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Characterization of Explosion-Bonded Ti-Alloy/Steel Plate with Ni Interlayer

Abstract

A three-layered explosion-welded (EXW) plate consisting of Ti-alloy/Ni/steel was investigated. Both the Ti/Ni and Ni/steel interfaces displayed a wavy shape typical of the EXW process, which reflects the occurrence of massive mass transfer during bonding. New phase formation was not observed at the Ni/steel interface, while, according to the SEM, XRD, and nanoindentation testing, the formation of brittle intermetallic phases took place at the Ti-alloy/Ni interface. These intermetallics serve as the weakest part of the joint and determine a brittle mode of fracture under tensile stress. The tensile strength of the joint is about 300 MPa, which is determined by intermetallic phases formed at the Ti/Ni interface.

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Acknowledgments

Special thanks to ATI-Allegheny Technologies Inc. for supplying the materials which permitted the research. The authors would also like to thank Zvia Shmul from Soreq Nuclear Center for her assistance with SAM, Hagit Didi from Ben Gurion University for her contribution to SEM operation, Dr. Sidney Cohen from the Weizmann Institute for his help with Nanoindentation, and Dr. Zehava Barkay from the Wolfson Applied Materials Research Center for her help with ESEM operation.

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Correspondence to I. Rosenthal.

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Rosenthal, I., Miriyev, A., Tuval, E. et al. Characterization of Explosion-Bonded Ti-Alloy/Steel Plate with Ni Interlayer. Metallogr. Microstruct. Anal. 3, 97–103 (2014). https://doi.org/10.1007/s13632-014-0120-1

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  • DOI: https://doi.org/10.1007/s13632-014-0120-1

Keywords

  • EXW
  • Solid state welding
  • Ti
  • Steel