scholarly journals Temperature dependent dynamics transition of intermittent plastic flow in a metallic glass. I. Experimental investigations

2013 ◽  
Vol 114 (3) ◽  
pp. 033520 ◽  
Author(s):  
Z. Y. Liu ◽  
G. Wang ◽  
K. C. Chan ◽  
J. L. Ren ◽  
Y. J. Huang ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Plastic Flow ◽  
Experimental Investigations ◽  
Temperature Dependent

scholarly journals Temperature dependent dynamics transition of intermittent plastic flow in a metallic glass. II. Dynamics analysis

2013 ◽  
Vol 114 (3) ◽  
pp. 033521 ◽  
Author(s):  
Z. Y. Liu ◽  
G. Wang ◽  
K. C. Chan ◽  
J. L. Ren ◽  
Y. J. Huang ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Plastic Flow ◽  
Dynamics Analysis ◽  
Temperature Dependent

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.

A Theory of the Calender Effect in Rubberlike Materials

1945 ◽  
Vol 18 (4) ◽  
pp. 772-779 ◽  
Author(s):  
L. Bilmes
Keyword(s):  
Molecular Structure ◽  
Experimental Data ◽  
Plastic Flow ◽  
Elastic Deformation ◽  
Polyvinyl Chloride ◽  
Mechanical Model ◽  
Temperature Dependent ◽  
Yield Values ◽  
Rubberlike Materials

Abstract The facts relating to the calender effected are briefly stated and illustrated by experimental data obtained with calendered plasticized polyvinyl chloride sheet. The nature of rubberlike deformation is outlined. A theory of the calender effect is proposed in terms of a mechanical model whose relation to molecular structure is indicated. The theory postulates that temperature-dependent yield values be associated with the mechanisms of high elastic deformation and plastic flow.

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.

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