Inherent Shear-Dilatation Coexistence in Metallic Glass
JIANG Min-Qiang1, JIANG Si-Yue1$, DAI Lan-Hong1,2
1State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 1001902State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081
Inherent Shear-Dilatation Coexistence in Metallic Glass
JIANG Min-Qiang1, JIANG Si-Yue1$, DAI Lan-Hong1,2
1State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 1001902State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081
摘要Shear deformation can induce normal stress or hydrostatic stress in metallic glasses [Nature Mater. 2 (2003) 449, Intermetallics 14 (2006) 1033]. We perform the bulk deformation of three-dimensional Cu46Zr54 metallic glass (MG) and Cu single crystal model systems using molecular dynamics simulation. The results indicate that hydrostatic stress can incur shear stress in MG, but not in crystal. The resultant pronounced asymmetry between tension and compression originates from this inherent shear-dilatation coexistence in MG.
Abstract：Shear deformation can induce normal stress or hydrostatic stress in metallic glasses [Nature Mater. 2 (2003) 449, Intermetallics 14 (2006) 1033]. We perform the bulk deformation of three-dimensional Cu46Zr54 metallic glass (MG) and Cu single crystal model systems using molecular dynamics simulation. The results indicate that hydrostatic stress can incur shear stress in MG, but not in crystal. The resultant pronounced asymmetry between tension and compression originates from this inherent shear-dilatation coexistence in MG.
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