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 language | English (US) |
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Pages (from-to) | 176-180 |
Number of pages | 5 |
Journal | Journal of Non-Crystalline Solids |
Volume | 317 |
Issue number | 1-2 |
DOIs | |
State | Published - Mar 1 2003 |
Event | Advances in Metallic Glasses - Seattle, WA, United States Duration: Feb 17 2002 → Feb 21 2002 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry