scholarly journals Does the fracture toughness of bulk metallic glasses scatter?

2015 ◽  
Vol 107 ◽  
pp. 1-4 ◽  
Author(s):  
Wen Chen ◽  
Jittisa Ketkaew ◽  
Ze Liu ◽  
Rodrigo Miguel Ojeda Mota ◽  
Kevin O’Brien ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
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.

Erratum to: “Size-dependent fracture toughness of bulk metallic glasses” [Acta Mater. 70 (2014) 198–207]

2014 ◽  
Vol 80 ◽  
pp. 507 ◽  
Author(s):  
Bernd Gludovatz ◽  
Steven E. Naleway ◽  
Robert O. Ritchie ◽  
Jamie J. Kruzic
Keyword(s):  
Fracture Toughness ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Size Dependent ◽  
Acta Mater

Size-dependent fracture toughness of bulk metallic glasses

2014 ◽  
Vol 70 ◽  
pp. 198-207 ◽  
Author(s):  
Bernd Gludovatz ◽  
Steven E. Naleway ◽  
Robert O. Ritchie ◽  
Jamie J. Kruzic
Keyword(s):  
Fracture Toughness ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Size Dependent

On sample size effects in fracture toughness determination of Bulk Metallic Glasses

2018 ◽  
Vol 202 ◽  
pp. 500-507 ◽  
Author(s):  
D. Geissler ◽  
J. Freudenberger ◽  
H. Wendrock ◽  
M. Zimmermann ◽  
A. Gebert
Keyword(s):  
Fracture Toughness ◽  
Sample Size ◽  
Metallic Glasses ◽  
Size Effects ◽  
Bulk Metallic Glasses

Fracture Toughness Study on Zr-based Bulk Metallic Glasses

2007 ◽  
Vol 1048 ◽  
Author(s):  
Jin-yoo Suh ◽  
Mary Laura Lind ◽  
C. Paul Kim ◽  
R. Dale Conner ◽  
William L Johnson
Keyword(s):  
Electron Microscopy ◽  
Fracture Toughness ◽  
Metallic Glasses ◽  
Shear Bands ◽  
Bulk Metallic Glasses ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Fracture Surfaces ◽  
Linear Elastic ◽  
Elastic Fracture

AbstractThe fracture toughness of Zr-based bulk metallic glasses of various compositions was studied in the as-cast and annealed condition. Properties were characterized using x-ray and differential scanning calorimetry (DSC) and fracture surfaces were examined using electron microscopy (SEM). Quaternary Zr-Ti-Cu-Be alloys consistently had linear elastic fracture toughness values greater than 80 MPa·m1/2, while Vitreloy 1, a Zr-Ti-Cu-Ni-Be alloy, had an average fracture toughness of 48.5 MPa·m1/2 with a large amount of scatter. The addition of iron to Vitreloy 1 reduced the fracture toughness to 25 MPa·m1/2. Fracture surfaces were carefully analyzed using electron microscopy. Some samples had highly jagged patterns at the beginning stage of crack propagation, and the roughness of this jagged pattern correlated well with the measured fracture toughness values. These jagged patterns, the main source of energy dissipation in the sample, were attributed to the formation of shear bands inside the sample. The Zr-Ti-Cu-Be alloy, having KQ=85 MPa·m1/2 as cast, was annealed at various time/temperature combinations. When the alloy was annealed 50°C below Tg, the fracture toughness dropped to 6 MPa·m1/2, while DSC and X-ray showed the alloy to still be amorphous. The roughness of the fracture surfaces on relaxed samples also compared well with the relative fracture toughness.

Test sample geometry for fracture toughness measurements of bulk metallic glasses

2018 ◽  
Vol 145 ◽  
pp. 477-487 ◽  
Author(s):  
Wen Chen ◽  
Haofei Zhou ◽  
Ze Liu ◽  
Jittisa Ketkaew ◽  
Ling Shao ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Test Sample ◽  
Sample Geometry

scholarly journals On the understanding of the effects of sample size on the variability in fracture toughness of bulk metallic glasses

2017 ◽  
Vol 126 ◽  
pp. 494-506 ◽  
Author(s):  
Bernd Gludovatz ◽  
Davide Granata ◽  
Keli V.S. Thurston ◽  
Jörg F. Löffler ◽  
Robert O. Ritchie
Keyword(s):  
Fracture Toughness ◽  
Sample Size ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses

Effects of loading rates, notch root radius and specimen thickness on fracture toughness in bulk metallic glasses

2007 ◽  
Vol 434-435 ◽  
pp. 22-27 ◽  
Author(s):  
Kazutaka Fujita ◽  
Akinori Okamoto ◽  
Nobuyuki Nishiyama ◽  
Yoshihiko Yokoyama ◽  
Hisamichi Kimura ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Metallic Glasses ◽  
Notch Root ◽  
Bulk Metallic Glasses ◽  
Specimen Thickness ◽  
Root Radius ◽  
Loading Rates ◽  
Notch Root Radius
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