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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Mechanical Behavior at the Nanoscale III
Presentation Title Stress Statistics and Universal Scaling Exponent Determining Strength-size Scaling at Small Scales
Author(s) , Peter M Derlet
On-Site Speaker (Planned)
Abstract Scope It is now well established that a power-law relationship exists between crystal strength and sample size. This scaling is remarkably robust for dislocated systems irrespective of a large number of various initial microstructural features. This indicates a fundamental origin that is insensitive, but not dismissive, of any particular dislocation mechanism. Here we show how this can be rationalized by a statistical approach that predicts the power-law exponent to be dependent on the universal scaling exponent for scale-free intermittent plasticity, as well on the leading order term of the underlying critical stress distribution (Phil.Mag. 2015, 95, 1829). We present an experimental verification across the nm and um size-regime of our model, which also gives insight into the underlying critical stress distribution of the deforming volume (ScriptaMater. 2015, 102, 27). The results are discussed in terms of dislocation structures at criticality and we propose further avenues to experimentally scrutinize the approach.
Proceedings Inclusion? Planned: A print-only volume


A Direct Comparison of Length Scale Strengthening from Different Dimensions
A Fast Fourier Transform Based-approach for the Modeling and Simulation of Grain Boundary Defects
A High Temperature In-situ Nanoindentation Study of Nanotwinned Silver Films
Ab Initio Modeling of Dislocation Core Properties in BCC and HCP Metals
Accurate Characterization of Interstitial Sites and Prediction of Adsorption Energetics of Hydrogen Trapping at Grain Boundaries in FCC Transition Metals: Space Tessellation Algorithm and Mechanics Model
Anisotropy in Nanolamellar Pearlitic Steels Investigated at the Micron Scale
Anisotropy, Size, and Aspect Ratio Effects in Micropillar Compression of Al-SiC Nanolaminate Composites
Atomic-scale Investigation on the Nucleation of Twinning-like Lattice Reorientation in Hexagonal Close-packed Metals
Capturing the Collaborative Strengthening Effects of Dislocations and Nanoscale Obstacles
Correlating In and Ex Situ Nanomechanical Measurements
Deformation Mechanisms and Instabilities in Metallic Multilayer on the Nanoscale
Ductile Crack Growth in Face-Centered Cubic Metal Nanosheets
Dynamic Behavior of a Nanocrystalline Cu-Ta Alloy
Dynamic Investigations of Dislocation-Self Point Defect Interactions in BCC Metals
Effect of Annealing on Grain Boundary Character and Attendant Tensile Behavior of Nanocrystalline Nickel Thin Films
Effect of Solutes on Dislocation Nucleation from Grain Boundaries in fcc Metals
Enhancing Ductility of Metal-Metal (BCC-HCP) and Metal-Ceramic Multilayered Nanocomposites
Fatigue-induced Abnormal Grain Growth and Notch Effects in Nanocrystalline Metals
Growth and Stress-induced Transformation of Zinc Blende AlN Layers in Al-AlN-TiN Multilayers
How Microstructure and Temperature Influence the Small Scale Deformation Behavior of Au
In Situ Atomic-scale Observation of Twinning Dominated Deformation in Nanoscale BCC Bi-crystals
In Situ Nanomechanics
In Situ Study of Oxygen’s Influence on Deformation Twinning in Alpha-Titanium
In Situ TEM Characterization on Deformation of FeCoNiMnCr High Entropy Alloy
Investigation of Creep in Nanocrystalline CuTa
Is the Anomalous Slip in BCC Transition Metals a Consequence of the Transformations of the Core of Screw Dislocations by Applied Stresses?
