In Situ Small-Angle Neutron Scattering Study of Precipitation and Evolution Behavior of Secondary Phases in Ni-Based Superalloys

doi:10.11900/0412.1961.2024.00068

IMR OpenIR

	In Situ Small-Angle Neutron Scattering Study of Precipitation and Evolution Behavior of Secondary Phases in Ni-Based Superalloys
	Li Yawei 1; Xie Guang 1; Ke Yubin 2,3; Lu Yuzhang 1; Huang Yaqi 1; Zhang Jian 1
通讯作者	Xie Guang(gxie@imr.ac.cn) ; Zhang Jian(jianzhang@imr.ac.cn)
	2024-08-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:8 页码:1100-1108
摘要	The gamma' and gamma'' phases are crucial strengthening components in Ni-based superalloys. Understanding their precipitation and evolution mechanism during heat treatment is essential for tailoring the mechanical properties of the superalloys. Herein, GH4169 superalloy was used to investigate the precipitation and evolution behaviors of secondary phases during in situ standard heat treatment by time-of-flight small-angle neutron scattering. Further, transmission electron microscopy was employed to observe the secondary phases generated in samples after ex situ heat treatment. Results showed that the secondary phases, including the spherical.' phase and coprecipitates (mainly the gamma''/gamma'/gamma'' sandwich structure), mostly occurred during the aging treatment. After the formation of coprecipitates during the first aging treatment (AT1), their quantity apparently remained stable during the second aging treatment (AT2). Furthermore, the average size of the gamma' phase and coprecipitates gradually increased during the AT1 stage while remaining almost constant during the AT2 stage. Throughout the aging process, the interface between spherical.' phase and. matrix exhibited a decreased composition fluctuation, while the interface fluctuation of coprecipitates was always significant. Thus, it can be inferred that the precipitation and evolution behaviors of secondary phases are controlled by the element diffusion at the interface.
关键词	GH4169 heat treatment small-angle neutron scattering second phase precipitation and evolution behavior
DOI	10.11900/0412.1961.2024.00068
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001281277300009
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/321006/189678
专题	中国科学院金属研究所
通讯作者	Xie Guang; Zhang Jian
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li Yawei,Xie Guang,Ke Yubin,et al. In Situ Small-Angle Neutron Scattering Study of Precipitation and Evolution Behavior of Secondary Phases in Ni-Based Superalloys[J]. ACTA METALLURGICA SINICA,2024,60(8):1100-1108.
APA	Li Yawei,Xie Guang,Ke Yubin,Lu Yuzhang,Huang Yaqi,&Zhang Jian.(2024).In Situ Small-Angle Neutron Scattering Study of Precipitation and Evolution Behavior of Secondary Phases in Ni-Based Superalloys.ACTA METALLURGICA SINICA,60(8),1100-1108.
MLA	Li Yawei,et al."In Situ Small-Angle Neutron Scattering Study of Precipitation and Evolution Behavior of Secondary Phases in Ni-Based Superalloys".ACTA METALLURGICA SINICA 60.8(2024):1100-1108.