A Ti-Zr-Be-Fe-Cu bulk metallic glass with superior glass-forming ability and high specific strength

P. Gong, X. Wang, Y. Shao, N. Chen, X. Liu, K. F. Yao

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

It has been found that alloying with Cu element could significantly enhance the glass-forming ability (GFA) of Ti-Zr-Be-Fe alloy. As a result, a series of centimeter-scale (Ti41Zr25Be28Fe 6)100-xCux (x = 0-20 at.%) bulk metallic glasses (BMGs) have been developed. Especially for those with x = 7-13 at.% Cu content, the critical size is larger than 20 mm. Among these Ti-based BMGs, (Ti41Zr25Be28Fe6) 91Cu9 (also noted as Ti37.31Zr 22.75Be25.48Fe5.46Cu9) glassy alloy exhibits superior GFA with a critical size larger than 32 mm, which is the largest size of Ti-based BMGs ever reported so far. The enhancement of the GFA is suggested to arise from the Cu addition-induced decrease in both the liquidus temperature and the Gibbs energy difference between the undercooled liquid and the crystalline phases of Ti-Zr-Be-Fe alloy. In addition to its superior GFA, the lightweight (Ti41Zr25Be28Fe 6)91Cu9 alloy also exhibits a remarkable high specific strength of 3.7 × 105 N m kg-1 and an apparent plastic strain of 1.2%.

Original languageEnglish
Pages (from-to)177-181
Number of pages5
JournalIntermetallics
Volume43
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • B. Glasses, metallic
  • B. Mechanical properties at ambient temperature
  • B. Thermal properties
  • C. Casting

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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