Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment

doi:10.1016/S1003-6326(18)64817-4

CORC > 金属研究所 > 中国科学院金属研究所

	Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment
	Gao, Shuang 1,2; Hou, Jie-shan 1; Guo, Yong-an 1; Zhou, Lan-zhang 1
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2018-09-01
卷号	28 期号:9 页码:1735-1744
关键词	Ni-based superalloy phase precipitation carbide gamma' phase tensile properties
ISSN号	1003-6326
DOI	10.1016/S1003-6326(18)64817-4
通讯作者	Hou, Jie-shan(jshou@imr.ac.cn)
英文摘要	The phase precipitation behavior and tensile properties of an as-cast Ni-based alloy, IN617B alloy, after solution heat treatment and long-term aging treatment were investigated. Ti(C,N), M6C and M23C6 are the primary precipitates in as-cast microstructure. After solution heat treatment, most of carbides dissolve into the matrix except a few fine Ti(C,N) within grains. During long-term aging at 700 degrees C, the phase precipitation behaviors of the alloy are characterized as follows: (1) M23C6 carbides at grain boundaries (GBs) transform from film-like shape to cellular shape and gradually coarsen due to the decrease of the surface energy and element aggregation to GBs; (2) M23C6 carbides within grains have a bar-like morphology with a preferential growth direction [110] and have a cube-on-cube coherent orientation relationship with the matrix gamma; (3) gamma' particles inhibit the coarsening of M23C6 within grains by constraining the diffusion of formation elements. Furthermore, the tensile strength of the alloy obviously increases, but the ductility significantly decreases after the aging for 5000 h. The alloy has a relatively stable microstructure which guarantees the excellent tensile properties during long-term aging.
资助项目	National Natural Science Foundation of China[51571191] ; National Energy Administration Program of China[NY 20150102]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000446870200006
资助机构	National Natural Science Foundation of China ; National Energy Administration Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/129777]
专题	金属研究所_中国科学院金属研究所
通讯作者	Hou, Jie-shan
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gao, Shuang,Hou, Jie-shan,Guo, Yong-an,et al. Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2018,28(9):1735-1744.
APA	Gao, Shuang,Hou, Jie-shan,Guo, Yong-an,&Zhou, Lan-zhang.(2018).Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,28(9),1735-1744.
MLA	Gao, Shuang,et al."Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 28.9(2018):1735-1744.