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

• Published in: Journal of materials science Vol. 49; no. 19; pp. 6716 - 6721
• Main Authors: Louzguine-Luzgin, D. V., Louzguina-Luzgina, L. V., Ketov, S. V., Zadorozhnyy, V. Yu, Greer, A. L.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.10.2014; Springer; Springer Nature B.V
• 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; Flow Stress; Cyclic Loading; Stress Drop; Metallic Glass; Shear Band
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-014-8276-2

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.