Microstructural Characteristics and Mechanical Properties of an Electron Beam-Welded Ti/Cu/Ni Joint

  • Feng Zhang
  • Ting Wang
  • Siyuan Jiang
  • Binggang Zhang
  • Jicai Feng


Electron beam welding experiments of TA15 titanium alloy to GH600 nickel superalloy with and without a copper sheet interlayer were carried out. Surface appearance, microstructure and phase constitution of the joint were examined by optical microscopy, scanning electron microscopy and x-ray diffraction analysis. Mechanical properties of Ti/Ni and Ti/Cu/Ni joint were evaluated based on tensile strength and microhardness tests. The results showed that cracking occurred in Ti/Ni electron beam weldment for the formation of brittle Ni-Ti intermetallics, while a crack-free electron beam-welded Ti/Ni joint can be obtained by using a copper sheet as filler metal. The addition of copper into the weld affected the welding metallurgical process of the electron beam-welded Ti/Ni joint significantly and was helpful for restraining the formation of Ti-Ni intermetallics in Ti/Ni joint. The microstructure of the weld was mainly characterized by a copper-based solid solution and Ti-Cu interfacial intermetallic compounds. Ti-Ni intermetallic compounds were almost entirely suppressed. The hardness of the weld zone was significantly lower than that of Ti/Ni joint, and the tensile strength of the joint can be up to 282 MPa.


electron beam welding GH600 nickel alloy microstructure mechanical property TA15 titanium alloy 



This work was supported by National Natural Science Foundation of China (51405098) and State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology.


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Copyright information

© ASM International 2018

Authors and Affiliations

  • Feng Zhang
    • 1
  • Ting Wang
    • 1
    • 2
  • Siyuan Jiang
    • 1
  • Binggang Zhang
    • 1
  • Jicai Feng
    • 1
    • 2
  1. 1.Shandong Provincial Key Laboratory of Special Welding TechnologyHarbin Institute of Technology at WeihaiWeihaiChina
  2. 2.State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbinChina

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