Yielding in crystalline metals is well known to be governed by dislocation dynamics; however, the structural origin of yielding in metallic glasses (MGs) still remains as an issue of intense debate despite that substantial research efforts have been expended. In this Letter, based on well-designed cyclic microcompression tests, we provide compelling experimental evidence revealing that yielding of MGs is essentially a stress-induced viscous flow process, during which the measured viscosity ranges from 1014 Pa·s to 1011 Pa·s and decreases with the increase of applied stress, resembling the “shear-thinning” behavior of non-Newtonian liquids. This stress-induced non-Newtonian flow finally leads to shear instability, which manifests itself as the phenomenon of delayed yielding common to a variety of MGs.
Skip Nav Destination
Article navigation
23 June 2014
Research Article|
June 23 2014
Origin of yielding in metallic glass: Stress-induced flow
Z. Y. Liu;
Z. Y. Liu
1Centre for Advanced Structural Materials, Department of Mechanical and Biomechanical Engineering,
City University of Hong Kong
, Tat Chee Avenue, Hong Kong, China
2Shenzhen Key Laboratory of Advanced Manufacturing Technology for Mold & Die, College of Mechatronics and Control Engineering,
Shenzhen University
, Shenzhen 518060, China
Search for other works by this author on:
M. W. Chen;
M. W. Chen
3WPI Advanced Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
Search for other works by this author on:
C. T. Liu;
C. T. Liu
a)
1Centre for Advanced Structural Materials, Department of Mechanical and Biomechanical Engineering,
City University of Hong Kong
, Tat Chee Avenue, Hong Kong, China
Search for other works by this author on:
a)
Authors to whom correspondence should be addressed. Electronic addresses: [email protected] and [email protected].
Appl. Phys. Lett. 104, 251901 (2014)
Article history
Received:
March 30 2014
Accepted:
June 05 2014
Citation
Z. Y. Liu, M. W. Chen, C. T. Liu, Y. Yang; Origin of yielding in metallic glass: Stress-induced flow. Appl. Phys. Lett. 23 June 2014; 104 (25): 251901. https://doi.org/10.1063/1.4884066
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Roadmap on photonic metasurfaces
Sebastian A. Schulz, Rupert. F. Oulton, et al.
Superconducting flip-chip devices using indium microspheres on Au-passivated Nb or NbN as under-bump metallization layer
Achintya Paradkar, Paul Nicaise, et al.
Special issue APL organic and hybrid photodetectors
Karl Leo, Canek Fuentes-Hernandez, et al.
Related Content
Size-affected shear-band speed in bulk metallic glasses
Appl. Phys. Lett. (October 2011)
Delayed shear banding and evolution of local plastic flow in a metallic glass
Appl. Phys. Lett. (September 2014)
Hardness, yield strength, and plastic flow in thin film metallic-glass
J. Appl. Phys. (September 2012)
Global melting of Zr 57 Ti 5 Ni 8 Cu 20 Al 10 bulk metallic glass under microcompression
Appl. Phys. Lett. (November 2007)
Mechanical response of GaN film and micropillar under nanoindentation and microcompression
Appl. Phys. Lett. (October 2010)