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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Ultrafine Grained Materials IX
Presentation Title Grain-Size Dependent Mechanical Behavior of Nanocrystalline Metals
Author(s) , Eric Hahn, Eduardo Bringa, Yzhe Tang
On-Site Speaker (Planned)
Abstract Scope Grain size has a profound effect on the mechanical response of metals. Molecular dynamics continues to expand its range to grain sizes up to 50 nm, albeit commonly at strain rates generally upwards of 10e6 s-1. The different grain size regimes are dominated by different mechanisms. We focus here in the region d < 100 nm, the nanocrystalline region. An interesting and representative phenomenon at this reduced spatial scale is the inverse Hall-Petch effect observed experimentally and in MD simulations in FCC, BCC, and HCP metals. We compare the results of molecular dynamics simulations with analytical models and mechanisms based on the contributions of Conrad and Narayan and Argon and Yip, who attribute the inverse Hall-Petch relationship to the increased contribution of grain-boundary shear as the grain size is reduced. The occurrence of twinning, more prevalent at the high strain rates enabled b y shock compression, is evaluated.
Proceedings Inclusion? Undecided


A Simple Mechanical Model for Grain Boundary Sliding that Accounts for the Effect of Size Distribution of Grains on the Yield Strength at Quasistatic and Dynamical Loading
Beneficial and Detrimental Effects of Heat Treatments on the Formability of Ultrafine Grained Steel
Bulk Texture Evolution of Nanolamellar Zr–Nb Composites Processed via Accumulative Roll Bonding
Comparative Study of the Wear Properties in Ultrafine-grained 5083 and 2024 Aluminum Alloys
Consolidation of Copper/Copper Oxide Nanoparticles by Spark Plasma Sintering
Creating Bulk Ultrafine-grained Laminated Structures by Equal-Channel Angular Pressing
Deformation Behavior of Ultrafine Grained Tungsten from Powder Metallurgy Processes
Deformation Mechanism of a Strong and Ductile Nanotwinned Steel
Deformation Mechanisms and Microstructural Evolution in Cu-Ag Alloys Produced by High-pressure Torsion
Developing Atomistically-Informed Interface Dislocation Dynamics (AIDD) Simulator
Development of Dislocation Structures in Hydrostatically Extruded Pure Aluminium
Dynamic Behavior and Microstructural Evolution of Nanocrystalline and Ultrafine Grained Cu-Ta Alloys
Effect of Cryorolling on the Precipitation Evolution and Properties of Al Alloys
Effect of Hydrostatic Extrusion and High Pressure Torsion on Grain Refinement and High-angle Grain Boundaries in Al5Mg Alloy
Effect of Process Control Agents on Composition, Structure, and Properties of Mechanically Alloyed Powders
Effect of Shear Strain on the Evolution of Microstructure and Microtexture in Cu/Ta multilayer during Accumulative Roll-Bonding at High Temperature
Effects of Length Scale on Creep Behavior of Bulk CuNb Nanolaminates
Effects of Severe Plastic Deformation on the Grain and Precipitate Structures in Beta Ti Alloys
Effects of Stacking Fault Energy on Dislocation Nucleation and Plastic Deformation Mechanisms in fcc Metals
Elevated Temperature Mechanical Behavior of Cryomilled UFG Al-Cu-Mg-Ag Alloys
Engineering High Strength Nanostructured Water Reactive Alloys for Multi Stage Stimulation
Enhancement on Mechanical Biocompability of Co-Cr-Mo Alloys by High-pressure Torsion and a Short-time Solution Treatment
Examining the Paradox of Strength and Ductility in Ultrafine-grained Materials
Extraordinary Strain Hardening by Gradient Structure
Extreme Strengthening in Gradient Structured Aluminum Alloy
Fracture Toughness of a Duplex Steel Deformed by High Pressure Torsion
Friction Consolidation Processing of n-Type Bismuth-Telluride Thermoelectric Material
Gradient Structures: Perspectives and Properties and Problems
Grain-Size Dependent Mechanical Behavior of Nanocrystalline Metals
Grain Boundaries in Severely Deformed Metallic Materials
