A 'figure of merit' for susceptibility of irradiated amorphous metal alloys to thermal spike-induced plasticity
| Autor: | Richard Baumer, Michael J. Demkowicz |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Amorphous metal Quantitative Biology::Neurons and Cognition Polymers and Plastics Metallurgy Metals and Alloys 02 engineering and technology Plasticity 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials Ion Amorphous solid Stress (mechanics) Condensed Matter::Materials Science 0103 physical sciences Ceramics and Composites Figure of merit Irradiation Composite material 0210 nano-technology Anisotropy |
| Zdroj: | Acta Materialia. 102:251-262 |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2015.09.015 |
| Popis: | Thermal spikes in irradiated amorphous metal alloys emit stress pulses of sufficient intensity to trigger plastic deformation in adjacent unmelted material. This localized plasticity may lead to macro-scale anisotropic shape changes in metallic glasses under neutron or ion irradiation, even in the absence of external loading. We formulate a micromechanical model that connects thermal spike-induced plasticity (TSIP) to bulk properties of amorphous metal alloys. This model gives rise to a “figure of merit” (FOM) for ranking the susceptibility of metallic glasses to TSIP without recourse to further experiments or simulations. We validate the FOM against molecular dynamics simulations of TSIP in amorphous Cu–Nb alloys. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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