Fatigue Behavior of Zr58Cu15.46Ni12.74Al10.34Nb2.76Y0.5 Bulk Metallic Glass Fabricated by Industrial-Grade Zirconium Raw Material

In this work, the fatigue behavior of a low-cost Zr58Cu15.46Ni12.74Al10.34Nb2.76Y0.5 (at%) bulk metallic glass (BMG) fabricated by industrial-grade Zirconium raw material was investigated under three-point bending loading mode. X-ray, fatigue tests under different stress amplitude and fatigue fractography were conducted in order to characterize the amorphous structure, fatigue stress-life (S-N) curve and fracture mechanism, respectively. It is found that the X-ray diffraction (XRD) result showed a fully amorphous structure due to high glass-forming ability, cracks initiated from inclusions near the rectangular corners at tensile surfaces and the fatigue endurance limit (~168 MPa) and fatigue ratio (~0.13) termed as fatigue endurance limit divided by ultimate tensile strength in stress amplitude were comparable to the similar BMG prepared by high pure raw materials.

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Tension-Tension Fatigue Behavior of High-Toughness Zr61Ti2Cu25Al12 Bulk Metallic Glass

Materials ◽

10.3390/ma14112815 ◽

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.

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Fatigue endurance limit and crack growth behavior of a high-toughness Zr61Ti2Cu25Al12 bulk metallic glass

Acta Materialia ◽

10.1016/j.actamat.2015.07.071 ◽

2015 ◽

Vol 99 ◽

pp. 165-175 ◽

Cited By ~ 29

Author(s):

Zhen-Qiang Song ◽

Qiang He ◽

Evan Ma ◽

Jian Xu

Keyword(s):

Metallic Glass ◽

Crack Growth ◽

Bulk Metallic Glass ◽

Endurance Limit ◽

Growth Behavior ◽

Crack Growth Behavior ◽

High Toughness ◽

Fatigue Endurance

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Response to comments on “The fatigue endurance limit of a Zr-based bulk metallic glass”

Scripta Materialia ◽

10.1016/j.scriptamat.2007.03.019 ◽

2007 ◽

Vol 57 (1) ◽

pp. 69-71 ◽

Cited By ~ 6

Author(s):

B.C. Menzel ◽

R.H. Dauskardt

Keyword(s):

Metallic Glass ◽

Bulk Metallic Glass ◽

Endurance Limit ◽

Fatigue Endurance

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Oxidation Behavior in Super-Plastic Microforming of Zr65Cu17.5Ni10Al7.5 Bulk Metallic Glass

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.117-119.1377 ◽

2011 ◽

Vol 117-119 ◽

pp. 1377-1382

Author(s):

Jun Wang ◽

Guang Lan Liao ◽

Qiang Yu ◽

Tie Lin Shi

Keyword(s):

Metallic Glass ◽

Oxide Layer ◽

Bulk Metallic Glass ◽

Room Temperature ◽

Oxidation Behavior ◽

Amorphous Structure ◽

Liquid Region ◽

Silicon Mold ◽

X Ray ◽

Super Plastic

The influence of oxidation behavior on super-plastic microforming of bulk metallic glass Zr65Cu17.5Ni10Al7.5in the super-cooled liquid region was investigated. Samples were heated in air from room temperature to 395°C, 410°C, and 430°C, respectively, and kept under each temperature for 40 minutes. The increased weight of samples and the thickness of oxide layer were measured. Subsequently, the sample was compressed under 410°C with a micro gear silicon mold. In result, the oxide layer of the gear cracked and could be easily removed; also, the X-ray diffractometer showed that the gear core below the oxide layer remained an amorphous structure. It can be concluded that the oxidation behavior of Zr65Cu17.5Ni10Al7.5does not affect the super-plastic deformation, which indicates the feasibility of super-plastic microforming process in air.

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Fatigue Behavior of A Minor Yttrium Doped ZrCuNi-Based Metallic Glass Alloy Fabricated by Industrial Grade Raw Material

MRS Advances ◽

10.1557/adv.2020.138 ◽

2020 ◽

Vol 5 (33-34) ◽

pp. 1713-1721

Author(s):

Shichao Zhou ◽

Tao Zhang ◽

Min Zhang ◽

Yong Zhang

Keyword(s):

Metallic Glass ◽

Raw Materials ◽

Fatigue Behavior ◽

Low Cost ◽

Testing Machine ◽

Test System ◽

Raw Material ◽

Industrial Grade ◽

R Ratio ◽

A Minor

ABSTRACTThe fatigue behavior of a low-cost Zr52.1Ti5Cu17.9Ni14.6Al10Y0.4 (at%) (ZrCuNi-based) bulk-metallic glass (BMG) prepared by industrial-grade material was investigated under three-point bending loading modes. In order to obtain the fatigue stress-life (S-N) data, stress-controlled experiments were conducted using a computer-controlled material test system electrohydraulic testing machine at 60 Hz with a 0.1 R ratio in the air at room temperature. The fatigue limit (~174 MPa) in stress amplitude and fatigue ratio (~0.14) of this BMG is comparative to the similar BMG (Vit-105) prepared by high pure raw materials. The crack initiated from inclusions near the rectangular corners at the outer surface of the rectangular beam due to stress concentration. The striations and vein-like patterns were observed in the crack propagation region and fast fracture region, respectively.

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