Plastic flow and failure resistance of metallic glass: Insight fromin situcompression of nanopillars
- 14 April 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 77 (15), 155419
- https://doi.org/10.1103/physrevb.77.155419
Abstract
We report in situ nanocompression tests of Cu-Zr-Al metallic glass (MG) pillars in a transmission electron microscope. This technique is capable of spatially and temporally resolving the plastic flow in MGs. The observations reveal the intrinsic ability of fully glassy MGs to sustain large plastic strains, which would otherwise be preempted by catastrophic instability in macroscopic samples and conventional tests. The high ductility in volume-limited MGs and the sample size effects in suppressing the rapid failure common to MGs are analyzed by modeling the evolution of the collectivity of flow defects toward localization.Keywords
This publication has 41 references indexed in Scilit:
- Mechanical Properties of Bulk Metallic GlassesMRS Bulletin, 2007
- Bulk Metallic Glasses: At the Cutting Edge of Metals ResearchMRS Bulletin, 2007
- Ductile crystalline–amorphous nanolaminatesProceedings of the National Academy of Sciences, 2007
- Super Plastic Bulk Metallic Glasses at Room TemperatureScience, 2007
- Making metallic glasses plastic by control of residual stressNature Materials, 2006
- Nonlinear dynamics, granular media and dynamic earthquake triggeringNature, 2005
- “Work-Hardenable” Ductile Bulk Metallic GlassPhysical Review Letters, 2005
- Effects of hydrostatic pressure on the flow and fracture of a bulk amorphous metalPhilosophical Magazine A, 2002
- Microstructure Controlled Shear Band Pattern Formation and Enhanced Plasticity of Bulk Metallic Glasses Containingin situFormed Ductile Phase Dendrite DispersionsPhysical Review Letters, 2000
- Dynamics of viscoplastic deformation in amorphous solidsPhysical Review E, 1998