Metallurgical and Materials Transactions A

, Volume 47, Issue 2, pp 769–776 | Cite as

Microstructure Formation in Dissimilar Metal Welds: Electron Beam Welding of Ti/Ni

  • Subhradeep ChatterjeeEmail author
  • T. A. Abinandanan
  • G. Madhusudhan Reddy
  • Kamanio Chattopadhyay


We present results for electron beam welding of a binary Ti/Ni dissimilar metal couple. The difference in physical properties of the base metals and metallurgical features (thermodynamics and kinetics) of the system influence both macroscopic transport and microstructure development in the weld. Microstructures near the fusion interfaces are markedly different from those inside the weld region. At the Ti side, Ti2Ni dendrites are observed to grow toward the fusion interface, while in the Ni side, layered growth of γ-Ni, Ni3Ti, and Ni3Ti + NiTi eutectic is observed. Different morphologies of the latter eutectic constitute the predominant microstructure inside the weld metal region. These results are compared and contrasted with those from laser welding of the same binary couple, and a scheme of solidification is proposed to explain the observations. This highlights notable departures from welding of similar and other dissimilar metals such as a significant asymmetry in heat transport that governs progress of solidification from each side of the couple, and a lack of unique liquidus isotherm characterizing the liquid–solid front.


Welding Weld Pool Ni3Ti Electron Beam Welding Marangoni Convection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2015

Authors and Affiliations

  • Subhradeep Chatterjee
    • 1
    Email author
  • T. A. Abinandanan
    • 2
  • G. Madhusudhan Reddy
    • 3
  • Kamanio Chattopadhyay
    • 2
  1. 1.Indian Institute of Technology HyderabadSangareddyIndia
  2. 2.Indian Institute of ScienceBangaloreIndia
  3. 3.Defence Metallurgical Research LaboratoryHyderabadIndia

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