Study on the mechanism of γ' phase rafting in a 4th generation nickel-based single crystal superalloy during thermal exposure at high temperatures

doi:10.1016/j.jallcom.2024.173594

IMR OpenIR

	Study on the mechanism of γ' phase rafting in a 4th generation nickel-based single crystal superalloy during thermal exposure at high temperatures
	Liu, Pengcheng 1,2; Zhang, Zhen 3; Liu, Xingang 1; Gao, Yuting 1,2; Hao, Linghui 1,2; Li, Hui 1; Lou, Langhong 1
通讯作者	Liu, Xingang(liuxingang@imr.ac.cn)
	2024-04-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	980 页码:8
摘要	Non-directional rafting of gamma' phases in high generation nickel-based single crystal superalloys happens when the alloys are thermally exposed at high temperatures, but so far the reason remains unclear. The microstructures and internal stress fields of a 4th generation single crystal superalloy during thermal exposure at 1100( degrees)C and 950(degrees)C are investigated using transmission electron microscopy and finite element analysis. It is found that the non-directional rafting of gamma' phases occurs after 1100 C-degrees/200 h and 950 C-degrees/500 h thermal exposures. The gamma' phases are mainly rodlike shape in the space after thermal exposures and a small quantity of gamma' rafts exist as well. The elastic strain energy gradient in gamma matrix caused by the inhomogeneity of matrix channel width in the alloy is most likely the driving force for the non-directional rafting. Additionally, dislocations are observed only after the thermal exposure process at 1100 C-degrees. The effect of dislocations on non-directional rafting during thermal exposure is discussed in detail in the paper.
关键词	gamma' phase rafting Thermal exposure Finite element analysis Dislocation Nickel-based single crystal Superalloy
资助者	Science Center for Gas Turbine Project ; National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology Harbin ; National Key Research and Development Program of China ; Advanced Material Systems and Database for Gas Turbine ; Liaoning Province Science and Technology Plan
DOI	10.1016/j.jallcom.2024.173594
收录类别	SCI
语种	英语
资助项目	Science Center for Gas Turbine Project[P2021 -AB -IV -001-002] ; National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology Harbin[JCKYS2022603C008] ; National Key Research and Development Program of China[2021YFB3702900] ; Advanced Material Systems and Database for Gas Turbine[J2019 -VI -0009-0123] ; Liaoning Province Science and Technology Plan[2022JH2/101300226]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001173875500001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/184722
专题	中国科学院金属研究所
通讯作者	Liu, Xingang
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Inst Adv Technol, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Liu, Pengcheng,Zhang, Zhen,Liu, Xingang,et al. Study on the mechanism of γ' phase rafting in a 4th generation nickel-based single crystal superalloy during thermal exposure at high temperatures[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,980:8.
APA	Liu, Pengcheng.,Zhang, Zhen.,Liu, Xingang.,Gao, Yuting.,Hao, Linghui.,...&Lou, Langhong.(2024).Study on the mechanism of γ' phase rafting in a 4th generation nickel-based single crystal superalloy during thermal exposure at high temperatures.JOURNAL OF ALLOYS AND COMPOUNDS,980,8.
MLA	Liu, Pengcheng,et al."Study on the mechanism of γ' phase rafting in a 4th generation nickel-based single crystal superalloy during thermal exposure at high temperatures".JOURNAL OF ALLOYS AND COMPOUNDS 980(2024):8.