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Mechanical properties of bulk Zr₅₅Ni₅Cu₃₀Al₁₀ metallic glass alloy and Zr₅₃Ti₅Ni₁₀Cu₂₀Al₁₂ nanocrystalline-amorphous alloy were measured by compression tests at room temperature. Although no distinct plastic deformation is recognized in the Zr₅₅Ni₅Cu₃₀Al₁₀ metallic glass, the Zr₅₃Ti₅Ni₁₀Cu₂₀Al₁₂ as-quenched alloy exhibits significant plastic strain. Moreover, we found that both the strength and plastic strain increased significantly with increasing volume fraction of nanocrystals, and the plastic strain achieved a maximum in the early stage of nanocrystallization. High-resolution electron microscopy showed that nanocrystals with average grain sizes of about 2. 0 and 2. 5 nm were embedded in the amorphous matrix of the as-quenched bulk Zr₅₃Ti₅Ni₁₀Cu₂₀Al₁₂ alloy and the specimen with the maximum plastic strain, respectively.
Fan et al. (Tue,) studied this question.