Microstructure and Mechanical Properties of Inconel 718 Powder Alloy Prepared by Hot Isostatic Pressing

doi:10.11900/0412.1961.2021.00586

IMR OpenIR

	Microstructure and Mechanical Properties of Inconel 718 Powder Alloy Prepared by Hot Isostatic Pressing
	Xu Lei 1; Tian Xiaosheng 1,2; Wu Jie 1; Lu Zhengguan 1; Yang Rui 1
通讯作者	Xu Lei(lxu@imr.ac.cn)
	2023-05-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	59 期号:5 页码:693-702
摘要	Inconel 718 alloy, with outstanding high-temperature resistance and mechanical properties, has been widely used in aviation fields. However, large and complex structural components are difficult to produce by traditional processes, which may lead to segregation, micropores, and Laves phases. Net-shape hot isostatic pressing (HIP) is a powder metallurgy processing technology that produces near-shape or net-shape components with the desired microstructures, properties, and cost effectiveness. In this study, Inconel 718 pre-alloyed powder was prepared using the electrode induction melting gas atomization technique, and then the pre-alloyed powder was characterized. Powder compacts were prepared by the HIP of the pre-alloyed powder, and their mechanical properties were tested. Although clean, high-quality powder can be obtained from Inconel 718 alloy due to its lower chemical reactivity compared to titanium alloys, carbide-forming elements diffuse to the powder surface during HIP. These form a hard film with the original oxide particles as nuclei, consisting of Ni3Nb and carbides of Ti and Nb. These films become prior particle boundaries (PPBs) in the obtained powder metallurgy Inconel 718 alloy, resulting in lower ductility, toughness, and stress rupture life than those of the wrought version of the alloy. Suppressing the formation of the PPBs during HIP or eliminating them via subsequent processing significantly improves the comprehensive mechanical properties of the material.
关键词	Inconel 718 alloy powder metallurgy hot isostatic pressing prior particle boundary
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	10.11900/0412.1961.2021.00586
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:000971778800010
出版者	SCIENCE PRESS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177439
专题	中国科学院金属研究所
通讯作者	Xu Lei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 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	Xu Lei,Tian Xiaosheng,Wu Jie,et al. Microstructure and Mechanical Properties of Inconel 718 Powder Alloy Prepared by Hot Isostatic Pressing[J]. ACTA METALLURGICA SINICA,2023,59(5):693-702.
APA	Xu Lei,Tian Xiaosheng,Wu Jie,Lu Zhengguan,&Yang Rui.(2023).Microstructure and Mechanical Properties of Inconel 718 Powder Alloy Prepared by Hot Isostatic Pressing.ACTA METALLURGICA SINICA,59(5),693-702.
MLA	Xu Lei,et al."Microstructure and Mechanical Properties of Inconel 718 Powder Alloy Prepared by Hot Isostatic Pressing".ACTA METALLURGICA SINICA 59.5(2023):693-702.