Flow serration and shear-band propagation in bulk metallic glasses
- Department of Materials and Optoelectronic Science, Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan 804 (China)
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States)
- Department of Materials Science and Engineering, I-Shou University, Kaohsiung, Taiwan 840 (China)
Flow serration in bulk metallic glasses (BMGs) was analyzed using high-sensitivity strain gauges. Based on the displacement-time profile for one serration, shear-band propagating speed was determined and found to be insensitive to the applied strain rates. The disappearance of serration at high strain rates is a result that the signal of displacement burst was overwhelmed by the applied strain rate. In comparison with the ductile Pd-based and brittle Mg-based BMGs, the ductility of BMGs appears to be closely related to the dynamics during shear-band propagation.
- OSTI ID:
- 21176102
- Journal Information:
- Applied Physics Letters, Vol. 94, Issue 14; Other Information: DOI: 10.1063/1.3117508; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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