Composition mediated serration dynamics in Zr-based bulk metallic glasses

Journal Article · Mon Nov 16 04:00:00 UTC 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4935834· OSTI ID:22486086

Wang, Z.; Wang, B. C.; Xu, B. S. ^[1]; Tian, H. ^[2]; Sun, B. A. ^[3]

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1. Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024 (China)
2. College of Computer Science and Technology, Taiyuan University of Technology, Taiyuan 030024 (China)
3. Center for Advanced Structural Materials, Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon Tong, Kowloon (Hong Kong)

The composition mediated serration dynamics in Zr-based bulk metallic glasses (BMGs) is investigated by statistics analyses of the elastic-energy density, and free volumes during shear-banding are beneficial to understand serrated-flow behavior. The amplitude and elastic-energy density display a gradually increasing and then decreasing trend with increasing the content of Zr. It is based on the free-volume theory describing the atomic-level structure of ternary Zr-Cu-Al BMGs. The good agreement between the molecular dynamics simulation and experimental results provides evidence for the variation of free volumes as the elementary mechanism of composition mediated serration dynamics.

• OSTI ID: 22486086
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 20 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
ENERGY DENSITY
METALLIC GLASSES
MOLECULAR DYNAMICS METHOD
SIMULATION
STATISTICS
VARIATIONS