Wei Peng, Taihua Zhang, Yuan Liu, Lei Li, and Bingchen Wei, Critical serrated flow features during nanoindentation in La-based bulk metallic glasses, J. Univ. Sci. Technol. Beijing, 14(2007), No. S1, pp. 8-12. https://doi.org/10.1016/S1005-8850(07)60098-X
Cite this article as:
Wei Peng, Taihua Zhang, Yuan Liu, Lei Li, and Bingchen Wei, Critical serrated flow features during nanoindentation in La-based bulk metallic glasses, J. Univ. Sci. Technol. Beijing, 14(2007), No. S1, pp. 8-12. https://doi.org/10.1016/S1005-8850(07)60098-X
Wei Peng, Taihua Zhang, Yuan Liu, Lei Li, and Bingchen Wei, Critical serrated flow features during nanoindentation in La-based bulk metallic glasses, J. Univ. Sci. Technol. Beijing, 14(2007), No. S1, pp. 8-12. https://doi.org/10.1016/S1005-8850(07)60098-X
Citation:
Wei Peng, Taihua Zhang, Yuan Liu, Lei Li, and Bingchen Wei, Critical serrated flow features during nanoindentation in La-based bulk metallic glasses, J. Univ. Sci. Technol. Beijing, 14(2007), No. S1, pp. 8-12. https://doi.org/10.1016/S1005-8850(07)60098-X
La57.6Al17.5(Cu,Ni)24.9 and La64Al14(Cu,Ni)22 bulk metallic glasses (BMGs) were prepared by copper-mould casting method. Plastic deformation behavior of the two BMGs at various loading rates was studied by nanoindentation. The results showed that the La57.6Al17.5(Cu,Ni)24.9 BMG with a glass transition temperature of 423 K exhibited prominent serrated flow at low loading rates, whereas less pronounced serrated flow at high rates during nanoindentation. In contrast, the La64Al14(Cu,Ni)22 BMG with a glass transition temperature of 401 K exhibited prominent serrated flow at high loading rates. The different rate dependency of serrated flow in the two La-based BMGs is related to the different glass transition temperature, and consequently the degree of viscous flow during indentation at room temperature. A smoother flow occurs in the alloy with relatively lower glass transition temperature, due to the relaxation of stress concentration.
La57.6Al17.5(Cu,Ni)24.9 and La64Al14(Cu,Ni)22 bulk metallic glasses (BMGs) were prepared by copper-mould casting method. Plastic deformation behavior of the two BMGs at various loading rates was studied by nanoindentation. The results showed that the La57.6Al17.5(Cu,Ni)24.9 BMG with a glass transition temperature of 423 K exhibited prominent serrated flow at low loading rates, whereas less pronounced serrated flow at high rates during nanoindentation. In contrast, the La64Al14(Cu,Ni)22 BMG with a glass transition temperature of 401 K exhibited prominent serrated flow at high loading rates. The different rate dependency of serrated flow in the two La-based BMGs is related to the different glass transition temperature, and consequently the degree of viscous flow during indentation at room temperature. A smoother flow occurs in the alloy with relatively lower glass transition temperature, due to the relaxation of stress concentration.
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