Basal Stacking Faults of μ Phase in Ni-Based Superalloy GH4151

doi:10.11900/0412.1961.2023.00026

IMR OpenIR

	Basal Stacking Faults of μ Phase in Ni-Based Superalloy GH4151
	Long Jiangdong 1,2; Duan Huichao 1; Zhao Peng 1,2; Zhang Rui 3; Zheng Tao 1,2; Qu Jinglong 4,5; Cui Chuanyong 3; Du Kui 1
通讯作者	Duan Huichao(hcduan15s@imr.ac.cn)
	2024-02-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:2 页码:167-178
摘要	Wrought Ni-based superalloys are widely used in aviation and energy fields because of their excellent creep resistance, thermal stability, heat corrosion resistance, and oxidation resistance at high temperatures. The mechanical properties of wrought Ni-based superalloys are significantly affected by grain boundary precipitation. Among the grain boundary second phases, the topologically closepacked (TCP) phase is usually discovered in wrought superalloys with the addition of refractory metal elements. As a complex intermetallic compound with only tetrahedral interstices, the TCP phase is stacked with a high packing density of atoms, embodying low plasticity and high brittleness. Given these characteristics, the TCP phase tends to promote crack initiation and propagation during creep, thereby reducing the alloy.. s creep strength. Additionally, the formation of the TCP phase requires several refractory elements, thereby weakening the effect of the solid solution strengthening of the matrix. As a ubiquitous TCP phase in wrought superalloys, mu phases are represented by rectangular and parallelogram structural subunits, which are parallel to the basal plane of mu phases. Basal stacking faults (SFs) are the most common defects in the mu phase, and SFs with different stacking sequences will form different phases with corresponding structures and mechanical properties. The mu phases and their basal SFs in wrought Ni-based superalloy GH4151 were systematically studied by multifarious electron microscopy techniques, such as EDS and atomic-resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) of aberration-corrected TEM, revealing the structure and composition of the mu phase and the structure and distribution of numerous basal SFs in the mu phase. Based on the different arrangements of structural subunits, the basal SFs were divided into four types. Type I basal SF is equivalent to the mu phase with a layer of parallelogram structural subunit reversing to form two layers of microsymmetric structures, the reversed parallelogram structural subunit is symmetrical to the rectangular one; type II basal SF is equivalent to type I basal SF in the absence of a layer of the rectangular structural subunit, forming a C14 structure and microsymmetric structure; type III basal SF results from the absence of a layer of the parallelogram structural subunit in the mu phase, forming a complete Zr4Al3 phase; and type IV basal SF results from the absence of a layer of the rectangular structural subunit in the mu phase, forming a C15 structure. Among the four types of basal SFs, type II and type IV basal SFs form Laves phases, but the occurrence of the former is more than that of the latter. This finding is related to the stability of type II basal SF (C14 structure) over type IV basal SF (C15 structure) revealed by the firstprinciple calculations.
关键词	wrought Ni-based superalloy mu phase aberration-corrected TEM basal stacking fault C14 structure
资助者	National Natural Science Foundation of China ; National Science and Technology Major Project of China
DOI	10.11900/0412.1961.2023.00026
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52171020] ; National Natural Science Foundation of China[91960202] ; National Science and Technology Major Project of China[2019VI00060120]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001153599200004
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/184032
专题	中国科学院金属研究所
通讯作者	Duan Huichao
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.Gaona Mat Co Ltd, Beijing 100081, Peoples R China 5.Sichuan CISRI Gaona Forging Co Ltd, Deyang 618000, Peoples R China
推荐引用方式 GB/T 7714	Long Jiangdong,Duan Huichao,Zhao Peng,et al. Basal Stacking Faults of μ Phase in Ni-Based Superalloy GH4151[J]. ACTA METALLURGICA SINICA,2024,60(2):167-178.
APA	Long Jiangdong.,Duan Huichao.,Zhao Peng.,Zhang Rui.,Zheng Tao.,...&Du Kui.(2024).Basal Stacking Faults of μ Phase in Ni-Based Superalloy GH4151.ACTA METALLURGICA SINICA,60(2),167-178.
MLA	Long Jiangdong,et al."Basal Stacking Faults of μ Phase in Ni-Based Superalloy GH4151".ACTA METALLURGICA SINICA 60.2(2024):167-178.