scholarly journals In-situ study of crystallization kinetics in ternary bulk metallic glass alloys with different glass forming abilities

2014 ◽  
Vol 105 (20) ◽  
pp. 201906 ◽  
Author(s):  
Si Lan ◽  
Xiaoya Wei ◽  
Jie Zhou ◽  
Zhaoping Lu ◽  
Xuelian Wu ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Crystallization Kinetics ◽  
Glass Forming ◽  
In Situ Study

In situ study on the bending strain field of a Zr-based bulk metallic glass with notch

2021 ◽  
pp. 111001
Author(s):  
Lunyong Zhang ◽  
B.T. Jiang ◽  
Y.F. Liang ◽  
Y.J. Huang ◽  
J.F. Sun
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Strain Field ◽  
In Situ Study ◽  
Bending Strain

In situ study of the shear band features of a CuZr-based bulk metallic glass composite

2019 ◽  
Vol 112 ◽  
pp. 106523 ◽  
Author(s):  
Songshan Jiang ◽  
Shu Guo ◽  
Yongjiang Huang ◽  
Zhiliang Ning ◽  
Peng Xue ◽  
...  
Keyword(s):  
Shear Band ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glass Composite ◽  
In Situ Study ◽  
Bulk Metallic Glass Composite

Enhanced plasticity in a Ti-based bulk metallic glass-forming alloy by in situ formation of a composite microstructure

2002 ◽  
Vol 17 (12) ◽  
pp. 3015-3018 ◽  
Author(s):  
G. He ◽  
W. Löser ◽  
J. Eckert ◽  
L. Schultz
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Room Temperature ◽  
Shear Bands ◽  
Temperature Deformation ◽  
Glassy Matrix ◽  
Glass Forming ◽  
Injection Casting ◽  
Composite Microstructure

A bulk metallic glass-forming Ti–Cu–Ni–Sn alloy with in situ formed composite microstructure prepared by both centrifugal and injection casting presents more than 6% plastic strain under compressive stress at room temperature. The in situ formed composite contains dendritic hexagonal-close-packed-Ti solid solution precipitates and a few Ti3Sn, β –(Cu, Sn) grains dispersed in a glassy matrix. The composite microstructure can avoid the development of the highly localized shear bands typical for the room-temperature deformation of monolithic glasses. Instead, highly developed shear bands with evident protuberance are observed, resulting in significant yielding and homogeneous plastic deformation over the entire sample.

Viscosity, Relaxation and Crystallization Kinetics In Zr-Ti-Cu-Ni-Be Strong Bulk Metallic Glass Forming Liquids

1998 ◽  
Vol 554 ◽  
Author(s):  
Ralf Busch ◽  
Andreas Masuhr ◽  
Eric Bakke ◽  
T. Andy Waniuk ◽  
William L. Johnson
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Crystallization Kinetics ◽  
Structural Relaxation ◽  
High Viscosity ◽  
Viscosity Data ◽  
Contributing Factors ◽  
Entropy Of Fusion ◽  
Glass Forming ◽  
Metallic Liquids

AbstractThe high thermal stability of bulk metallic glass (BMG) forming liquids in the undercooled state allows for measurements of thermophysical properties in a large time and temperature window. In this contribution, results on viscous flow, relaxation and crystallization of Zr-Ti-Cu- Ni-Be BMG forming alloys are presented. The data are compared with the kinetics of other metallic and non-metallic liquids. BMG formers are relatively strong liquids with melt viscosities that are about three orders of magnitude larger than in pure metals and other alloys. The strong liquid behavior of these alloys is also reflected by a small entropy of fusion and a weak temperature dependence of the thermodynamic functions upon undercooling. The high viscosity and small driving force for crystallization are major contributing factors to the high glass forming ability and low critical cooling rate. The upper portions of experimental timetemperature- transformation diagrams down to the crystallization nose can be described well using the kinetics deduced from the viscosity data. For lower temperature the viscosity can not describe the crystallization kinetics. The time scale for structural relaxation becomes larger than for diffusive hopping processes. Diffusion stays relatively fast, whereas viscosity and structural relaxation time upon undercooling follow a Vogel-Fulcher-Tammann relation.

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