Size-dependent viscosity in the super-cooled liquid state of a bulk metallic glass

2013 ◽  
Vol 102 (22) ◽  
pp. 221901 ◽  
Author(s):  
Zhen Shao ◽  
Manesh Gopinadhan ◽  
Golden Kumar ◽  
Sundeep Mukherjee ◽  
Yanhui Liu ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Liquid State ◽  
Size Dependent ◽  
Dependent Viscosity

Air oxidation of a Zr55Cu30Al10Ni5 bulk metallic glass at its super cooled liquid state

2014 ◽  
Vol 82 ◽  
pp. 410-419 ◽  
Author(s):  
Mao Zhang ◽  
Di Yao ◽  
Xinyun Wang ◽  
Lei Deng
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Liquid State ◽  
Air Oxidation

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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