Size-dependent “malleable-to-brittle” transition in a bulk metallic glass

2008 ◽  
Vol 93 (6) ◽  
pp. 061908 ◽  
Author(s):  
W. F. Wu ◽  
Z. Han ◽  
Y. Li
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Size Dependent ◽  
Brittle Transition

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

Ductile-to-brittle transition in a Ti-based bulk metallic glass

2009 ◽  
Vol 60 (11) ◽  
pp. 1027-1030 ◽  
Author(s):  
X.J. Gu ◽  
S.J. Poon ◽  
G.J. Shiflet ◽  
J.J. Lewandowski
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Brittle Transition ◽  
Ductile To Brittle Transition

scholarly journals Nanoindentation Investigation on the Size-Dependent Creep Behavior in a Zr-Cu-Ag-Al Bulk Metallic Glass

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 613 ◽  
Author(s):  
Z. Y. Ding ◽  
Y. X. Song ◽  
Y. Ma ◽  
X. W. Huang ◽  
T. H. Zhang
Keyword(s):  
Metallic Glass ◽  
Strain Rate ◽  
Bulk Metallic Glass ◽  
Creep Behavior ◽  
Creep Mechanism ◽  
Atomic Diffusion ◽  
Transformation Zone ◽  
Size Dependent ◽  
Strain And Strain Rate ◽  
Creep Deformations

Nanoindentation technology has been widely adopted to study creep behavior in small regions. However, nanoindentation creep behavior of metallic glass is still not well understood. In the present work, we investigated nanoindentation size effects on creep deformation in a Zr-based bulk metallic glass at room temperature. The total creep strain and strain rate of steady-state creep were gradually decreased with increasing holding depth under a Berkovich indenter, indicating a length-scale-dependent creep resistance. For a spherical indenter, creep deformations were insignificant in elastic regions and then greatly enhanced by increasing holding strain in plastic regions. Strain rate sensitivities (SRS) decreased with increasing holding depth and holding strain at first, and then stabilized as holding depth was beyond about 500 nm for both indenters. SRS values were 0.4–0.5 in elastic regions, in which atomic diffusion and free volume migration could be the creep mechanism. On the other hand, evolution of the shear transformation zone was suggested as a creep mechanism in plastic regions, and the corresponding SRS values were in the range of 0.05 to 0.3.

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