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

    38 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

    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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