Measurement of Plasticity in Confined Metal Thin Films
Measuring the Adhesion Energy of Carbon Nanotube Films to Substrates via Microscratch Testing
Mechanical Behavior of Nanoporous Gold and Silicon
Mechanical Behaviors of Cu-based Metallic Multilayers with Crystalline/Amorphous Layer Interfaces
Mechanical Scaling Behavior of Nanopopous Gold Based on 3D Structural Analysis and Indentation-based Testing
Mechanistic Coupling of Dislocation and Shear Transformation Zone Plasticity in Crystalline-Amorphous Nanolaminates
Microstructural Changes in Cu-based Multilayers under Cyclic Sliding Contact
Microstructural Evolution of Nanocrystalline Copper-tantalum Alloy
Microstructural Stability under Wear of Binary Nanocrystalline Alloys with Improved Thermal Stability
Microstructure and Thermo-Mechanical Properties of Porous Nano-Crystalline Silver Layers
Multi Scale Modeling of Strain Softening and Failure of Single Wall Carbon Nanotube (SWCNT) Aerogels
Nanodomains in Nickel Enable Simultaneous High Strength and Ductility: “Self-Precipitation Hardening” without Second-Phase Precipitates
Nanolamellar Tantalum Carbides: Structure and Properties
Nucleation and Evolution of Dynamic Damage at Bimetal Interfaces Using Molecular Dynamics
On the Relationship among Lattice Misorientation Field, Strain Gradient Effects, and Indentation Size Effects
Plastic Deformation in Metal/Ceramic Multilayer Nanolaminates: NbC/Nb and TiN/Ti Case Studies
ReaxFF Molecular Dynamic Research on Tribochemistry of Si/SiO2 Surface and Role of Water Molecules to Surface Wear Damage
Residual Stress in Thin Films: Effect of Growth Rate and Grain Size
Review: Fracture Strength of Micro- and Nano-scale Silicon Components
Simulations of Orientation Dependence of Strain-Hardening Characteristics and Dislocation Microstructure Evolution in 20, 6 micron Size Ni Microcrystals
Spall of Tantalum Bicrystals and Nanocrystals
Spalling Microscale, Single-crystal Films of High-quality, High-value Semiconductors
Stress and Strain Controlled Fatigue Properties of Cu with Highly Oriented Nanoscale Twins
Stress Statistics and Universal Scaling Exponent Determining Strength-size Scaling at Small Scales
Structure-mechanical Property-deformation Mechanism Relationship in Nanotwinned FCC Metallic Nanowires
The Effect of Pre-existing Defects on the Strength and Deformation Behavior of α-Fe Nanopillars
The Origins of High Hardening and Low Ductility in Magnesium
Transition of Deformation Modes in Hollow Cu-Zr Metallic Glass Nanolattices
Ultimate Solution for Ultra-thin Film Systems (2nm or below)
W-10: Dislocation Core Reconstruction Induced by Solute Atom Segregation in BCC Metals
W-11: Effect of Texture and Plastic Anisotropy on Stress-strain Response of Nanoscale Aluminum Films
W-12: Influence of Grain Refinement by Severe Plastic Deformation on Corrosion Behavior of Al5083
W-13: Investigating Structural, Physical and Mechanical Properties of Graphene/Polymer Hybrid Nanocomposites
W-14: Localized Hardness and Modulus Distribution within SiC Grain of a Reaction Bonded SiC/Si Ceramic Matrix Composite
W-15: Mechanical Behavior of a Two Phase Oxide on a Commercial Aluminum Alloy
W-16: Micromechanisms Governing Plastic Instability in Al-Li based Alloys
W-17: Microstructure and Strengthening Mechanisms of Ag/Fe Multilayers
W-18: Modelling and Calibration of a MEMS Tensile Stage for Elevated Temperature Experiments on Freestanding Metallic Thin Films
W-19: Nonlocal Crystal Plasticity Simulations of the Size-dependent Mechanical Response of fcc/bcc Multilayers
W-1: A Tale of Two Mechanisms: Strain-softening Versus Strain-hardening in Single Crystals under Small Stressed Volumes
W-20: Phase Transformation of Sub-Micrometer Shape Memory Alloys Thin Films Synthesized by Biased Target Ion Beam Deposition
W-21: Spherical Indentation Response of Ti64, Ni49.9Ti50.1 and Ni50.3Ti29.7Hf20 Shape Memory Alloys at Elevated Temperature
W-22: Stress Generation and Localization during Thin Film Coalescence Processes
W-23: Structure and Mechanical Properties of Nickel Nanoparticles And Their Epoxy Composites
W-24: The Effect of a Strut Size on the Strength of Nanoporous Cu Foams
W-25: The Microstructure and Mechanical Properties of Nanometer Al2O3/Cu Composite Fabricated by Internal Oxidation
W-26: Strain Rate Dependent Failure of Interfaces in Glass/Epoxy and Energetic Materials at Nano-Microscale via Dynamic Indentation
W-27: Evaluation of Mechanical Properties of Fe-Gd Alloys by Dynamic-Nano Indentation Method
W-28: Beam Induced Artifacts during in situ Transmission Electron Microscopy Deformation of Nanocrystalline and Ultrafine-grained Metals
W-29: Understanding the Relationship between Interface and Mechanical Properties of Cu/Nb Nanoscale Multilayers through In-situ Electromechanical Measurements
W-2: Analysis of Plastic Anisotropy in Nanotwinned Copper by a Statistical Dislocation Source Model
W-30: In Situ Nanoindentation of Fluorinated Ethylene Propylene Copolymers as Polyethylene Tetrafluoride Alternative
W-31: Determination of Unknown Single-crystal Orientation Using Transient Grating Spectroscopy and Molecular Dynamics Simulations
W-32: Deformation Behavior and Shear Band Evolution of Phase Separating Metallic Glass
W-33: Plastic Deformation in Nanocrystalline TiN at Ultra-low Stress: An In Situ Nanoindentation Study
W-3: Characterization of Grain Boundary Strain Transfer in High Purity Tantalum
W-4: Characterization of Interface Dislocations at the Ferrite/Cementite Interface
W-5: Competing Twinning Mechanisms during Mechanical Deformation of BCC Metals at Nanoscale
W-6: Computational Evaluation of Adhesion and Mechanical Properties of Nanolayered Diffusion Barrier Coating for Nuclear Applications
W-7: Coupled Atomistic-Continuum Framework of Developing Constitutive Relations of Crack Propagation
W-8: Crystal Size Effect on Twinning of Magnesium Microcrystals
W-9: Cyclic Response of Candidate Engineering Alloy Micro-beams

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