Fracture toughness study of new Zr-based Be-bearing bulk metallic glasses

C. Paul Kim, Jin Yoo Suh, Aaron Wiest, Mary Laura Lind, R. Dale Conner, William L. Johnson

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Three new compositional variants of the Zr-Ti-Be-LTM (late transition metal) family of metallic glasses are discussed. Thermal stability, ΔT = Tx-Tg, was increased from 82 °C for Zr41.2Ti13.8Cu12.5Ni10Be 22.5 (Viterloy 1) to 141 °C for Zr44Ti11Cu20Be25. It is found that fracture toughness is the most distinguishing parameter characterizing the alloys in contrast to other mechanical properties. Quaternary alloys consistently had fracture toughness values exceeding 80 MPa m1/2, while for Vitreloy 1 KQ = 48.5 MPa m1/2 with a large amount of scatter. Adding iron reduced the fracture toughness to 25 MPa m1/2.

Original languageEnglish (US)
Pages (from-to)80-83
Number of pages4
JournalScripta Materialia
Volume60
Issue number2
DOIs
StatePublished - Jan 1 2009
Externally publishedYes

Keywords

  • Bulk amorphous materials
  • Fracture
  • Metallic glasses
  • Toughness

ASJC Scopus subject areas

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

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