| Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing | |
| Wu, Bin1,2; Liang, Jing-jing1,3; Yang, Yan-hong1,3; Li, Jin-guo1,3; Zhou, Yi-zhou1 | |
| Corresponding Author | Liang, Jing-jing(jjliang@imr.ac.cn) |
| 2021-07-01 | |
| Source Publication | CHINA FOUNDRY
 |
| ISSN | 1672-6421 |
| Volume | 18Issue:4Pages:397-408 |
| Abstract | In this study, a kind of Ni-based superalloy specially designed for additive manufacturing (AM) was investigated. Thermo-Calc simulation and differential scanning calorimetry (DSC) analysis were used to determine phases and their transformation temperature. Experimental specimens were prepared by laser metal deposition (LMD) and traditional casting method. Microstructure, phase constitution and mechanical properties of the alloy were characterized by scanning electron microscopy (SEM), transmission scanning electron microscopy (TEM), X-ray diffraction (XRD) and tensile tests. The results show that this alloy contains two basic phases, gamma/gamma', in addition to these phases, at least two secondary phases may be present, such as MC carbides and Laves phases. Furthermore, the as-deposited alloy has finer dendrite, its mean primary dendrite arm space (PDAS) is about 30-45 mu m, and the average size of gamma' particles is 100-150 nm. However, the dendrite size of the as-cast alloy is much larger and its PDAS is 300-500 mu m with secondary and even third dendrite arms. Correspondingly, the alloy displays different tensile behavior with different processing methods, and the as-deposited specimen shows better ultimate tensile stress (1,085.7 +/- 51.7 MPa), yield stress (697 +/- 19.5 MPa) and elongation (25.8%+/- 2.2%) than that of the as-cast specimen. The differences in mechanical properties of the alloy are due to the different morphology and size of dendrites, gamma', and Laves phase, and the segregation of elements, etc. Such important information would be helpful for alloy application as well as new alloy development. |
| Keyword | additive manufacturing laser metal deposition Ni-based superalloy tensile behavior TG146 1(+)5 A |
| Funding Organization | National Science and Technology Major Project ; National Natural Science Foundation of China |
| DOI | 10.1007/s41230-021-9025-1 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Science and Technology Major Project[Y2019-VII-0011-0151] ; National Natural Science Foundation of China[51771190] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000696546900014 |
| Publisher | SPRINGER SINGAPORE PTE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/166944 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liang, Jing-jing |
| Affiliation | 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 3.Space Mfg Technol CAS Key Lab, Beijing 100094, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Bin,Liang, Jing-jing,Yang, Yan-hong,et al. Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing[J]. CHINA FOUNDRY,2021,18(4):397-408. |
| APA | Wu, Bin,Liang, Jing-jing,Yang, Yan-hong,Li, Jin-guo,&Zhou, Yi-zhou.(2021).Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing.CHINA FOUNDRY,18(4),397-408. |
| MLA | Wu, Bin,et al."Phase constitution, microstructure and mechanical properties of a Ni-based superalloy specially designed for additive manufacturing".CHINA FOUNDRY 18.4(2021):397-408. |
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