Plasticity enhancement of Zr-based bulk metallic glasses by direct current electropulsing

P. Yiu, J. S.C. Jang, S. Y. Chang, Y. C. Chen, J. P. Chu, C. H. Hsueh

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Direct current electropulsing was used to improve the plasticity of (Zr 53Cu 30Ni 9Al 8) 99.5Si 0.5 bulk metallic glasses. After the electropulsing treatment, the specimen showed reductions in both the glass transition and the crystallization temperatures while retaining its amorphous structure, and both Young's modulus and the hardness decreased while the nanoindentation loading curve became more serrated. Using the bond-interface method and Vickers indentation, the treated specimen showed more branching of semi-circular shear bands and less radial shear bands compared to its as-cast counterpart. The possible plasticity enhancement mechanism of the electropulsing treatment was also discussed.

Original languageEnglish
Pages (from-to)68-72
Number of pages5
JournalJournal of Alloys and Compounds
Volume525
DOIs
StatePublished - 5 Jun 2012

Keywords

  • Amorphous materials
  • Electropulsing
  • Mechanical properties
  • Metallic glasses
  • Nanoindentation
  • Shear band

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