Tribological Characteristics of Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 Bulk Metallic Glass

1998 ◽  
Vol 554 ◽  
Author(s):  
Xi-Yong Fu ◽  
D. A. Rigney
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Normal Load ◽  
Disk Surface ◽  
Test System ◽  
Kelvin Probe ◽  
Material Transfer ◽  
Surface Appearance ◽  
Wear Rates ◽  
Lower Load

AbstractThe sliding characteristics of Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 bulk metallic glass have been examined in vacuum and in air using a pin/disk geometry without lubrication. The counterface material was either the same metallic glass (self-mated) or 52100 steel. Normal load was 0.1–1 kgf. The test system was equipped for continuous measurement of friction force. In addition, a Kelvin probe allowed continuous monitoring of changes in the structure and chemistry of the disk surface. Post-test characterization included optical and electron microscopy, X-ray diffraction and EDS of worn surfaces and debris. Friction coefficients in both vacuum and air were typical of those expected for ductile materials, with values ranging from 0.4 to 0.9 (higher values with lower load). Wear rates and average debris size increased with load. Wear rates were larger in air than in vacuum. Wear surface appearance and chemical composition were influenced by plastic deformation, material transfer and environmental interactions. After tests in air, the wear tracks and debris had a granular appearance and oxygen concentrations were high. Changes in the Kelvin probe signal correlated well with visual observations and with concentrations of oxygen detected by EDS.

scholarly journals Wear Behaviors of a Ti-Based Bulk Metallic Glass at Elevated Temperatures

2021 ◽  
Vol 8 ◽  
Author(s):  
Fuyang Cao ◽  
Yongjiang Huang ◽  
Chao He ◽  
Hongbo Fan ◽  
LiYuan Wei ◽  
...  
Keyword(s):  
Wear Rate ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elevated Temperatures ◽  
Normal Load ◽  
High Hardness ◽  
Sample Surface ◽  
Testing Temperature ◽  
Industrial Applications ◽  
Structural Applications

Bulk metallic glasses (BMGs) often offer excellent physical, chemical, and mechanical properties such as high strength, high hardness, and good wear/corrosion resistance, stemming from their unique atomic configuration. These properties enable them to be a potential engineering material in a range of industrial applications. However, the wear behaviors must be considered in structural applications. Here, the wear tests of a TiZrNiCuBe bulk metallic glass at high temperatures were carried out. As the testing temperature increases, the wear rate of the studied BMG sample gradually decreases and the sample surface becomes smoother. Meanwhile, a higher applied normal load causes a higher wear rate. The wear mechanism evolves from the abrasive to adhesive mode with increase in the testing temperature. The results obtained here could shed more insights into the deformation mechanism of BMGs and thus extend their industrial uses in high-temperature environments.

Investigation of a Bulk Metallic Glass as a Shaped Charge Liner Material

2006 ◽  
Author(s):  
William P. Walters ◽  
Laszlo J. Kecskes ◽  
Justin E. Pritchett
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Shaped Charge ◽  
Liner Material

Strain, Stress and Stress Relaxation in Oxidized Zrcual-Based Bulk Metallic Glass

2020 ◽  
Author(s):  
Saber Haratian ◽  
Frank Niessen ◽  
Flemming B. Grumsen ◽  
Mitchell J. B. Nancarrow ◽  
Elena Pereloma ◽  
...  
Keyword(s):  
Stress Relaxation ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Strain Stress

Deformation-strengthening during rolling Cu60Zr20Ti20 bulk metallic glass

2007 ◽  
Vol 457 (1-2) ◽  
pp. 94-99 ◽  
Author(s):  
Q.P. Cao ◽  
J.F. Li ◽  
Y. Hu ◽  
A. Horsewell ◽  
J.Z. Jiang ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass
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