Formation of Mixed Grains in Nuclear Grade IN718 Superalloy and Its Effect on Mechanical Properties

doi:10.12442/j.issn.1002-185X.20230094

IMR OpenIR

	Formation of Mixed Grains in Nuclear Grade IN718 Superalloy and Its Effect on Mechanical Properties
	Li Aodi 1,2,3; Liang Tian 2,3; Zhang Xueliang 4; Zhao Xia 2,3; Wang Huisheng 4; Chen Jiacheng 4; Ma Yingche 2,3
通讯作者	Liang Tian(tliang@imr.ac.cn)
	2024-03-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	53 期号:3 页码:736-747
摘要	The effects of different hot rolling parameters and post-rolling heat treatment on the structures and tensile properties of nuclear grade 718 alloys were investigated by designing different initial rolling temperatures and deformation amounts. The results show that when the initial rolling temperature is below 1150 degrees C and the heat deformation amount is lower than 90%, a large number of elongated grains appear in the structure and the elongation of the alloy is reduced; when the initial rolling temperature is 1150 degrees C or the heat deformation amount reaches 90%, a unifo Abstrquiaxed grain structure can be obtained. After the solid solution treatment at 990 degrees C of the rolled plate, delta phases are precipitated and pinned to grain boundaries, and a mixed grain microstructure forms. The average values of yield strength and tensile strength at 315 degrees C after standard aging treatment can reach 1050 MPa and 1238 MPa, respectively, and elongation is up to 26%; Upon solid solution treatment at 1020 degrees C, the grown equiaxed grains are obtained, whereas the average yield strength and tensile strength at 315 degrees C can reach 985 MPa and 1175 MPa after standard aging treatment, respectively, and the elongation is up to 29%, and the alloy exhibits good strength and toughness.
关键词	nuclear grade 718 alloy elongated grain mixed grains tensile properties
DOI	10.12442/j.issn.1002-185X.20230094
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001252657300015
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188037
专题	中国科学院金属研究所
通讯作者	Liang Tian
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 3.IMR NMSA, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 4.CGN Uranium Dev Co Ltd, CGN Adv Fuel Dev Ctr, Yangjiang 529500, Peoples R China
推荐引用方式 GB/T 7714	Li Aodi,Liang Tian,Zhang Xueliang,et al. Formation of Mixed Grains in Nuclear Grade IN718 Superalloy and Its Effect on Mechanical Properties[J]. RARE METAL MATERIALS AND ENGINEERING,2024,53(3):736-747.
APA	Li Aodi.,Liang Tian.,Zhang Xueliang.,Zhao Xia.,Wang Huisheng.,...&Ma Yingche.(2024).Formation of Mixed Grains in Nuclear Grade IN718 Superalloy and Its Effect on Mechanical Properties.RARE METAL MATERIALS AND ENGINEERING,53(3),736-747.
MLA	Li Aodi,et al."Formation of Mixed Grains in Nuclear Grade IN718 Superalloy and Its Effect on Mechanical Properties".RARE METAL MATERIALS AND ENGINEERING 53.3(2024):736-747.