Thermal and microstructural effects of welding metallic glasses by self-propagating reactions in multilayer foils

A. J. Swiston, E. Besnoin, A. Duckham, Omar Knio, T. P. Weihs, T. C. Hufnagel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

We have previously demonstrated that Zr-based metallic glass components can be welded using the heat produced by self-propagating exothermic reactions in multilayer metallic foils. Here, we examine the evolution of the temperature field during reactive joining of bulk amorphous Zr57Ti 5Cu20Ni8Al10, as well as the microstructure of the resulting joints. Numerical simulations predict that the metallic glass near the glass/foil interface heats very rapidly (∼10 7 K s-1) to temperatures of ∼1350 K, well above the liquidus temperature of the amorphous alloy (∼1115 K), followed by rapid cooling (∼105 K s-1) once the reaction front has passed. The maximum temperature, heating rate, and cooling rate of the glass all decrease with increasing distance from the interface. Infrared measurements of the temperature of the metallic glass components during joining show that the cooling rate exceeds the critical cooling rate of the alloy. Optical and scanning electron microscopy reveal no evidence of crystallization of the glass components due to the joining process.

Original languageEnglish (US)
Pages (from-to)3713-3719
Number of pages7
JournalActa Materialia
Volume53
Issue number13
DOIs
StatePublished - Aug 1 2005

Keywords

  • Metallic glasses
  • Scanning electron microscopy
  • Simulation
  • Thermography
  • Welding

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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