Negative strain rate sensitivity and compositional dependence of fracture strength in Zr/Hf based bulk metallic glasses

Quasistatic and dynamic compression tests on Zr/Hf based bulk metallic glasses revealed decreasing fracture strength with increasing strain rate and decreasing Hf content. It is believed that dynamic loading promotes crack nucleation immediately following shear band initiation whereas quasistatic lo...

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Bibliographic Details
Published in:Scripta materialia 2003-12, Vol.49 (11), p.1087-1092
Main Authors: Li, Hao, Subhash, Ghatu, Gao, Xin-Lin, Kecskes, Laszlo J., Dowding, Robert J.
Format: Article
Language:English
Subjects:
Applied sciences
Compression test
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Glasses (including metallic glasses)
Hopkinson pressure bar
Materials science
Metallic glasses
Metals. Metallurgy
Physics
Scanning electron microscopy (SEM)
Shear bands
Specific materials
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Summary:Quasistatic and dynamic compression tests on Zr/Hf based bulk metallic glasses revealed decreasing fracture strength with increasing strain rate and decreasing Hf content. It is believed that dynamic loading promotes crack nucleation immediately following shear band initiation whereas quasistatic loading promotes shear bands to grow to maturity.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2003.08.012