| Investigation on microstructure and mechanical properties of a vacuum brazed joint of gamma '-strengthened Co-based single crystal superalloy before and after the post-bond heat treatment | |
| Wang, S. Y.1,2; Sun, Y.1; Hou, X. Y.1; Cui, C. Y.1; Sun, X. F.1; Zhou, Y. Z.1 | |
| Corresponding Author | Sun, Y.(yuansun@imr.ac.cn) |
| 2020-07-01 | |
| Source Publication | VACUUM
 |
| ISSN | 0042-207X |
| Volume | 177Pages:11 |
| Abstract | Transient liquid phase bonding of gamma'-strengthened Co-based superalloy was carried out using Ni-based filler alloy. The effects of post-bond heat treatment (PBHT) on the microstructure and mechanical properties of the gamma'-strengthened Co-based superalloy joint were systematically investigated. Two distinct regions were observed in the isothermally solidified zone: primary gamma' phase zone (PZ) and secondary gamma' phase zone (SZ). The diffusion of Al from the substrate to the liquid interlayer proves to be the main reason for the precipitation of gamma' phases, showing a significant growth trend after the PBHT. The joint after the PBHT shows higher microhardness in most areas of the bonding zone. However, some parts of the diffusion affected zone show the contrary result. This could attribute to the competition consequence of the solid solution strengthening and second phase strengthening. Furthermore, the post-bond heat treated joint exhibited higher yield strength and longer stress rupture life. Our experimental results help to better understand the microstructural characteristic of the new type Co-based superalloy and provide a direction for further optimizing the brazing joint. |
| Keyword | Transient liquid phase bonding gamma '-strengthened Co-Based single crystal super alloy Microstructure Microhardness |
| Funding Organization | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Aerospace Power Foundation |
| DOI | 10.1016/j.vacuum.2020.109413 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51771191] ; National Key Research and Development Program of China[2017YFA0700704] ; Aerospace Power Foundation[DLJJ1825] |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Applied |
| WOS ID | WOS:000538148400058 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139065 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sun, Y. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 96 JinZhai Rd, Hefei 230026, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, S. Y.,Sun, Y.,Hou, X. Y.,et al. Investigation on microstructure and mechanical properties of a vacuum brazed joint of gamma '-strengthened Co-based single crystal superalloy before and after the post-bond heat treatment[J]. VACUUM,2020,177:11. |
| APA | Wang, S. Y.,Sun, Y.,Hou, X. Y.,Cui, C. Y.,Sun, X. F.,&Zhou, Y. Z..(2020).Investigation on microstructure and mechanical properties of a vacuum brazed joint of gamma '-strengthened Co-based single crystal superalloy before and after the post-bond heat treatment.VACUUM,177,11. |
| MLA | Wang, S. Y.,et al."Investigation on microstructure and mechanical properties of a vacuum brazed joint of gamma '-strengthened Co-based single crystal superalloy before and after the post-bond heat treatment".VACUUM 177(2020):11. |
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