Hardness and shear band evolution in bulk metallic glasses after plastic deformation and annealing

2008 ◽  
Vol 56 (18) ◽  
pp. 5202-5213 ◽  
Author(s):  
S. Xie ◽  
E.P. George
Keyword(s):  
Plastic Deformation ◽  
Shear Band ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses

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.

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

Shear-band-to-crack transition in bulk metallic glasses under quasi-static and dynamic shearing

2019 ◽  
Vol 521 ◽  
pp. 119484 ◽  
Author(s):  
Ding Zhou ◽  
Xianhang Zhao ◽  
Bingjin Li ◽  
Naidan Hou ◽  
Zihao Ma ◽  
...  
Keyword(s):  
Shear Band ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Crack Transition ◽  
Dynamic Shearing

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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