Fe-B-Si-Nb bulk metallic glasses with high strength above 4000 MPa and distinct plastic elongation

Kenji Amiya, Akiri Urata, Nobuyuki Nishiyama, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)


The glass-forming ability and mechanical properties of Fe 72B20Si4Nb4 glassy alloys have been investigated. The Fe72B20Si4Nb4 glassy alloy was prepared in a cylindrical form with a diameter of 2 mm. Young's modulus, compressive fracture strength and plastic elongation of the bulk metallic glass were 200 GPa, 4200 MPa and 1.9%, respectively. Many shear bands were observed along the shear plane, which was declined by about 43 degrees to the direction of applied load, and the fracture occurred along the shear plane. The local-ordered regions were recognized in the high-resolution TEM image of the Fe72B20Si4Nb4 bulk metallic glass with a diameter of 2mm. The good mechanical properties are attributed to the suppression effect of the local-ordered regions on the propagation of shear bands.

Original languageEnglish
Pages (from-to)1214-1218
Number of pages5
JournalMaterials Transactions
Issue number4
Publication statusPublished - 2004 Apr


  • Bulk glassy alloy
  • High glass-forming ability
  • High-resolution image
  • Iron base alloy
  • Local-order region

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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