Diffraction strain measurements in a partially crystallized bulk metallic glass composite containing ductile particles

Dorian K. Balch, Ersan Üstündag, David C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

19 Scopus citations

Abstract

In situ diffraction experiments were performed with high-energy synchrotron X-rays to examine load partitioning and high-stress relaxation during uniaxial compression of a bulk metallic glass composite containing both ductile tantalum particles and crystallized matrix material. The tantalum particles yielded at an applied stress of -800 MPa, while the matrix precipitates remained elastic up to the maximum applied stress of -1250 MPa. The von Mises effective stress in the tantalum particles at yielding was 1500 MPa, well in excess of typical tantalum yield stresses, which is attributed to a combination of solid-solution strengthening and the inhibition of dislocation motion in the 1-2 μm particles. A series of constant crosshead-position measurements made at -1250 MPa suggested the possibility of room-temperature matrix relaxation under high applied loads.

Original languageEnglish (US)
Pages (from-to)176-180
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume317
Issue number1-2
DOIs
StatePublished - Mar 1 2003
EventAdvances in Metallic Glasses - Seattle, WA, United States
Duration: Feb 17 2002Feb 21 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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