Size Effect on Flow Behavior of a Zr55Al10Ni5Cu30 Bulk Metallic Glass in Supercooled Liquid State

2014 ◽  
Vol 45 (8) ◽  
pp. 3505-3511 ◽  
Author(s):  
X. Y. Wang ◽  
L. Deng ◽  
N. Tang ◽  
J. S. Jin
Keyword(s):  
Metallic Glass ◽  
Size Effect ◽  
Bulk Metallic Glass ◽  
Liquid State ◽  
Flow Behavior ◽  
Supercooled Liquid ◽  
Supercooled Liquid State

Size Effect on the Micro-Extrusion Forming of Zr-Based Amorphous Alloys

2011 ◽  
Vol 228-229 ◽  
pp. 586-591 ◽  
Author(s):  
Xiao Wu ◽  
Chun E Xue
Keyword(s):  
Metallic Glass ◽  
Size Effect ◽  
Bulk Metallic Glass ◽  
Apparent Viscosity ◽  
Liquid State ◽  
Amorphous Alloys ◽  
Micro Parts ◽  
Inner Diameter ◽  
Extrusion Forming ◽  
Significant Size

Micro-extrusion of a Zr-based bulk metallic glass in its super-cooled liquid state is explored as a method to create objects of cup-shaped micro-parts. The effects of overall dimensions of the samples and the ratio of inner diameter to out diameter (i) on the forming are determined. The results reveal that the apparent viscosity of the forming liquid increases along with the rises of i or with the decrease of the overall dimensions, and the increasing speed is more quickly while i is greater than 0.833, which suggest that there exists significant size effect. More generally, the results suggest that large i, and a low overall dimensions are attributes indicating difficulty for forming.

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