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

Chang Myeon Lee, Kyoung Won Park, Byeong Joo Lee, Jae Hyeok Shim, Jae Chul Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)276-280
Number of pages5
JournalKorean Journal of Materials Research
Volume19
Issue number5
DOIs
Publication statusPublished - 2009

Keywords

  • Amorphous alloys
  • Free volume
  • Molecular dynamics
  • Structural disorder

ASJC Scopus subject areas

  • Materials Science(all)

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