The Coupling Effect of Small Nanocrystals and Free Volume on the Ductility of Cu46Zr47Al7Bulk Metallic Glass Alloy

2009 ◽  
Vol 11 (5) ◽  
pp. 374-379 ◽  
Author(s):  
Feng Jiang ◽  
Yanglei Zhao ◽  
Lincai Zhang ◽  
Shibin Pan ◽  
Yinggang Zhou ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Free Volume ◽  
Coupling Effect ◽  
Glass Alloy

Atomic scale calculation of the free volume in Zr2Ni metallic glass

2009 ◽  
Vol 17 (3) ◽  
pp. 98-103 ◽  
Author(s):  
F. Li ◽  
X.J. Liu ◽  
H.Y. Hou ◽  
G. Chen ◽  
G.L. Chen ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Free Volume ◽  
Atomic Scale

scholarly journals Numerical Study on the Fatigue Limit of Metallic Glasses under Cyclic Tension-Compression Loading

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1732
Author(s):  
Jinfeng Yan ◽  
Wenjun Meng ◽  
Zhi Chen ◽  
Hong Guo ◽  
Xianguo Yan
Keyword(s):  
Fatigue Life ◽  
Metallic Glass ◽  
Fatigue Limit ◽  
Free Volume ◽  
Strain Amplitude ◽  
Numerical Study ◽  
Hydrostatic Stress ◽  
Shear Banding ◽  
Engineering Application ◽  
Free Volume Theory

Numerical study was performed to determine the fatigue limit of metallic glass under tension-compression cyclic loading. A revised free-volume theory which considers the hydrostatic stress was utilized to make the predictions. Systematical simulations showed that a higher strain amplitude is prone to making the sample completely damaged earlier. However, lower strain fluctuations could result in a longer fatigue life. Shear banding evolution history described by free-volume localization could reasonably explain the mechanical responses of different samples. In addition, compressive loading could give rise to a higher stress than that under tensile loading because of hydrostatic stress contribution. In the end, a correlation between fatigue life and applied strain amplitude was plotted which could supply a guidance for designing the engineering application of metallic glass under periodic loading.

Effect of Structure Relaxation on the Plastic Deformation Behaviour in a Zr-Based BMG under Indenter

2009 ◽  
Vol 618-619 ◽  
pp. 437-441
Author(s):  
Hao Wen Xie ◽  
Peter D. Hodgson ◽  
Cui E Wen
Keyword(s):  
Plastic Deformation ◽  
Shear Band ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Free Volume ◽  
Cast Alloy ◽  
Deformation Behaviour ◽  
Shear Bands ◽  
Structure Relaxation ◽  
Effect Of Structure

Vickers and nano indentations were performed on a structurally relaxed Zr41Ti14Cu12.5Ni10Be22.5 bulk metallic glass (BMG), and the evolution of the shear bands in the relaxed BMG was investigated and compared to that in the as-cast alloy. Results indicate that the plastic deformation in the BMG with structure relaxation is accommodated by the semicircular (primary) and radial (secondary) as well as tertiary shear bands. Quantitatively, the shear band density in the relaxed alloy was much lower than that in the as-cast alloy. The annihilation of free volume caused by the annealing was responsible for the embrittlement of the sample with structure relaxation.

scholarly journals Formation and dilatation of shear bands in a Cu-Zr metallic glass: A free volume perspective

2016 ◽  
Vol 120 (23) ◽  
pp. 235101 ◽  
Author(s):  
Chunguang Tang ◽  
Hailong Peng ◽  
Yu Chen ◽  
Michael Ferry
Keyword(s):  
Metallic Glass ◽  
Free Volume ◽  
Shear Bands
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