Annealing embrittlement of Fe78Si9B13 (METGLAS-2605S2)

J. M. Cadogan, S. J. Campbell, J. Jing, C. P. Foley, P. Kater, Y. W. Mai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)


The ductile to brittle transition that occurs in amorphous Fe78Si9B13 (METGLAS-2605S2) has been investigated using mechanical measurements over the temperature range 250-370 °C. The fracture toughness values, K Ic, have been determined for a range of annealing times (5-30 min) and cooling rates of 15-45 °C/min. A pronounced ductile to brittle transition is observed around 310(10) °C although no obvious structural changes are evident as indicated by x-ray diffraction. Comparison of transmission and back-scattered conversion electron 57Fe Mössbauer spectra for the bulk as-received ribbon in the ductile state (KIc=52~MPa ̇ √m) and the ribbon annealed to the brittle state (KIc~10 MPa ̇ √m) indicates magnetic texture effects in both the bulk and on the surface of these amorphous ribbons, related to the magnetostriction resulting from the quenched-in stress during the ribbon production process, and the ensuing stress-relief upon annealing.

Original languageEnglish
Pages (from-to)7-14
Number of pages8
JournalHyperfine Interactions
Issue number1-3
Publication statusPublished - Apr 2014
Externally publishedYes


  • Amorphous materials
  • Embrittlement
  • Fracture toughness
  • Mössbauer spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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