Y.H. Li, W. Zhang. Journal of Alloys and Compounds, 2019, 801:175-180.

Abstract:

The variations of structure and mechanical properties with sample diameter (d) for ZrAlCuNi alloys containing a high Zr content of 73 at.% were investigated. A Zr₇₃Al₈Cu₆Ni₁₃ alloy forms a single glassy phase with a d of 1.0 mm and changes to a composite of β-Zr dendrites dispersing homogeneously in metallic glass matrix when the d increases to 1.5–3.0 mm. The Zr₇₃Al₈Cu₆Ni₁₃ bulk metallic glass composites (BMGCs) exhibit high compressive plastic strain of over 35% without final failure, superior to that of 4.5% for the ϕ1.0 mm bulk metallic glass (BMG) sample, and the yield strength of ∼1510 MPa is comparable to the BMG. The mechanisms of formation of the β-Zr dendrites and plasticity improvement of the BMGCs were also discussed.

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