Bending proof strength of Zr61Ti2Cu25Al12 bulk metallic glass and its correlation with shear-banding initiation

2020 ◽  
Vol 126 ◽  
pp. 106915
Author(s):  
Diao-Feng Li ◽  
Yong Shen ◽  
Jian Xu
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Shear Banding ◽  
Proof Strength

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 Strain-hardening and suppression of shear-banding in rejuvenated bulk metallic glass

Nature ◽  
2020 ◽  
Vol 578 (7796) ◽  
pp. 559-562 ◽  
Author(s):  
J. Pan ◽  
Yu. P. Ivanov ◽  
W. H. Zhou ◽  
Y. Li ◽  
A. L. Greer
Keyword(s):  
Metallic Glass ◽  
Strain Hardening ◽  
Bulk Metallic Glass ◽  
Shear Banding

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.

Low-temperature shear banding for a Cu-based bulk-metallic glass

2010 ◽  
Vol 63 (8) ◽  
pp. 871-874 ◽  
Author(s):  
J.W. Qiao ◽  
H.L. Jia ◽  
C.P. Chuang ◽  
E.W. Huang ◽  
G.Y. Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Shear Banding ◽  
Temperature Shear

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.

Cold versus hot shear banding in bulk metallic glass

2009 ◽  
Vol 80 (13) ◽  
Author(s):  
Y. Q. Cheng ◽  
Z. Han ◽  
Y. Li ◽  
E. Ma
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Shear Banding
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