scholarly journals Roles of nanoclusters in shear banding and plastic deformation of bulk metallic glasses

2012 ◽  
Author(s):  
T G Nieh
Keyword(s):  
Plastic Deformation ◽  
Metallic Glasses ◽  
Shear Banding ◽  
Bulk Metallic Glasses

scholarly journals Complex Dynamical Behavior in the Shear-Displacement Model for Bulk Metallic Glasses during Plastic Deformation

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Cun Chen ◽  
Shaokang Guan ◽  
Liying Zhang
Keyword(s):  
Plastic Deformation ◽  
Metallic Glasses ◽  
Shear Banding ◽  
Dynamical Behavior ◽  
Bulk Metallic Glasses ◽  
Analytical Form ◽  
Shear Displacement ◽  
Stable States ◽  
The Stability ◽  
Displacement Model

In this paper, a fresh shear-displacement model is developed for the plastic deformation of the bulk metallic glasses. The multiscale behavior in the shear banding process and the dynamics transition with the parameters are investigated in analytical form. We present a theoretical support for the transition from unstable states to stable states in the experiment by multiscale analysis and the stability analysis. With the small parameter increasing from negative to positive, the stability of the shear slipping displacement system changes, and there is a limit cycle at the transition stage. Meanwhile, the phase diagram and the power spectrum also suggest that there is dynamics transition with the parameter changing. Moreover, the complexity is analyzed for different disturbance parameters, and it is coincident with the fact that the solution is more irregular for larger disturbance. In addition, we find that the amplitude of solution decreases with the temperature decreasing, which is consistent with the experimental results that the amplitude of the serration is smaller and smaller as the temperature decreases.

Structural features of plastic deformation in bulk metallic glasses

2015 ◽  
Vol 106 (3) ◽  
pp. 031903 ◽  
Author(s):  
S. Scudino ◽  
H. Shakur Shahabi ◽  
M. Stoica ◽  
I. Kaban ◽  
B. Escher ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Structural Features

Stability of shear banding process in bulk metallic glasses and composites

2017 ◽  
Vol 32 (13) ◽  
pp. 2560-2569 ◽  
Author(s):  
Yusheng Qin ◽  
Xiaoliang Han ◽  
Kaikai Song ◽  
Li Wang ◽  
Yun Cheng ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Shear Banding ◽  
Bulk Metallic Glasses ◽  
Image Position

Abstract

Multi-step shear banding for bulk metallic glasses at ambient and cryogenic temperatures

2012 ◽  
Vol 136 (1) ◽  
pp. 75-79 ◽  
Author(s):  
J.W. Qiao ◽  
H.L. Jia ◽  
Y. Zhang ◽  
P.K. Liaw ◽  
L.F. Li
Keyword(s):  
Metallic Glasses ◽  
Shear Banding ◽  
Bulk Metallic Glasses ◽  
Cryogenic Temperatures

Effect of Minor Addition Ta on the Thermal Stability and Corrosion Resistance of Ti-Zr-Cu-Pd Bulk Metallic Glasses

2013 ◽  
Vol 750 ◽  
pp. 23-26 ◽  
Author(s):  
Feng Xiang Qin ◽  
Guo Qiang Xie ◽  
Sheng Li Zhu ◽  
Zhen Hua Dan
Keyword(s):  
Thermal Stability ◽  
Plastic Deformation ◽  
Corrosion Resistance ◽  
Metallic Glasses ◽  
Anodic Polarization ◽  
Volume Fraction ◽  
Bulk Metallic Glasses ◽  
Large Plastic Deformation ◽  
Minor Addition ◽  
Proper Volume

In this research, the effect of Ta addition on the formation, thermal stability and corrosion behavior of Ti-Zr-Cu-Pd bulk metallic glasses were investigated. The results revealed with minor addition of Ta, higher corrosion resistance and compressive strength as well as large plastic deformation were achieved. Minor addition Ta is effective for the formation of more protectively passive film during the process of anodic polarization. In addition, proper volume fraction nanoparticle with small size is responsible for the large plastic deformation of the as-cast Ti-based bulk metallic glasses with 1% Ta addition.

Effect of Cooling Rate, Tungsten Fiber Addition and Annealing on Deformation and Mechanical Properties of Zr-Based Bulk Metallic Glasses Under a Nanoindenter

2015 ◽  
Vol 1120-1121 ◽  
pp. 68-72
Author(s):  
Yi Si
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Cooling Rate ◽  
Metallic Glasses ◽  
Shear Bands ◽  
Bulk Metallic Glasses ◽  
Tungsten Fiber ◽  
Nanoindentation Instrument ◽  
Scanning Electron ◽  
Fiber Addition

The deformation and mechanical properties of Zr-based bulk metallic glasses (BMGs) under a nanoindenter and the effect of cooling rate, the effect of cooling rate, tungsten fiber addition and annealing on them have been studied by means of a nanoindentation instrument and a scanning electron microscope (SEM). The results indicate that the deformation of Zr-based BMGs under a nanoindenter is characterized by multiple shear bands and viscous flow which confirms the existence of a amount of plastic deformation. For pure quenched Zr-based BMGs, the larger the size of samples or the nearer the location away from the surface of a same sample, the smaller the values of microhardness (Hv) and elastic modulus (E); Annealing and tungsten fiber addition enhance the values of Hv and E; meanwhile, they also significantly change morphology around a nanoindenter and the amount of plastic deformation. The mechanism of plastic deformation is preliminarily analyzed.

scholarly journals Plastic deformation in Ce-based bulk metallic glasses during depth-sensing indentation

2007 ◽  
Vol 449-451 ◽  
pp. 962-965 ◽  
Author(s):  
B.C. Wei ◽  
T.H. Zhang ◽  
L.C. Zhang ◽  
D.M. Xing ◽  
W.H. Li ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Depth Sensing
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