Understanding the plasticity of amorphous alloys via the interpretation of structural evolution inside a shear band

Title
Understanding the plasticity of amorphous alloys via the interpretation of structural evolution inside a shear band
Authors
이창면박경원이병주심재혁이재철
Keywords
Amorphous alloys; Free volume; Structural disorder; Molecular dynamics; Shear band
Issue Date
2009-05
Publisher
한국재료학회지; Korean Journal of Materials Research
Citation
VOL 19, NO 5, 276-280
Abstract
The effect of the initial packing structure on the plasticity of amorphous alloys was investigated by tracing the structural evolution of the amorphous solid inside a shear band. According to the molecular dynamics simulations, the structural evolution of the amorphous solids inside the shear band was more abrupt in the alloy with a higher initial packing density. Such a difference in the structural evolution within the shear band observed from the amorphous alloys with different initial packing density is believed to cause different degrees of shear localization, providing an answer to the fundamental question of why amorphous alloys show different plasticity. We clarify the structural origin of the plasticity of bulk amorphous alloys by exploring the microstructural aspects in view of the structural disordering, disorder-induced softening, and shear localization using molecular dynamics simulations based on the recently developed MEAM (modified embedded atom method) potential.
URI
http://pubs.kist.re.kr/handle/201004/35653
ISSN
1225-0562
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KIST Publication > Article
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