Grain Boundary Motion, Solute Drag and Precipitation in Al Alloys Processed by SPD
Grain Refinement and Post Processing Phenomena in Hydrostatically Extruded Materials
Hardening by Annealing in Nanocrystalline Metals
High-Pressure Torsion and Nanoindentation
High-Pressure Torsion from 1935 to 1988
Hydrogen Diffusion in Ultrafine-Grained Iron Processed by High-Pressure Torsion
Hydrogen Generation Behavior of Ultrafine Grained Al Alloys in Pure Water after Processing by High-pressure Torsion
In-situ Observations of Mechanical Instability and Deformation Mechanisms in Nanocrystalline Thin Films
Influence of Length Scale on Mechanical Properties of Multilayered Nanocrystalline Ni-Fe at Elevated Temperature
Insights into the Thermal Stability of Nanocrystalline Pt(Au,Pd) films
Introducing Superplastic Properties in a ZK10 Magnesium Alloy by ECAP
Mechanical Alloying of Magnesium-manganese Alloys via High-pressure Torsion
Mechanical Anisotropy and Kink Banding in Bulk Accumulative Roll Bonded Cu-Nb Nanolaminates
Mechanical Behavior of UFG-Al/B4C Composites Tubes Produced by Severe Plastic Deformation Consolidation of Powders
Mechanical Behavior of Ultrafine-grain Gradient Structures Produced via Ambient and Cryogenic Surface Mechanical Attrition Treatment
Mechanical Behavior of Ultrafine Grained High-Mn Steels Containing Nano-scale Oxides
Mechanical Properties and Deformation Behavior of High-Mn Austenitic Steels with Fully Recrystallized Ultrafine Grained Structure
Mechanical Properties of Pure Titanium and a Ti-45Nb Alloy: A Comparative Study
Mechanisms of Grain Boundary Diffusion in Severely Deformed Materials
Microstructural Evolution and Mechanical Properties of a Titanium Alloy Processed by High-pressure Torsion
Microstructural Instabilities in Cyclically Loaded ufg Metals
Microstructural Refinement, Rate Sensitivity and Structural Stability of Cu-X Solid Solutions after Severe Plastic Deformation
Microstructure and Mechanical Behavior of Ultrafine-grained Al–Mg–Si–(Cu) Alloys Fabricated by Severe Plastic Deformation
Microstructure and Mechanical Properties of AA5083 Produced through Cryogenic Attrition and HIP
Microstructure Evolution, Defect Structure and Mechanical Properties in Ultrafine-grained MgGd Alloy Processed by High Pressure Torsion
Microstructure Evolution, Phase Stability and Mechanical Behavior of Ultra-fine Grained AlFeNiCuCoCr High Entropy Alloy Processed by Severe Plastic Deformation
Microstructure, Texture and Mechanical Properties of ARB Processed Aluminium Laminates
Modeling Effects of Grain Boundary Sliding on Crystallographic Texture and Grain Shape Evolution Using Explicit Grain Structure Models
Multi-scale Investigation on Yield “Symmetry” and Reduced Strength Differential in an UFG Mg-Y Alloy
Nanocrystalline Grain Boundary Network Evolution
Nanodomains in Nickel Enable Simultaneous High Strength and Ductility
Nanostructured Al and Cu Alloys with Superior Strength and Electrical Conductivity
New Advances in High Pressure Torsion Processing
Nitriding of Nanocrystalline Metals Generated by Ultrasonic Nanocrystal Surface Modification
Peculiar Mechanical Properties and Microstructures of CoCrFeNiMn High Entropy Alloy after High Pressure Torsion at 300 K and 77 K
Phase-field Simulations of Microstructure Evolution under Elastic-plastic Deformation in Nanostructured Materials
Process-mechanics-structure Framework for Surface Severe Plastic Deformation
Production of Nanograined Ge Using Severe Plastic Deformation under High Pressure
Recent Findings in Paradox of Severe Plastic Deformation
Recrystallization during Thermomechanical Consolidation of Nanostructured Metallic and Metal Matrix Nanocomposite Powders
Relationship between Microstructural Parameters Measured by X-Ray, TEM and EBSD
Review of Bake Hardening Mechanisms of Ultra Fine Grained and Coarse Grained Low Carbon Steel Sheets
Revisiting Fatigue Crack Growth in Various Grain Size Regimes of Ni
