Fatigue behavior and fracture morphology of Zr50Al10Cu40 and Zr50Al10Cu30Ni10 bulk-metallic glasses

2004 ◽  
Vol 12 (10-11) ◽  
pp. 1219-1227 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
W.H. Peter ◽  
B. Yang ◽  
M. Freels ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
Fracture Morphology

Direct Comparisons of the Fatigue Behavior of Bulk-Metallic Glasses and Crystalline Alloys

2008 ◽  
Vol 378-379 ◽  
pp. 329-338 ◽  
Author(s):  
G.Y. Wang ◽  
Peter K. Liaw ◽  
Yokoyama Yoshihiko ◽  
A. Peker ◽  
M. Freels ◽  
...  
Keyword(s):  
Tool Steel ◽  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
Fatigue Property ◽  
Fracture Morphology ◽  
R Ratio ◽  
Al 7075 ◽  
7075 Alloy ◽  
Drill Tool

Recent research works on bulk-metallic glasses (BMGs) have opened a window to create a new generation of structural materials for applications. Although the mechanical behavior of BMGs is being studied widely, the fatigue characteristics are poorly understood. The uniaxial tension-tension high-cycle fatigue (HCF) studies were performed on zirconium (Zr)-based bulk-metallic glasses (BMGs): Zr50Cu40Al10, Zr50Cu30Al10Ni10, Zr50Cu37Al10Pd3, and Zr41.2Cu12.5Ni10Ti13.8Be22.5, in atomic percent. The HCF experiments were conducted using an electrohydraulic machine at a frequency of 10 Hz with a R ratio of 0.1, where R = σmin./σmax., where σmin. and σmax. are the applied minimum and maximum stresses, respectively. The fatigue-endurance limit of Zr50Cu37Al10Pd3 was significantly greater than those of Zr50Cu40Al10, Zr50Cu30Al10Ni10, and Zr41.2Ti13.8Cu12.5Ni10Be22.5. In order to compare the fatigue property with the crystalline alloys, the same HCF experiments were also performed on Ti-6-4, drill tool steel, and Al 7075. The fatigue lifetime of Zr-based BMGs is generally comparable to those of Ti-6-4 and drill-tool-steel crystalline alloys and is greater than that of Al 7075 alloy. The fracture morphology of BMGs indicates that fatigue-crack-propagation region included the distinct rough striations and the fine striations. The possible mechanism for the striation formation was proposed.

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.

Studying fatigue behavior and Poisson's ratio of bulk-metallic glasses

2007 ◽  
Vol 15 (5-6) ◽  
pp. 663-667 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
Y. Yokoyama ◽  
A. Peker ◽  
W.H. Peter ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Poisson’S Ratio ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
Poisson's Ratio

Fatigue behavior of Zr–Ti–Ni–Cu–Be bulk-metallic glasses

2005 ◽  
Vol 13 (3-4) ◽  
pp. 429-435 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
A. Peker ◽  
B. Yang ◽  
M.L. Benson ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses

The influence of Pd on tension–tension fatigue behavior of Zr-based bulk-metallic glasses

2010 ◽  
Vol 32 (3) ◽  
pp. 599-604 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
Y. Yokoyama ◽  
M. Freels ◽  
A. Inoue
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses

Bending-fatigue behavior of bulk metallic glasses and their composites

JOM ◽  
2010 ◽  
Vol 62 (4) ◽  
pp. 25-33 ◽  
Author(s):  
Gongyao Wang ◽  
Peter K. Liaw
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
Bending Fatigue

Influence of air and vacuum environment on fatigue behavior of Zr-based bulk metallic glasses

2007 ◽  
Vol 434-435 ◽  
pp. 68-70 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
Y. Yokoyama ◽  
W.H. Peter ◽  
B. Yang ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses

The Effects of Annealing on Fatigue Behavior in Zr-based Bulk Metallic Glasses

2011 ◽  
Vol 1300 ◽  
Author(s):  
Peng Tong ◽  
Despina Louca ◽  
Yoshihiko Yokoyama ◽  
Anna Llobet ◽  
Gongyao Wang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Metallic Glasses ◽  
Local Structure ◽  
Structural Changes ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
Fatigue Loading ◽  
Annealed Sample ◽  
Loading Conditions ◽  
Pair Density

ABSTRACTThe effects of annealing and fatigue on the local structure of Zr50Cu40Al10 and Zr60Cu30Al10 bulk metallic glasses (BMG) were investigated using the pair density function (PDF) analysis of synchrotron X-ray and neutron diffraction data. Our results indicate that the two compositions respond differently to annealing. The first PDF peak becomes sharper after annealing in Zr50Cu40Al10 with its intensity increasing, indicating that short-range ordering may be induced after the heat treatment. On the other hand, in Zr60Cu30Al10, the effects due to the heat treatment on the local structure are more subtle. Separately, the as-quenched and annealed alloys with the composition Zr50Cu40Al10 were subjected to fatigue loading conditions with ~ 106 compression cycles. The room temperature measurements showed changes in the local structure with fatigue especially for the annealed sample, involving the Cu-Zr correlations. Our results suggest that the physical properties of BMGs upon fatigue loading conditions may become accentuated due to the structural relaxation brought upon by annealing, leading to observable structural changes at the atomic level from fatigue.

Effects of partial crystallization on compression and fatigue behavior of Zr-based bulk metallic glasses

2007 ◽  
Vol 22 (2) ◽  
pp. 493-500 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
Y. Yokoyama ◽  
M. Freels ◽  
R.A. Buchanan ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Amorphous Alloys ◽  
Shear Fracture ◽  
Fatigue Behavior ◽  
Compressive Loading ◽  
Bulk Metallic Glasses ◽  
X Ray Diffraction ◽  
Partial Crystallization ◽  
Point Bend ◽  
Fatigue Endurance

Zr50Cu40Al10, Zr50Cu30Al10Ni10, and Zr50Cu37Al10Pd3 (in at.%) are bulk metallic glasses (BMGs) with partial crystallization that were characterized by x-ray diffraction (XRD). The study of mechanical properties was conducted in compression at room temperature. Four-point-bend fatigue experiments were performed on the zirconium (Zr)-based BMGs in air. Under compressive loading, after the elastic deformation, no obvious plasticity occurred before the final shear fracture. The compression strengths are comparable to those of fully amorphous alloys. However, the fatigue-endurance limits of these BMGs were much lower than those of fully amorphous alloys. These results suggested that the fatigue behavior of a BMG is very sensitive to the microstructure, while the compression strength is not.

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