High specific strength Mg-based bulk metallic glass matrix composite highly ductilized by Ti dispersoid

Makoto Kinaka, Hidemi Kato, Masashi Hasegawa, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Mg-based bulk metallic glass matrix composite with hcp-Ti powders was fabricated by casting the mixtures of Mg65Cu25Gd10 molten alloy and pure Ti powders into a copper mold. Ti powder was spherical and less than 150 μm in diameter, and its volume fraction was controlled from 5 to 40%. Thermal stability of the glassy matrix was maintanied even in the coexistence with the Ti powders. However, Ti dispersoid caused a significant improvement on compressive ductility from 0% plastic deformation for the monolithic glass to 41% plastic deformation for the composite with 40 vol.% Ti powders. This is the first success of synthesizing Mg-based alloys with high ultimate strength of ∼900 MPa level as well as the large plastic deformation of ∼40%, and suggests a novel guideline to develop Mg-based alloys having high specific strength with high ductility.

Original languageEnglish
Pages (from-to)299-303
Number of pages5
JournalMaterials Science and Engineering A
Volume494
Issue number1-2
DOIs
Publication statusPublished - 2008 Oct 25

Keywords

  • Bulk metallic glass matrix composite
  • High specific strength
  • Mg-based alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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