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LI Xiaopeng, ZHANG Zeyu, WANG Houqin, ZHANG Binggang, YU Tao, FENG Jicai. Analysis of properties and failure mechanism of Ti600/Ni-25% Si joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(4): 84-91. DOI: 10.12073/j.hjxb.20201209002
Citation: LI Xiaopeng, ZHANG Zeyu, WANG Houqin, ZHANG Binggang, YU Tao, FENG Jicai. Analysis of properties and failure mechanism of Ti600/Ni-25% Si joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(4): 84-91. DOI: 10.12073/j.hjxb.20201209002
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Analysis of properties and failure mechanism of Ti600/Ni-25% Si joint

  • 1.

    Nanjing University of Science and Technology, Nanjing 210094, China

  • 2.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150000, China

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  • Received Date: December 08, 2020
  • Available Online: August 04, 2021
    Graphical Abstract
    • Abstract
  • Brazing of Ti600 to Ni-25%Si alloy was performed using Ti-Zr-Ni-Cu amorphous filler foil. The influence of brazing temperature on the microstructures and mechanical property of brazed joints have been studied and the strengthening mechanism of the Ti600/Ni-25%Si brazed joint was clarified. The results show that the brazing seam contains multiple reaction zones. With the increase of brazing temperature, the zone III comprised by (Ti,Zr)2Si and Ti2Ni disappears gradually while the zone IV with Ti5Si3 dispersing in Ti2Ni gradually occupies the brazing seam. As the brazing temperature increases, the shear strength of brazed joints first augmented, reached the peak value of 177 MPa at 960 ℃ and then decreased. The dispersing Ti5Si3 phase distributing in the brittle Ti2Ni phase, which hinders the crack propagation and strengthens the brittle Ti2Ni, improves the shear strength of the brazed joint obtained at elevated temperature.
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    • References (15)
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