scholarly journals Strain rate dependence of plastic flow in Ce-based bulk metallic glass during nanoindentation

2007 ◽  
Vol 22 (2) ◽  
pp. 258-263 ◽  
Author(s):  
B.C. Wei ◽  
L.C. Zhang ◽  
T.H. Zhang ◽  
D.M. Xing ◽  
J. Das ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Metallic Glass ◽  
Strain Rate ◽  
Bulk Metallic Glass ◽  
Loading Rate ◽  
Shear Banding ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Serrated Flow ◽  
Rate Dependent

The strain rate dependence of plastic deformation of Ce60Al15Cu10Ni15 bulk metallic glass was studied by nanoindentation. Even though the ratio of room temperature to the glass transition temperature was very high (0.72) for this alloy, the plastic deformation was dominated by shear banding under nanoindentation. The alloy exhibited a critical loading rate dependent serrated flow feature. That is, with increasing loading rate, the alloy exhibited a transition from less prominent serrated flow to pronounced serrated flow during continuous loading but from serrated to smoother flow during stepped loading.

Strain-rate dependence of hardening and softening in compression of a bulk-metallic glass

2007 ◽  
Vol 22 (10) ◽  
pp. 2655-2658 ◽  
Author(s):  
W.H. Jiang ◽  
F.X. Liu ◽  
F. Jiang ◽  
K.Q. Qiu ◽  
H. Choo ◽  
...  
Keyword(s):  
Flow Stress ◽  
Metallic Glass ◽  
Strain Rate ◽  
Bulk Metallic Glass ◽  
Plastic Flow ◽  
Shear Banding ◽  
Constant Strain Rate ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Plastic Flow Stress

We investigated the effect of strain rate on the plastic-flow stress of a Zr-based bulk-metallic glass in quasistatic compression. The results indicate that the plastic-flow stress is dependent on the strain rate: an increase in the strain rate leads to a decrease in the plastic-flow stress, and vice versa. However, simply loading, unloading, and reloading at a constant strain rate do not change the plastic-flow stress. This strain-rate dependence of the plastic-flow stress may be related to shear-banding operations.

scholarly journals Characterization of rate-dependent shear behavior of Zr-based bulk metallic glass using shear-punch testing

2006 ◽  
Vol 21 (1) ◽  
pp. 153-160 ◽  
Author(s):  
L.F. Liu ◽  
L.H. Dai ◽  
Y.L. Bai ◽  
B.C. Wei ◽  
J. Eckert
Keyword(s):  
Metallic Glass ◽  
Strain Rate ◽  
Bulk Metallic Glass ◽  
Shear Banding ◽  
Shear Bands ◽  
Transfer Model ◽  
Free Volume Theory ◽  
Rate Dependent ◽  
Shear Punch ◽  
Shear Punch Testing

In this study, the rate-dependent mechanical behavior of a Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass was studied using quasi-static and dynamic shear-punch testing at room temperature. The results demonstrate that the shear strength of this alloy is insensitive to the applied strain rate. However, the formation of shear bands and the serrated flow exhibits a significant strain rate effect. The shear banding-induced fracture patterns and the fracture-melting phenomenon were analyzed based on the free volume theory and the energy transfer model.

scholarly journals Strain Rate Dependence of Tensile Behavior in Hypoeutectic Zr-Cu-Al Bulk Metallic Glass

2008 ◽  
Vol 72 (9) ◽  
pp. 722-727 ◽  
Author(s):  
Akinori Shirota ◽  
Hitoo Tokunaga ◽  
Kazutaka Fujita ◽  
Yoshihiko Yokoyama ◽  
Hisamichi Kimura ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Strain Rate ◽  
Bulk Metallic Glass ◽  
Tensile Behavior ◽  
Rate Dependence ◽  
Strain Rate Dependence

scholarly journals Temperature, Strain and Strain Rate Dependence of Serrated Flow in Bulk Metallic Glasses

2007 ◽  
Vol 48 (7) ◽  
pp. 1774-1780 ◽  
Author(s):  
Florian H. Dalla Torre ◽  
Alban Dubach ◽  
Adrienne Nelson ◽  
Jörg F. Löffler
Keyword(s):  
Strain Rate ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Serrated Flow ◽  
Strain And Strain Rate ◽  
Temperature Strain

scholarly journals Strain rate-dependent compressive deformation behavior of Nd-based bulk metallic glass

2005 ◽  
Vol 13 (8) ◽  
pp. 827-832 ◽  
Author(s):  
L.F. Liu ◽  
L.H. Dai ◽  
Y.L. Bai ◽  
B.C. Wei ◽  
G.S. Yu
Keyword(s):  
Metallic Glass ◽  
Strain Rate ◽  
Bulk Metallic Glass ◽  
Deformation Behavior ◽  
Compressive Deformation ◽  
Rate Dependent
Sign in / Sign up

Export Citation Format

Share Document