Roadmap for Tailoring the Strength and Ductility of Ferritic/Martensitic T91 Steel via Thermo-mechanical Treatment
Scaling-up of High-pressure Sliding: Production of High Strength and Superplasticity of Metallic Materials
Sensitization and Corrosion Properties of Sputtered Al-Mg Alloy
Slip Transmission in fcc/fcc Bilayers Using Phase Field Dislocation Dynamics (PFDD)
Solid Hydrocarbon Assisted Reduction: A Novel Approach to Generation of Sub-micron and Nano-metal Particles
SPD of Binary Al-Mg Alloys Pre-processed by Continuous Screw Extrusion
Sputter Deposited Nickel-Molybdenum-Tungsten Thin Films with High Strength and Ductility for Use in Metal MEMS Applications
Strain Hardening and Mechanical Behavior of Gradient Structured AZ31
Stress-assisted Grain Growth in Nanocrystalline Metals Inhibited by Grain Boundary Segregation
Structures and Strength of Gradient Nanostructures
Structure, Texture and Mechanical Properties of Ultrafine Grained Mg-Al-Zn-Mn Alloy after Radial-shift Rolling
Study of Dynamic Recovery in Nanocrystalline Metals Using In-situ X-ray Diffraction and MD Simulations
Study of Sm-Fe Alloy Powders Prepared by Cryomilling in Liquid Nitrogen
Substantially Reduced Elastic Modulus in Nanocrystalline Tantalum Processed by High Pressure Torsion
Synchrotron X-Ray Microbeam Diffraction Measurements of Full Elastic Strain and Stress Tensors in Commercial-Purity Aluminum Processed by Multiple Passes of Equal-Channel Angular Pressing
Synthesis of a Metal Matrix Nanocomposiete through the Application of High-pressure Torsion
Synthesis of UFG Nanotwinned Alloys
The Formation of Growth Twins in Polycrystalline Al with High Stacking Fault Energy
Thermal Stability of Ultra-fine Grained Microstructure of Biomedical Ti-6Al-7Nb Alloy
Tungsten Processed by ECAE
Twinning and Spall of Nanocrystalline Tantalum
Two Different Pathways to Produce Novel Cu-based Nanostructured Alloys with Enhanced Strength and Ductility
Understanding Effects of Dislocation Emissions and Crystallographic Textures on Grain-size Dependent Behavior of Nanocrystalline Metals
Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion
X-10: Microstructural Evolution and Properties of a ZK60 Magnesium Alloy Processed by High-pressure Torsion
X-11: Detailed microstructure investigation of LAE442 magnesium alloy processed by EX-ECAP
X-12: Microstructure Refinement and Strain Hardening of Beta-titanium Alloys Prepared by High Pressure Torsion
X-13: Microstructures and Tensile Properties of Ultrafine Structured Cu-5vol.%Al2O3 Nanocomposites Fabricated by Powder Compact Extrusion at Different Temperatures
X-14: Non-contact CTE Testing of Thin Film Nickel-base Superalloys for Use in High Temperature Metal MEMS Applications
X-15: Simultaneously Enhanced Strength and Ductility and Corrosion Resistance in 316L Stainless Steel with Well Dispersed Nanograins in Microcrystallines Austenite
X-16: The Effect of Grain Structure on the Formation of Nitrided Layers in an Austenitic Stainless Steel
X-1: BNM: Through Science to Innovations
X-2: Characterization of Microstructure and Mechanical Properties of 1350 Aluminium Alloy Processed by Equal-Channel Angular Pressing with Parallel Channels
X-3: Corrosion Behavior of Type 316 SS in 3.5 wt% NaCl Solution under Surface Mechanical Attrition Treatment
X-4: Dynamic Deformation and Failure Mechanisms of Nanocrystalline Titanium Processed by ECAP + Conform
X-5: Effect of Deformation Temperature on Cyclic Loading on 6082 Al Alloy in Strain Controlled Mode
X-6: Excessive Generation of Defects in Nano/Ultrafine Grained Bulk Produced by Shock Wave Consolidation Process and Analysis on the Process through Finite Element Method
X-7: Flame Retardant Polypropylene Nanocomposites
X-8: Influence of Deformation Temperature on Mechanical and Corrosion Behaviour of 6082-Al Alloy
X-9: Mechanical and Microstructural Properties of Commercial Twinning-induced Plasticity (TWIP) Steel Processed by High-pressure Torsion (HPT)

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