Structural evolutionary behavior of Zr-based bulk metallic glasses under thermoplastic deformation

Zhang, Weijian; Tao, Pengcheng; Chen, Yugan; Si, Junfeng; Long, Ziyun; Huang, Shengkai; He, Huajie; Huang, Zhenghua; Yang, Yuanzheng

doi:10.1016/j.intermet.2023.107831

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…The viscosity tests were performed as a function of temperature in the SCLR using TA Q400 TMA (TA Instruments Inc., Wilmington City, DE, USA) with a 10 K min −1 heating rate and a 1 N static force. The η of BMGs was determined according to the following equation, as given in [43,44]:…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Effect of Chemical Composition on the Thermoplastic Formability and Nanoindentation of Ti-Based Bulk Metallic Glasses

Chen,

Zhu,

Chen

et al. 2024

Materials

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A series of Ti41Zr25Be34-xNix (x = 4, 6, 8, 10 at.%) and Ti41Zr25Be34-xCux (x = 4, 6, 8 at.%) bulk metallic glasses were investigated to examine the influence of Ni and Cu content on the viscosity, thermoplastic formability, and nanoindentation of Ti-based bulk metallic glasses. The results demonstrate that Ti41Zr25Be30Ni4 and Ti41Zr25Be26Cu8 amorphous alloys have superior thermoplastic formability among the Ti41Zr25Be34-xNix and Ti41Zr25Be34-xCux amorphous alloys due to their low viscosity in the supercooled liquid region and wider supercooled liquid region. The hardness and modulus exhibit obvious variations with increasing Ni and Cu content in Ti-based bulk metallic glasses, which can be attributed to alterations in atomic density. Optimal amounts of Ni and Cu in Ti-based bulk metallic glasses enhance thermoplastic formability and mechanical properties. The influence of Ni and Cu content on the hardness of Ti-based bulk metallic glasses is discussed from the perspective of the mean atomic distance.

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Section: Experimental Materials and Methodsmentioning

confidence: 99%

Effect of Chemical Composition on the Thermoplastic Formability and Nanoindentation of Ti-Based Bulk Metallic Glasses

Chen,

Zhu,

Chen

et al. 2024

Materials

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show abstract

“…An increase is also observed in yield strength when the strain rate increases from 2 × 10 −4 /s to 7.5 × 10 −3 /s in Zr 55. 7 Cu 22.4 Al 14.7 Ni 7.2 metallic glass at high temperatures, which is attributed to the migration of more atoms and the generation of more free volume, which is induced by higher stress during loading with higher strain rates [21]. Recent molecular dynamic simulations found that a higher strain rate delays mechanical transformations in regions with higher local five-fold symmetry, which retards the propagation of shear band and promotes more uniform deformation in Cu 50 Zr 50 metallic glass [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain Rate on Mechanical Deformation Behavior in CuZr Metallic Glass

Fan,

2024

Materials

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Tensile tests were performed on Cu64Zr36 metallic glass at strain rates of 107/s, 108/s, and 109/s via classical molecular dynamics simulations to explore the underlying mechanism by which strain rate affects deformation behavior. It was found that strain rate has a great impact on the deformation behavior of metallic glass. The higher the strain rate is, the larger the yield strength. We also found that the strain rate changes the atomic structure evolution during deformation, but that the difference in the atomic structure evolution induced by different strain rates is not significant. However, the mechanical response under deformation conditions is found to be significantly different with the change in strain rate. The average von Mises strain of a system in the case of 107/s is much larger than that of 109/s. In contrast, more atoms tend to participate in deformation with increasing strain rate, indicating that the strain localization degree is more significant in cases of lower strain rates. Therefore, increasing the strain rate reduces the degree of deformation heterogeneity, leading to an increase in yield strength. Further analysis shows that the structural features of atomic clusters faded out during deformation as the strain rate increased, benefiting more homogeneous deformation behavior. Our findings provide more useful insights into the deformation mechanisms of metallic glass.

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Characterization of Z cluster connectivity in CuZr metallic glasses

Amigo

2024

J Mol Model

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Structural evolutionary behavior of Zr-based bulk metallic glasses under thermoplastic deformation

Cited by 8 publications

References 36 publications

Effect of Chemical Composition on the Thermoplastic Formability and Nanoindentation of Ti-Based Bulk Metallic Glasses

Effect of Chemical Composition on the Thermoplastic Formability and Nanoindentation of Ti-Based Bulk Metallic Glasses

Effect of Strain Rate on Mechanical Deformation Behavior in CuZr Metallic Glass

Characterization of Z cluster connectivity in CuZr metallic glasses

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