DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Atomic-scale homogeneous plastic flow beyond near-theoretical yield stress in a metallic glass

Journal Article · · Communications Materials

Abstract The onset of yielding and the related atomic-scale plastic flow behavior of bulk metallic glasses at room temperature have not been fully understood due to the difficulty in performing the atomic-scale plastic deformation experiments needed to gain direct insight into the underlying fundamental deformation mechanisms. Here we overcome these limitations by combining a unique sample preparation method with atomic force microscopy-based indentation, which allows study of the yield stress, onset of yielding, and atomic-scale plastic flow of a platinum-based bulk metallic glass in volumes containing as little as approximately 1000 atoms. Yield stresses markedly higher than in conventional nanoindentation testing were observed, surpassing predictions from current models that relate yield stress to tested volumes; subsequent flow was then established to be homogeneous without exhibiting collective shear localization or loading rate dependence. Overall, variations in glass properties due to fluctuations of free volume are found to be much smaller than previously suggested.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0016179
OSTI ID:
1768081
Journal Information:
Communications Materials, Journal Name: Communications Materials Journal Issue: 1 Vol. 2; ISSN 2662-4443
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (60)

Amplitude Modulation Atomic Force Microscopy book October 2010
Zur Theorie der Elastizit�tsgrenze und der Festigkeit kristallinischer K�rper journal July 1926
Plastic deformation in metallic glasses journal January 1979
Atomistic simulations of elastic deformation and dislocation nucleation during nanoindentation journal May 2003
Dislocation nucleation at nano-scale mechanical contacts journal January 1998
Stabilization of metallic supercooled liquid and bulk amorphous alloys journal January 2000
In situ nanoindentation in the TEM journal April 2007
Nanoindentation of metallic glasses journal January 2009
Mechanical behavior of amorphous alloys journal July 2007
Compression testing of metallic glass at small length scales: Effects on deformation mode and stability journal October 2010
Uniform tensile elongation in framed submicron metallic glass specimen in the limit of suppressed shear banding journal October 2011
Fractal growth of the dense-packing phase in annealed metallic glass imaged by high-resolution atomic force microscopy journal August 2012
Indentation size effect and shear transformation zone size in a bulk metallic glass in two different structural states journal November 2012
Ductile necking behavior of nanoscale metallic glasses under uniaxial tension at room temperature journal August 2013
A comprehensive atomistic analysis of the experimental dynamic-mechanical response of a metallic glass journal August 2014
Deformation of metallic glasses: Recent developments in theory, simulations, and experiments journal May 2016
Deformation-enhanced hierarchical multiscale structure heterogeneity in a Pd-Si bulk metallic glass journal November 2020
Study of nanoindentation behavior of amorphous alloy using molecular dynamics journal June 2014
On the use of atomic force microscopy for structural mapping of metallic-glass thin films journal January 2014
Indentation size effect in metallic glasses: Mean pressure at the initiation of plastic flow journal December 2014
Effect of the fictive temperature on the modulus, hardness, yield strength, dynamic mechanical and creep response of Zr44Ti11Cu10Ni10Be25 metallic glasses journal April 2020
Nanoindentation studies of shear banding in fully amorphous and partially devitrified metallic alloys journal July 2004
Shear bands in metallic glasses journal April 2013
Homogeneous flow of metallic glasses: A free volume perspective journal February 2006
Contact Mechanics book January 1985
Glasses made from pure metals journal August 2014
Rejuvenation of metallic glasses by non-affine thermal strain journal August 2015
Approaching the ideal elastic limit of metallic glasses journal January 2012
Tensile ductility and necking of metallic glass journal August 2007
Transition from a strong-yet-brittle to a stronger-and-ductile state by size reduction of metallic glasses journal February 2010
Local elastic properties of a metallic glass journal May 2011
Mechanical glass transition revealed by the fracture toughness of metallic glasses journal August 2018
Strain-hardening and suppression of shear-banding in rejuvenated bulk metallic glass journal February 2020
Atomic imprinting into metallic glasses journal November 2018
Structural Signature of Plasticity Unveiled by Nano-Scale Viscoelastic Contact in a Metallic Glass journal July 2016
Atomic-layer expulsion in nanoindentations on an ionic single crystal journal August 2000
Highly processable bulk metallic glass-forming alloys in the Pt–Co–Ni–Cu–P system journal May 2004
Thickness of shear bands in metallic glasses journal August 2006
Effect of sample size on deformation in amorphous metals journal April 2008
An atomically quantized hierarchy of shear transformation zones in a metallic glass journal March 2011
Room temperature homogeneous flow in a bulk metallic glass with low glass transition temperature journal April 2011
Atomic imprinting in the absence of an intrinsic length scale journal November 2020
Experimental characterization of shear transformation zones for plastic flow of bulk metallic glasses journal September 2008
Nucleation of shear bands in amorphous alloys journal March 2014
Nanometre-scale plasticity of Cu(100) journal December 2006
Atomic-scale nanoindentation: detection and identification of single glide events in three dimensions by force microscopy journal September 2011
Dislocation mechanisms in the first stage of plasticity of nanoindented Au(111) surfaces journal February 2006
Plastic flow and failure resistance of metallic glass: Insight from in situ compression of nanopillars journal April 2008
Superelongation and Atomic Chain Formation in Nanosized Metallic Glass journal May 2010
Characterization of Nanoscale Mechanical Heterogeneity in a Metallic Glass by Dynamic Force Microscopy journal March 2011
Minimum Threshold for Incipient Plasticity in the Atomic-Scale Nanoindentation of Au(111) journal March 2013
Flow Unit Perspective on Room Temperature Homogeneous Plastic Deformation in Metallic Glasses journal July 2014
Theoretical Strength and the Onset of Plasticity in Bulk Metallic Glasses Investigated by Nanoindentation with a Spherical Indenter journal September 2004
Ductile Bulk Metallic Glass journal December 2004
A Universal Criterion for Plastic Yielding of Metallic Glasses with a ( T / T g ) 2 / 3 Temperature Dependence journal November 2005
Extraction of Anisotropic Mechanical Properties From Nanoindentation of SiC-6H Single Crystals journal June 2016
An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments journal June 1992
Mechanical Properties of Bulk Metallic Glasses journal August 2007
Theory of Shear Banding in Metallic Glasses and Molecular Dynamics Calculations journal January 2007
Lower nanometer-scale size limit for the deformation of a metallic glass by shear transformations revealed by quantitative AFM indentation journal January 2015

Similar Records

Related Subjects