Flow serration and shear-band propagation in bulk metallic glasses

Journal Article · Mon Apr 06 04:00:00 UTC 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3117508· OSTI ID:21176102

Chen, H M; Huang, J C ^[1]; Song, S X; Nieh, T G ^[2]; Jang, J S. C. ^[3]

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1. Department of Materials and Optoelectronic Science, Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan 804 (China)
2. Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States)
3. 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, Journal Name: Applied Physics Letters Journal Issue: 14 Vol. 94; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BRITTLENESS
COPPER ALLOYS
DUCTILITY
MAGNESIUM ALLOYS
METALLIC GLASSES
NEODYMIUM ALLOYS
NICKEL ALLOYS
PALLADIUM ALLOYS
PHOSPHORUS
STRAIN GAGES
STRAIN RATE
YTTRIUM ALLOYS