Compressive fracture characteristics of Ni42Cu5Ti19Zr22.5Al8Si3.5 bulk metallic glass

The high-strain-rate mechanical properties, deformation mechanisms, and fracture characteristics of a bulk metallic glass (BMG)-matrix composite, consisting of an amorphous Zr57Nb5Cu15.4Ni12.6Al10 (LM106) matrix with crystalline tungsten reinforcement particles, were investigated using gas gun anvil-on-rod impact experiments instrumented with velocity interferometry (VISAR) and high-speed digital photography. The time-resolved elastic-plastic wave propagation response obtained through VISAR and the transient deformation states captured with the camera provided information about dynamic strength and deformation modes of the composite. Comparison of experimental measurements with AUTODYN-simulated transient deformation profiles and free surface velocity traces allowed for validation of the pressure-hardening Drucker–Prager model, which was used to describe the deformation response of the composite. The impacted specimens recovered for post-impact microstructural analysis provided further information about the mechanisms of dynamic deformation and fracture characteristics. The overall results from experiments and modeling revealed a strain to failure of ∼45% along the length and ∼7% in area, and the fracture initiation stress was found to decrease with increasing impact velocity because of the negative strain-rate sensitivity of the BMG.

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Tensile fracture characteristics and deformation behavior of a Zr-based bulk metallic glass at high temperatures

Intermetallics ◽

10.1016/j.intermet.2004.10.011 ◽

2005 ◽

Vol 13 (6) ◽

pp. 642-648 ◽

Cited By ~ 26

Author(s):

G. Wang ◽

J. Shen ◽

J.F. Sun ◽

Z.P. Lu ◽

Z.H. Stachurski ◽

...

Keyword(s):

Metallic Glass ◽

Bulk Metallic Glass ◽

High Temperatures ◽

Deformation Behavior ◽

Tensile Fracture ◽

Fracture Characteristics

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Mechanical Properties and Fracture Characteristics of Zr-Based Bulk Metallic Glass Composites Containing Carbon Nanotube Addition

Journal of Materials Research ◽

10.1557/jmr.2004.0140 ◽

2004 ◽

Vol 19 (4) ◽

pp. 1068-1076 ◽

Cited By ~ 3

Author(s):

Zan Bian ◽

Tao Zhang ◽

Hidemi Kato ◽

Masashi Hasegawa ◽

Akihisa Inoue

Keyword(s):

Mechanical Properties ◽

Carbon Nanotube ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Interfacial Reaction ◽

Fracture Strength ◽

Volume Fraction ◽

Fracture Characteristics ◽

Glass Composites ◽

Fracture Modes

Mechanical properties and fracture characteristics of Zr-based bulk metallic glass (BMG) composites containing carbon nanotube (CNT) addition were investigated in detail. The interfacial reaction between the added CNTs and the glass matrix causes the formation of some V-shape nicks on the residual CNTs. These nicks have significant effect on the mechanical properties and fracture modes of the BMG composites. The compressive fracture strength increases with increasing the volume fraction of CNT addition at first, and starts to decrease gradually when the volume fraction of CNT addition is more than 5.0%. The fracture modes of the BMG composites also change from typical shear flow deformation behavior to completely embrittling fracture gradually. The V-shape nicks originating from the interfacial reaction are responsible for the decrease of fracture strength and the variation of fracture modes.

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