Hot Isostatic Densification of Inconel 718 Powder Alloy and Elimination of Prior Particle Boundaries

doi:10.11900/0412.1961.2022.00481

IMR OpenIR

	Hot Isostatic Densification of Inconel 718 Powder Alloy and Elimination of Prior Particle Boundaries
	Tian, Xiaosheng 1,2; Lu, Zhengguan 1; Xu, Lei 1; Wu, Jie 1; Yang, Rui 1
通讯作者	Wu, Jie(jwu10s@imr.ac.cn)
	2024-11-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:11 页码:144
摘要	Inconel 718 alloy is widely used in aeronautical fields owing to its excellent mechanical properties and high-temperature resistance. Hot isostatic pressing (HIPing) is a powder metallurgy (PM) processing technology that produces near or net-shape components and solves the problems of macro- segregation and microstructure inhomogeneity. However, the application of PM Inconel 718 alloys has been limited by prior particle boundaries (PPBs), which can negatively impact mechanical properties, such as elongation at elevated temperatures and impact properties. To address this issue, the formation of PPBs can be suppressed during HIPing, or they can be eliminated through subsequent processing. Pre-alloyed powder of Inconel 718 was prepared using the electrode induction melting gas atomization (EIGA) method, and PM Inconel 718 alloys were prepared through the HIPing route. The resulting compacts were subjected to special high-temperature heat treatment, and their mechanical properties were tested. The mechanical properties of PM Inconel 718 test bars were found to be comparable to those of the wrought version of the alloy. However, large and complex components of PM Inconel 718 can contain undesirable PPBs due to mold shielding and insufficient degassing, resulting in poor ductility and impact properties after standard heat treatment. Special high-temperature heat treatment can effectively eliminate the PPBs in the compacts, leading to a substantial improvement in tensile ductility and impact properties. This improvement makes it possible to prepare large and complex components through HIPing with improved mechanical properties.
关键词	Inconel 718 alloy hot isostatic pressing heat treatment prior particle boundary me- chanical property
资助者	National Science and Technology Major Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS Project for Young Scientists in Basic Research
DOI	10.11900/0412.1961.2022.00481
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project of China[J2019-VII-0005-0145] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22010102] ; CAS Project for Young Scientists in Basic Research[YSBR-025]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001376975000004
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/321006/181413
专题	中国科学院金属研究所
通讯作者	Wu, Jie
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
推荐引用方式 GB/T 7714	Tian, Xiaosheng,Lu, Zhengguan,Xu, Lei,et al. Hot Isostatic Densification of Inconel 718 Powder Alloy and Elimination of Prior Particle Boundaries[J]. ACTA METALLURGICA SINICA,2024,60(11):144.
APA	Tian, Xiaosheng,Lu, Zhengguan,Xu, Lei,Wu, Jie,&Yang, Rui.(2024).Hot Isostatic Densification of Inconel 718 Powder Alloy and Elimination of Prior Particle Boundaries.ACTA METALLURGICA SINICA,60(11),144.
MLA	Tian, Xiaosheng,et al."Hot Isostatic Densification of Inconel 718 Powder Alloy and Elimination of Prior Particle Boundaries".ACTA METALLURGICA SINICA 60.11(2024):144.