Abstract
The compressive-deformation behavior of the Zr50.7Cu28Ni9Al12.3 bulk metallic glass (BMG) was investigated over a wide strain-rate range at room temperature. The yield strength of the BMG studied is independent of the strain rates applied upon quasi-static loading; however, it decreases remarkably upon dynamic loading. Serrated flows and shear bands appear at low quasi-static strain rates; nevertheless, they vanish as the strain rate increases to 1.0 × 10−1 s−1. Cracks appearing on the side surface of the fractured sample after dynamic compression yield a strain-accommodation deformation mechanism upon dynamic loading. Scanning electron microscopy observations reveal that molten liquids increase on the fractured surfaces with increasing strain rate, indicating that adiabatic heating in the shear bands is enhanced as the strain rate increases.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (NSFC) under Grant Nos. 10732010, 50871034, 50911120084, and 50771040, the Excellent Youth Foundation of Heilongjiang Province under Grant No. JC200806, and the State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology. PKL and GYW very much appreciate the support by the United States National Science Foundation (NSF), the Combined Research-Curriculum Development (CRCD) Program, under Grant Nos. EEC-9527527 and EEC-0203415, the Integrative Graduate Education and Research Training (IGERT) Program, under Grant No. DGE-9987548, the International Materials Institutes (IMI) Program, under Grant No. DMR-0231320, the Major Research Instrumentation (MRI) Program, under Grant No. DMR-0421219, the Division of Civil, Mechanical, Manufacture, and Innovation Program, under Grant No. CMMI-0900271, and the Materials World Network Program, under Grant No. DMR-00909037, with Ms. M. Poats and Drs. C.V. Hartesveldt, D. Dutta, P.W. Jennings, L.S. Goldberg, L. Clesceri, C. Huber, C.E. Bouldin, C.V. Cooper, D. Finotello, and A. Ardell as contract monitors.
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Manuscript submitted April 11, 2010.
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Zheng, W., Huang, Y.J., Wang, G.Y. et al. Influence of Strain Rate on Compressive Deformation Behavior of a Zr-Cu-Ni-Al Bulk Metallic Glass at Room Temperature. Metall Mater Trans A 42, 1491–1498 (2011). https://doi.org/10.1007/s11661-011-0632-0
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DOI: https://doi.org/10.1007/s11661-011-0632-0