Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6939
Title: Revelation of the effect of structural heterogeneity on microplasticity in bulk metallic-glasses
Authors: Yang, Y
Ye, JC
Lu, J
Wang, Q
Liaw, PK
Keywords: Amorphous
Metal
Nano-indentation
Issue Date: Mar-2010
Publisher: Cambridge University Press
Source: Journal of materials research, Mar. 2010, v. 25, no. 3, p. 563-575 How to cite?
Journal: Journal of materials research 
Abstract: In this article, the shear-banding behavior in bulk metallic-glasses (BMGs) is studied using a focused ion beam (FIB)-based nanoindentation method, which involves cylindrical nanoindentation of a FIB-milled BMG microlamella and is capable of revealing the subsurface shear-band patterns down to the submicron scale. The results of the current study on a Zr-based BMG clearly show that short shear bands, with the lengths of a few hundred nanometers, could be severely kinked before growing into a longer one, which implies that structural heterogeneity plays an important role in the microplasticity of BMGs. Furthermore, through the three-dimensional finite-element simulation combined with the theoretical calculation based on the Mohr–Coulomb law, it is found that the yield strengths exhibit a large scatter as a consequence of the structural heterogeneity when microplasticity occurs in the Zr-based BMG, which is consistent with our recent findings obtained from the microcompression experiments.
URI: http://hdl.handle.net/10397/6939
ISSN: 0884-2914 (print)
2044-5326 (EISSN)
DOI: 10.1557/JMR.2010.0058
Rights: © 2010 Materials Research Society
The following article "Yong Yang, Jianchao Ye, Jian Lu, Qing Wang and Peter K. Liaw (2010). Revelation of the effect of structural heterogeneity on microplasticity in bulk metallic-glasses. Journal of Materials Research, 25(3), pp 563-575. doi:10.1557/JMR.2010.0058." is available athttp://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7938463
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