| 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.; Sun, Y.; Hou, X. Y.; Cui, C. Y.; Sun, X. F.; Zhou, Y. Z. | |
| 2020-07-01 | |
| Source Publication | VACUUM
 |
| Volume | 177 |
| 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. |
| DOI | 10.1016/j.vacuum.2020.109413 |
| WOS ID | WOS:000538148400058 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/155693 |
| Collection | 中国科学院金属研究所 |
| 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. |
| 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. |
| 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). |
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