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Spatial correlation of irreversible displacement in oscillatory-sheared metallic glasses |
| Shiheng Cui(崔世恒), Huashan Liu(刘华山), and Hailong Peng(彭海龙)† |
| School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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Abstract We report computer simulations on the oscillatory of CuZr metallic glasses at zero temperature with different shear amplitudes. In small system a homogenous shear deformation is found, while in large system an inhomogeneous shear deformation is found with a shear band formed. Concomitantly, spatial correlation of irreversible displacement exhibits an isotropic and exponential decay in the case of homogeneous deformation, whereas a mixed power-law and exponential decay in the case of anisotropic and inhomogeneous deformation. By projecting the azimuthal-dependent correlation function onto the spherical harmonics, we found a strong polar symmetry that accounts for the emerged shear band, and a weaker quadrupolar symmetry that accounts for the elastic filed generated by Eshelby inclusions. By this, we conclude that the anisotropy and decaying formula of the plastic correlation are dominated by the homogeneity or inhomogeneity for the deformation in the metallic glasses.
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Received: 09 March 2022
Revised: 07 April 2022
Accepted manuscript online: 11 April 2022
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PACS:
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61.43.Dq
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(Amorphous semiconductors, metals, and alloys)
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64.70.pe
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(Metallic glasses)
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62.20.fg
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(Shape-memory effect; yield stress; superelasticity)
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62.20.fq
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(Plasticity and superplasticity)
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| Fund: Project supported by the Natural Science Foundation of Hunan Province, China (Grant No. 2021JJ30833). |
Corresponding Authors:
Hailong Peng
E-mail: hailong.peng@csu.edu.cn
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Cite this article:
Shiheng Cui(崔世恒), Huashan Liu(刘华山), and Hailong Peng(彭海龙) Spatial correlation of irreversible displacement in oscillatory-sheared metallic glasses 2022 Chin. Phys. B 31 086108
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