Crystallization-induced plasticity of Cu-Zr containing bulk amorphous alloys

Seok Woo Lee, Moo Young Huh, Eric Fleury, Jae-chul Lee

Research output: Contribution to journalArticle

222 Citations (Scopus)

Abstract

This study examined the parameter governing the plasticity observed in various Cu-Zr containing monolithic amorphous alloys. All the alloys were fully amorphous in their as-cast condition but exhibited different plastic strains. Microscopic observations of the quasi-statically compressed alloys showed abundant nanocrystallites in the amorphous matrices in the alloys that exhibited pronounced plasticity. On the other hand, insignificant changes in the microstructure were observed in the alloy that did not show plasticity. The mechanism for the formation of these deformation-induced nanocrystallites was examined from the viewpoints of thermodynamics and kinetics. The role of the deformation-induced nanocrystallites on the plasticity of the amorphous alloy was examined using high-resolution transmission electron microscopy. The results demonstrate that compressive loading facilitates nanocrystallization in monolithic Cu-Zr containing amorphous alloys, resulting in plasticity. The parameter governing the plasticity in these monolithic Cu-Zr containing amorphous alloys lies in the activation energy for the overall crystallization process.

Original languageEnglish
Pages (from-to)349-355
Number of pages7
JournalActa Materialia
Volume54
Issue number2
DOIs
Publication statusPublished - 2006 Jan 1

Keywords

  • Bulk amorphous alloys
  • Compression test
  • Crystallization
  • DSC
  • HREM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Metals and Alloys

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