scholarly journals Deformation behavior of metallic glasses with shear band like atomic structure: a molecular dynamics study

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
C. Zhong ◽  
H. Zhang ◽  
Q. P. Cao ◽  
X. D. Wang ◽  
D. X. Zhang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Shear Band ◽  
Metallic Glasses ◽  
Atomic Structure ◽  
Deformation Behavior

Atomic structure of shear bands in Cu64Zr36 metallic glasses studied by molecular dynamics simulations

2015 ◽  
Vol 95 ◽  
pp. 236-243 ◽  
Author(s):  
Shidong Feng ◽  
Li Qi ◽  
Limin Wang ◽  
Shaopeng Pan ◽  
Mingzhen Ma ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Metallic Glasses ◽  
Atomic Structure ◽  
Shear Bands ◽  
Dynamics Simulations

scholarly journals Molecular Dynamics Simulation of Structural Signals of Shear-Band Formation in Zr46Cu46Al8 Metallic Glasses

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2564
Author(s):  
Shi-Dong Feng ◽  
Keith Chan ◽  
Lei Zhao ◽  
Li-Min Wang ◽  
Ri-Ping Liu
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Shear Band ◽  
Metallic Glasses ◽  
Orientational Order ◽  
Shear Bands ◽  
Dynamics Simulation ◽  
Shear Band Formation ◽  
Band Formation ◽  
Average Size

The evolution from initiation to formation of a shear band in Zr46Cu46Al8 metallic glasses is presented via molecular dynamics simulation. The increase in number and the decrease in average size of clusters with the quasi-nearest atoms being 0 correspond to the shear-band evolution from initiation to formation. When the shear band is completely formed, the distribution of the bond orientational order q6 reaches a minimum. The maximum of the number of the polyhedral loss of Cu-centered <0, 0, 12, 0> and the minimum of the number of the polyhedral loss of Zr-centered <0, 2, 8, 5> correspond to the shear-band formation. These findings provide a strong foundation for characterizing the evolution from initiation to formation of shear bands.

scholarly journals Atomic structure of Mg-based metallic glasses from molecular dynamics and neutron diffraction

2017 ◽  
Vol 19 (12) ◽  
pp. 8504-8515 ◽  
Author(s):  
Anastasia Gulenko ◽  
Louis Forto Chungong ◽  
Junheng Gao ◽  
Iain Todd ◽  
Alex C. Hannon ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Neutron Diffraction ◽  
Metallic Glasses ◽  
Atomic Structure ◽  
Bulk Metallic Glasses ◽  
Dynamics Simulation ◽  
Classical Molecular Dynamics

We use a combination of classical molecular dynamics simulation and neutron diffraction to identify the atomic structure of five different Mg–Zn–Ca bulk metallic glasses, covering a range of compositions with substantially different behaviour when implantedin vitro.

scholarly journals Tension-Tension Fatigue Behavior of High-Toughness Zr61Ti2Cu25Al12 Bulk Metallic Glass

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2815
Author(s):  
Yu Hang Yang ◽  
Jun Yi ◽  
Na Yang ◽  
Wen Liang ◽  
Hao Ran Huang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Shear Band ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Fatigue Resistance ◽  
Metallic Glasses ◽  
Stress Amplitude ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
High Toughness

Bulk metallic glasses have application potential in engineering structures due to their exceptional strength and fracture toughness. Their fatigue resistance is very important for the application as well. We report the tension-tension fatigue damage behavior of a Zr61Ti2Cu25Al12 bulk metallic glass, which has the highest fracture toughness among BMGs. The Zr61Ti2Cu25Al12 glass exhibits a tension-tension fatigue endurance limit of 195 MPa, which is higher than that of high-toughness steels. The fracture morphology of the specimens depends on the applied stress amplitude. We found flocks of shear bands, which were perpendicular to the loading direction, on the surface of the fatigue test specimens with stress amplitude higher than the fatigue limit of the glass. The fatigue cracking of the glass initiated from a shear band in a shear band flock. Our work demonstrated that the Zr61Ti2Cu25Al12 glass is a competitive structural material and shed light on improving the fatigue resistance of bulk metallic glasses.

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