Correlation between the microstructures and the deformation mechanisms of CuZr-based bulk metallic glass composites

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Date
2013
Volume
3
Issue
1
Journal Title
Title
Series Titel
Publisher
New York : American Institute of Physics
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Abstract

The variation of the transformation-mediated deformation behavior with microstructural changes in CuZr-based bulk metallic glass composites is investigated. With increasing crystalline volume fraction, the deformation mechanism gradually changes from a shear-banding dominated process as evidenced by a chaotic serrated flow behavior, to being governed by a martensitic transformation with a pronounced elastic-plastic stage, resulting in different plastic deformations evolving into a self-organized critical state characterized by the power-law distribution of shear avalanches. This is reflected in the stress-strain curves by a single-to-"double"-to-"triple"- double yielding transition and by different mechanical properties with different serrated flow characteristics, which are interpreted based on the microstructural evolutions and a fundamental energy theorem. Our results can assist in understanding deformation behaviors for high-performance metastable alloys.

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Keywords
Composite materials, Critical current density (superconductivity), Elastoplasticity, Glass, Martensitic transformations, Stress-strain curves
Citation
Song, K. K., Pauly, S., Sun, B. A., Tan, J., Stoica, M., Kühn, U., & Eckert, J. (2013). Correlation between the microstructures and the deformation mechanisms of CuZr-based bulk metallic glass composites. 3(1). https://doi.org//10.1063/1.4789516
License
CC BY 3.0 Unported