Giant configurational softening controls atomic-level process of shear banding in metallic glasses

2021 ◽  
Vol 5 (12) ◽  
Author(s):  
Zeng-Yu Yang ◽  
Lan-Hong Dai
Keyword(s):  
Metallic Glasses ◽  
Shear Banding ◽  
Atomic Level ◽  
Level Process

Atomic-Level Processes of Shear Band Nucleation in Metallic Glasses

2017 ◽  
Vol 119 (19) ◽  
Author(s):  
D. Şopu ◽  
A. Stukowski ◽  
M. Stoica ◽  
S. Scudino
Keyword(s):  
Shear Band ◽  
Metallic Glasses ◽  
Atomic Level

Local atomic environment and shear banding in metallic glasses

2018 ◽  
Vol 155 ◽  
pp. 129-135 ◽  
Author(s):  
Marcela Tercini ◽  
Roberto Gomes de Aguiar Veiga ◽  
Alejandro Zúñiga
Keyword(s):  
Metallic Glasses ◽  
Shear Banding ◽  
Local Atomic Environment

Atomic-level deformation of CuxZr100-x metallic glasses under shock loading

2018 ◽  
Vol 123 (21) ◽  
pp. 215101 ◽  
Author(s):  
Brian J. Demaske ◽  
Simon R. Phillpot ◽  
Douglas E. Spearot
Keyword(s):  
Metallic Glasses ◽  
Shock Loading ◽  
Atomic Level

scholarly journals Atomic-scale viscoplasticity mechanisms revealed in high ductility metallic glass films

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hosni Idrissi ◽  
Matteo Ghidelli ◽  
Armand Béché ◽  
Stuart Turner ◽  
Sébastien Gravier ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Metallic Glasses ◽  
Shear Banding ◽  
Atomic Scale ◽  
Microscopy Imaging ◽  
Rate Dependent ◽  
Imaging And Spectroscopy ◽  
Shear Transformation Zones ◽  
The Impact ◽  
Glass Films

Abstract The fundamental plasticity mechanisms in thin freestanding Zr65Ni35 metallic glass films are investigated in order to unravel the origin of an outstanding strength/ductility balance. The deformation process is homogenous until fracture with no evidence of catastrophic shear banding. The creep/relaxation behaviour of the films was characterized by on-chip tensile testing, revealing an activation volume in the range 100–200 Å3. Advanced high-resolution transmission electron microscopy imaging and spectroscopy exhibit a very fine glassy nanostructure with well-defined dense Ni-rich clusters embedded in Zr-rich clusters of lower atomic density and a ~2–3 nm characteristic length scale. Nanobeam electron diffraction analysis reveals that the accumulation of plastic deformation at room-temperature correlates with monotonously increasing disruption of the local atomic order. These results provide experimental evidences of the dynamics of shear transformation zones activation in metallic glasses. The impact of the nanoscale structural heterogeneities on the mechanical properties including the rate dependent behaviour is discussed, shedding new light on the governing plasticity mechanisms in metallic glasses with initially heterogeneous atomic arrangement.

A survey of instrumented indentation studies on metallic glasses

2004 ◽  
Vol 19 (1) ◽  
pp. 46-57 ◽  
Author(s):  
C.A. Schuh ◽  
T.G. Nieh
Keyword(s):  
Metallic Glasses ◽  
Structural Changes ◽  
Shear Banding ◽  
Depth Sensing ◽  
Future Directions ◽  
Fundamental Physics ◽  
New Approach ◽  
The Past ◽  
Rate Dependent

The development of instrumented nanoindentation equipment has occurred concurrently with the discovery of many new families of bulk metallic glass during the past decade. While indentation testing has long been used to assess the mechanical properties of metallic glasses, depth-sensing capabilities offer a new approach to study the fundamental physics behind glass deformation. This article is a succinct review of the research to date on the indentation of metallic glasses. In addition to standard hardness measurements, the onset of plasticity in metallic glasses is reviewed as well as the role of shear banding in indentation, structural changes beneath the indenter, and rate-dependent effects measured by nanoindentation. The article concludes with perspectives about the future directions for nanocontact studies on metallic glasses.

Stability of shear banding process in bulk metallic glasses and composites

2017 ◽  
Vol 32 (13) ◽  
pp. 2560-2569 ◽  
Author(s):  
Yusheng Qin ◽  
Xiaoliang Han ◽  
Kaikai Song ◽  
Li Wang ◽  
Yun Cheng ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Shear Banding ◽  
Bulk Metallic Glasses ◽  
Image Position

Abstract

Multi-step shear banding for bulk metallic glasses at ambient and cryogenic temperatures

2012 ◽  
Vol 136 (1) ◽  
pp. 75-79 ◽  
Author(s):  
J.W. Qiao ◽  
H.L. Jia ◽  
Y. Zhang ◽  
P.K. Liaw ◽  
L.F. Li
Keyword(s):  
Metallic Glasses ◽  
Shear Banding ◽  
Bulk Metallic Glasses ◽  
Cryogenic Temperatures

The nature of the atomic-level structure in the Cu–Zr binary metallic glasses

2012 ◽  
Vol 26 ◽  
pp. 8-10 ◽  
Author(s):  
Z.D. Sha ◽  
H. Pan ◽  
Q.X. Pei ◽  
Y.W. Zhang
Keyword(s):  
Metallic Glasses ◽  
Level Structure ◽  
Atomic Level ◽  
Binary Metallic Glasses

Analysis of shear banding in metallic glasses under bending

2005 ◽  
Vol 53 (15) ◽  
pp. 4087-4095 ◽  
Author(s):  
Guruswami Ravichandran ◽  
Alain Molinari
Keyword(s):  
Metallic Glasses ◽  
Shear Banding
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