Microstructural characterization of the M23C6 carbide in a long-term aged Ni-based superalloy

doi:10.1080/09500839.2016.1273554

IMR OpenIR

	Microstructural characterization of the M23C6 carbide in a long-term aged Ni-based superalloy
	Hu, X. B.1,3; Qin, X. Z.2; Hou, J. S.2; Zhou, L. Z.2; Ma, X. L.1
通讯作者	Ma, X. L.(xlma@imr.ac.cn)
	2017
发表期刊	PHILOSOPHICAL MAGAZINE LETTERS
ISSN	0950-0839
卷号	97 期号:2 页码:43-49
摘要	The microstructural features of M23C6 carbide in a long-term aged heat- and corrosion-resistant Ni-based superalloy have been investigated in detail using various kinds of transmission electron microscope (TEM) techniques. It is found that TEM contrast, which is related to structural and chemical inhomogeneities inside the grains, always exists in the interior of grains in the alloy. The structure of these inhomogeneous regions has been determined to be the same as that of the and t-M23C6 phases, where t-M23C6 indicates a transitional and metastable phase. Although possessing the same structure as the M23C6 phase, the chemical composition of the t-M23C6 is different from that of the M23C6 phase. Compared with M23C6, t-M23C6 is richer in Ni, Co, Al and Ti but poorer in W, Mo and Cr. This phenomenon of structural and chemical inhomogeneity demonstrates that pristine M23C6 carbide (p-M23C6) precipitated in standard heat-treated samples is unstable. Therefore, upon long-term ageing treatment, Ni, Co, Al and Ti may locally enrich inside the p-M23C6 phase, finally forming the phase, which can be described by the decomposition reaction p-M23C6M23C6+.
关键词	Nickel-based superalloys long-term ageing transmission electron microscopy M23C6-type carbide structural instability
资助者	National Natural Science Foundation of China
DOI	10.1080/09500839.2016.1273554
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[11327901]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000395061900001
出版者	TAYLOR & FRANCIS LTD
引用统计	被引频次：11[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/321006/123897
专题	中国科学院金属研究所
通讯作者	Ma, X. L.
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang, Peoples R China 3.Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi, Japan
推荐引用方式 GB/T 7714	Hu, X. B.,Qin, X. Z.,Hou, J. S.,et al. Microstructural characterization of the M23C6 carbide in a long-term aged Ni-based superalloy[J]. PHILOSOPHICAL MAGAZINE LETTERS,2017,97(2):43-49.
APA	Hu, X. B.,Qin, X. Z.,Hou, J. S.,Zhou, L. Z.,&Ma, X. L..(2017).Microstructural characterization of the M23C6 carbide in a long-term aged Ni-based superalloy.PHILOSOPHICAL MAGAZINE LETTERS,97(2),43-49.
MLA	Hu, X. B.,et al."Microstructural characterization of the M23C6 carbide in a long-term aged Ni-based superalloy".PHILOSOPHICAL MAGAZINE LETTERS 97.2(2017):43-49.