Enhancement of room-temperature plasticity in a bulk metallic glass by finely dispersed porosity

Takeshi Wada, Akihisa Inoue, Alan Lindsay Greer

Research output: Contribution to journalArticlepeer-review

136 Citations (Scopus)

Abstract

Melts of Pd42.5Cu30Ni7.5P20 (at. %) held under pressurized hydrogen are cast into bulk metallic glass (BMG) rods with fine (20-30 μm diameter) pores uniformly dispersed. The low overall porosities (<4%) lead to only small reductions in Young modulus and yield strength, but to dramatically enhanced plasticity in compression: Rupture energy as high as 295 MJ m-3, compared to 16 MJ m-3 for the pore-free BMG. The pores force the proliferation of shear bands below the overall failure stress, a process of interest for toughening BMGs, materials for which shear localization in deformation restricts structural applications.

Original languageEnglish
Article number251907
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number25
DOIs
Publication statusPublished - 2005

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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