High-Strain-Rate Dynamic Mechanical Properties of a W-Reinforced Zr-Based Bulk Metallic Glass Composite

2005 ◽  
Vol 903 ◽  
Author(s):  
Morgana Martin ◽  
Naresh N. Thadhani ◽  
Laszlo J. Kecskes ◽  
Robert J. Dowding
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
High Speed ◽  
Phase Distribution ◽  
Dynamic Compression ◽  
Plastic Property ◽  
Quantitative Information ◽  
Dynamic Mechanical Properties ◽  
Compression Tests ◽  
Deformation And Failure

AbstractThe structural/mechanical behavior of zirconium-based (Vitreloy106) bulk metallic glass reinforced with tungsten particles is evaluated using elastic and plastic property measurements via static and dynamic compression tests performed on rod shaped samples. Anvil-on-rod impact tests combined with high-speed digital photography and velocity interferometry are used to obtain qualitative and quantitative information about the transient deformation and failure response of the composites. The deformation and failure mechanisms of recovered impacted specimens are also characterized and correlated with their structure and tungsten phase distribution. The results of these experiments and initial attempts at validating constitutive equations based on homogeneous/inhomogeneous plastic/viscous flow in glassy and glassy-crystalline composites will be presented.

Deformation and Failure of Zr57Ti5Cu20Ni8Al10 Bulk Metallic Glass Under Quasi-static and Dynamic Compression

2002 ◽  
Vol 17 (6) ◽  
pp. 1441-1445 ◽  
Author(s):  
T. C. Hufnagel ◽  
T. Jiao ◽  
Y. Li ◽  
L-Q. Xing ◽  
K. T. Ramesh
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
High Speed ◽  
Dynamic Compression ◽  
Shear Bands ◽  
Band Formation ◽  
Deformation And Failure ◽  
Dominant Deformation Mechanism ◽  
High Speed Cinematography ◽  
Mechanism Of Failure

We have examined the mechanical behavior of Zr57Ti5Cu20Ni8Al10 bulk metallic glass under uniaxial compression at strain rates from 10−4to 3 × 103 s−1. The failure stress decreases with increasing strain rate, and shear-band formation remains the dominant deformation mechanism. A consideration of basic properties of adiabatic shear bands makes it appear unlikely that shear bands formed under quasi-static loading are adiabatic; in the dynamic case, the time scales of deformation and thermal conduction are similar, indicating that a more sophisticated calculation is required. In the dynamic tests, however, high-speed cinematography reveals evidence that the mechanism of failure involves an adiabatic component.

Effect of Strain Rate on Compressive Behavior of a ZrCuNiAl Bulk Metallic Glass at Room Temperature

2021 ◽  
Vol 1016 ◽  
pp. 1569-1575
Author(s):  
Zhi Ping Guo ◽  
Chuan Ting Wang ◽  
Yong He ◽  
Yuan He ◽  
Lei Guo ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Strain Rate ◽  
Bulk Metallic Glass ◽  
Temperature Rise ◽  
Room Temperature ◽  
Dynamic Compression ◽  
Rate Sensitivity ◽  
Compression Tests ◽  
Compressive Behavior ◽  
Negative Strain Rate Sensitivity

In this study, quasi-static and dynamic compression tests were performed on a ZrCuNiAl bulk metallic glass. The results demonstrated that the ZrCuNiAl bulk metallic glass changed from plastic deformation without strain rate effect to brittle fracture with negative strain rate sensitivity. The fracture surface morphology was related to the strain rate and temperature rise. The modified cooperative-shear model was determined to describe the effect of strain rate and temperature rise on the yield stress of ZrCuNiAl bulk metallic glass.

Influence of annealing on structural relaxation, crystallization, and deformation behavior of a Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass

2007 ◽  
Vol 22 (7) ◽  
pp. 1849-1858 ◽  
Author(s):  
Kwang Seok Lee ◽  
Jürgen Eckert ◽  
Hyun-Joon Jun ◽  
Young Won Chang
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Deformation Behavior ◽  
Structural Changes ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Liquid Region ◽  
Compression Tests ◽  
X Ray

The influence of annealing on the structural changes and the mechanical properties of Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit-1) bulk metallic glass was systematically studied by varying the annealing times at 703 K. The evolution of the structural state at a relatively high temperature within the supercooled liquid region was studied by thermal analysis, x-ray diffraction, high-resolution transmission electron microscopy, extended x-ray absorption fine structure, and dilatometric measurements. The deformation behavior and the mechanical properties were also examined by carrying out hardness and compression tests for the specimens annealed for various times.

Plastic flow in dynamic compression of a Zr-based bulk metallic glass

2006 ◽  
Vol 21 (6) ◽  
pp. 1570-1575 ◽  
Author(s):  
W.H. Jiang ◽  
F.X. Liu ◽  
D.C. Qiao ◽  
H. Choo ◽  
P.K. Liaw
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Free Volume ◽  
Plastic Flow ◽  
Dynamic Compression ◽  
Maximum Shear Stress ◽  
Shear Banding ◽  
Shear Bands ◽  
Free Volume Model ◽  
Geometrically Constrained

Using geometrically constrained specimens, the plastic flow behaviors of the as-cast and the relaxed Zr52.5Cu17.9Ni14.6Al10.0Ti5.0 bulk metallic glass in the dynamic compression were investigated. Both alloys exhibit a significant plasticity in the dynamic compression. The plastic deformation in both alloys is still inhomogeneous, which is characterized by the serrated plastic flow and the formation of shear bands. Free volumes affect the shear banding and the plastic flow. The reduced free volume results in the deviation of the shear banding direction from the maximum shear stress. The relaxed alloy exhibits the obvious stress overshoot, which is consistent with the theoretical prediction using a free volume model.

DYNAMIC COMPRESSION OF A ZIRCONIUM-BASED BULK METALLIC GLASS CONFINED BY A 316 STAINLESS STEEL SLEEVE

2008 ◽  
Author(s):  
Morgana Martin ◽  
Laszlo Kecskes ◽  
Naresh N. Thadhani ◽  
Mark Elert ◽  
Michael D. Furnish ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Dynamic Compression ◽  
316 Stainless Steel ◽  
Steel Sleeve
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