Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 496, Issue 1-2, Pages 285-290Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.05.038
Keywords
Bulk-metallic glasses; Mechanical behavior; Shear bands; Plastic deformation; Orientation effect
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Funding
- National Natural Science Foundation of China [50671076]
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By means of the constrained compression with small specimen aspect ratios, an intrinsically brittle Zr52.5Cu17.9Ni14.6Al10Ti5 bulk-metallic glass (BMG) was plastically deformed to various extents (up to 46%) at room temperature. The work-ductilising behavior of the deformed BMG was investigated under the subsequent compression with a normal specimen aspect ratio of 2. The plasticity after pre-plastic deformation was related to the spatial distribution of pre-introduced shear bands. It is found that the ductilisation of the BMG by pre-introduced shear bands depends upon their orientations, only the pre-introduced shear bands with the orientation close to the direction of maximum shear stress can effectively ductilise the BMG. The orientation effect of pre-introduced shear bands in the BMG on its work-ductilising indicates the way to further improve the plasticity of BMGs by pre-plastic deformation. (C) 2008 Elsevier B.V. All rights reserved.
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