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Title: A quantitative link between microplastic instability and macroscopic deformation behaviors in metallic glasses
Authors: Wu, Y.
Chen, G. L.
Hui, X. D.
Liu, C. T.
Lin, Y.
Shang, X. C.
Lu, Z. P.
Subjects: Aluminium alloys
Amorphous state
Boron alloys
Chromium alloys
Cobalt alloys
Copper alloys
Iron alloys
Metallic glasses
Nickel alloys
Plastic deformation
Shear deformation
Silicon alloys
Stress-strain relations
Zirconium alloys
Issue Date: 15-Oct-2009
Publisher: American Institute of Physics
Source: Journal of applied physics, 15 Oct. 2009, v. 106, no. 8, 083512, p. 1-6.
Abstract: Based on mechanical instability of individual shear transformation zones (STZs), a quantitative link between the microplastic instability and macroscopic deformation behavior of metallic glasses was proposed. Our analysis confirms that macroscopic metallic glasses comprise a statistical distribution of STZ embryos with distributed values of activation energy, and the microplastic instability of all the individual STZs dictates the macroscopic deformation behavior of amorphous solids. The statistical model presented in this paper can successfully reproduce the macroscopic stress-strain curves determined experimentally and readily be used to predict strain-rate effects on the macroscopic responses with the availability of the material parameters at a certain strain rate, which offer new insights into understanding the actual deformation mechanism in amorphous solids.
Rights: © 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Y. Wu et al., J. Appl. Phys. 106, 083512 (2009) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.3247968
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:ME Journal/Magazine Articles

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