Influence of cyclic loading on the onset of failure in a Zr-based bulk metallic glass

Samples of Zr 62.5 Cu 22.5 Fe 5 Al 10 bulk metallic glass are subjected to uniaxial compression. Comparison of tests in monotonic loading and cyclic loading (repeated loading to the onset of plasticity, then unloading) shows that the compressive plasticity of the glass is drastically reduced under c...

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Bibliographic Details
Published in:Journal of materials science 2014-10, Vol.49 (19), p.6716-6721
Main Authors: Louzguine-Luzgin, D. V., Louzguina-Luzgina, L. V., Ketov, S. V., Zadorozhnyy, V. Yu, Greer, A. L.
Format: Article
Language:English
Subjects:
Amorphous materials
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Comparative analysis
Compression tests
Crystallography and Scattering Methods
Cyclic loads
Edge dislocations
Fatigue (materials)
Fatigue failure
Low cycle fatigue
Materials Science
Metallic glasses
Plastic properties
Plasticity
Polymer Sciences
Repeated loading
Shear bands
Solid Mechanics
Stress concentration
Zirconium base alloys
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Summary:Samples of Zr 62.5 Cu 22.5 Fe 5 Al 10 bulk metallic glass are subjected to uniaxial compression. Comparison of tests in monotonic loading and cyclic loading (repeated loading to the onset of plasticity, then unloading) shows that the compressive plasticity of the glass is drastically reduced under cyclic loading. It is argued that this effect arises from stress reversal accelerating the concentration of shear on a dominant shear band. The link with compression–compression fatigue results, and the consequences for low-cycle fatigue of metallic glasses are considered.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-014-8276-2