at grain boundary. In addition, at 760 degrees C/645 MPa, the MC carbide does not decompose, and there is no carbide or boride precipitate at the grain boundary; At 900 degrees C/315 MPa, the MC carbide decomposes and M23C6 carbide forms. M23C6 carbide and M3B2 boride precipitate uniformly at the grain boundary; At 950 degrees C/235 MPa, the M23C6 carbide and M3B2 boride at the grain boundary grow up and distribute as strip.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000409396900016
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/124905]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sheng Liyuan
作者单位	1.Peking Univ, Beijing 100871, Peoples R China 2.PKU HKUST Shenzhen Hong Kong Inst, Shenzhen 518057, Peoples R China 3.Peking Univ, Shenzhen Inst, Shenzhen 518057, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Du Beining,Sheng Liyuan,Lai Chen,et al. Evolution and Structure Characterization of the Carbide and Boride during Creep in A Ni-based Superalloy[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46(8):2123-2129.
APA	Du Beining,Sheng Liyuan,Lai Chen,Cui Chuanyong,Yang Jinxia,&Sun Xiaofeng.(2017).Evolution and Structure Characterization of the Carbide and Boride during Creep in A Ni-based Superalloy.RARE METAL MATERIALS AND ENGINEERING,46(8),2123-2129.
MLA	Du Beining,et al."Evolution and Structure Characterization of the Carbide and Boride during Creep in A Ni-based Superalloy".RARE METAL MATERIALS AND ENGINEERING 46.8(2017):2123-2129.