Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12556
Title: Encapsulated Zr-based bulk metallic glass with large plasticity
Authors: Chen, W
Chan, KC 
Yu, P
Wang, G
Keywords: Copper coatings
Mechanical properties
Zr-based bulk metallic glass
Issue Date: 2011
Publisher: Elsevier
Source: Materials science and engineering. A, Structural materials : properties, microstructure and processing, 2011, v. 528, no. 6, p. 2988-2994 How to cite?
Journal: Materials science and engineering. A, Structural materials : properties, microstructure and processing 
Abstract: Copper (Cu) coatings were electroplated onto Zr57Al10Ni8Cu20Ti5 bulk metallic glass (BMG) in three different ways; laterally coated, two ends coated, and completely wrapped/encapsulated. The mechanical behavior of these three different types of specimen were investigated. The results show that, as compared to the poor ductility (∼2%) of the uncoated specimen, the side surface coated specimen exhibits a higher ductility of around 6.5% plastic strain before failure, under the effect of the lateral confinement by the Cu coating. Thanks to the elimination of friction between the platens and the specimen, the two ends coated specimen further demonstrates a larger plasticity of ∼13%. Most interestingly, the largest plastic strain of ∼20% was obtained in the completely encapsulated specimen. This drastic increase in plasticity is believed to originate from the changes of the frictional boundary conditions, the lateral confining stress and the deformation induced heterogeneous microstructure.
URI: http://hdl.handle.net/10397/12556
ISSN: 0921-5093
EISSN: 1873-4936
DOI: 10.1016/j.msea.2010.12.077
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