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논문 기본 정보

자료유형
학술저널
저자정보
Z. P. Zhang (Shenyang University of Technology) J. D. Liu (Chinese Academy of Sciences) K. Q. Qiu (Shenyang University of Technology) Y. Y. Huang (Chinese Academy of Sciences) J. G. Li (Chinese Academy of Sciences) X. G. Wang (Chinese Academy of Sciences) J. L. Liu (Chinese Academy of Sciences) M. Wang (Chinese Academy of Sciences) M. K. Zou (Chinese Academy of Sciences) Y. Z. Zhou (Chinese Academy of Sciences)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.2
발행연도
2023.2
수록면
444 - 456 (13page)
DOI
10.1007/s12540-022-01223-7

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A novel fourth-generation nickel-based single crystal superalloy was bonded by vacuum brazing at 1230 °C, 1260 °C and1290 °C for 60 min using a new type of Co-based filler alloy. The effects of the brazing temperature on the microstructureand mechanical properties of the brazed joint were investigated. The brazed joint was mainly composed of the non-isothermalsolidification zone (M3B2 type-boride, CrB boride, Ni3Bboride and MC carbide), isothermal solidification zone (γ and γ'Phase) and base metal. With the increase of brazing temperature, the volume fraction of borides and γ' phase in the centerof the joint decreased and increased, respectively. The high-temperature tensile test results show that the tensile strength ofthe joints was improved with increasing brazing temperature, and the maximum tensile strength of the joint was 766 MPaafter brazing at 1290 °C for 60 min. Fracture observation shows that the fracture modes of the joints were the same, whichbelongs to the typical quasi cleavage fracture. The element distribution in the joint was homogenized to a certain extent at1290 °C. The segregation of Si and Ru was found, but they were still dissolved in the γ solid solution. The experimentalresults help to better understand the microstructure characteristics of the novel fourth-generation nickel-based single crystalsuperalloy and provide guidance for further optimizing the process parameters of the brazed joint.

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