| Microstructure and Mechanical Properties of Inconel 718 Powder Alloy Prepared by Hot Isostatic Pressing | |
| Xu Lei1; Tian Xiaosheng1,2; Wu Jie1; Lu Zhengguan1; Yang Rui1 | |
| Corresponding Author | Xu Lei(lxu@imr.ac.cn) |
| 2023-05-01 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 59Issue:5Pages:693-702 |
| Abstract | 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. |
| Keyword | Inconel 718 alloy powder metallurgy hot isostatic pressing prior particle boundary |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000971778800010 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/177439 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xu Lei |
| Affiliation | 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 |
| Recommended Citation 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. |
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