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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Deformation and Transitions at Grain Boundaries VII
Sponsorship TMS Materials Processing and Manufacturing Division
TMS: Computational Materials Science and Engineering Committee
Organizer(s) Saryu Jindal Fensin, Los Alamos National Laboratory
Thomas R. Bieler, Michigan State University
Shen J. Dillon, University of Illinois
Douglas E. Spearot, University of Florida
Jian Luo, University of California, San Diego
Jennifer LW Carter, Case Western Reserve University
Scope It is well established that grain boundaries are nucleation sites for dislocations, twins, and phase transformations. Deformation at the microstructural scale is heterogeneous, due to differences in elastic properties and deformation resistance of specific grain boundaries with respect to an externally applied stress. This can lead to differences in strain accumulation, cause structural changes and transformations within the boundary, and generate gradients in neighboring grains. Due to these effects, the local stress and strain tensors can differ significantly from globally imposed stress states.

This symposium will examine how heterogeneous strains and transformations originating from grain boundaries can be characterized, analyzed, modeled, and used to account for and ultimately predict continuum scale properties, involving all aspects of material production and service, from initial solidification or consolidation to crack or void nucleation, and the processes by which damage coalescence becomes large enough to be modeled with continuum modeling strategies.

Topics anticipated include, but are not limited to:
• Characterization of heterogeneous strains due to grain or phase boundaries
• Atomistic modeling of deformation that includes grain or phase boundaries
• Boundaries as dislocation or partial dislocation sources and sinks
• Slip transfer/slip penetration and deformation details at interfaces
• Meso-scale modeling of ensembles of grains
• Crystal plasticity and/or transformation modeling
• Damage and crack nucleation at grain or phase boundaries
• Influence of grain boundary structure or character on microstructure evolution
• Concurrent dislocation generation and recovery processes at grain boundaries
• Influence of grain boundary precipitates on plasticity and phase transformations
• Coupling between the local grain boundary structure and other properties of materials
• The composition, structure, stability and transition of grain boundary complexion (a.k.a., 2-D interfacial “phase”)
• Influence of alloy or impurity atoms on localized boundary deformation
• Formation of boundaries during deformation such as cell-wall structure, GNBs, IDBs, cell-block boundaries, etc.
Abstracts Due 07/15/2019
Proceedings Plan Planned: Supplemental Proceedings volume
PRESENTATIONS APPROVED FOR THIS SYMPOSIUM INCLUDE

A Crystal-plasticity Modeling Framework to Study Effect of Grain Size on Mechanical Response of Open-cell Aluminum Foam
A Crystal Plasticity Model with Enhanced Interface Physics
A Multiphysics, Mesoscale Framework to Predict the Creep-fatigue Life of Engineering Polycrystalline Alloys
A New Approach to Modeling Grain Boundary Motion with Strongly Anisotropic Boundary Energy
Ab Initio Study of a Highly Asymmetric Grain Boundary Superstructure in WC
Adsorption and Equilibrium Metal-ceramic Orientation Relationships
An Atomistic Survey of Grain Boundary Migration Mechanisms in BCC Fe
Anisotropic Mobility in Faceted Σ11 <110> tilt FCC Grain Boundaries and the Effect of Subsequent Doping
Anisotropy Grading Effects on Strength and Ductility
Atomic Scale Modeling of Microstructure Effects on the Nucleation, Growth of Voids During Spall Failure of Nanocrystalline Ta
Atomic Simulations on Properties of Twinning Dislocations in Copper
Atomistic Modeling of Effects of Alloy Element and Impurity Segregation on Grain Boundary Embrittlement in BCC Fe
Atomistic Simulations of Grain Boundary-dislocation Interactions in Mg and Mg Alloys
Bridging the Gap Between Grain Boundary Experiments and Simulations via Engineered Oligocrystals
Characterization and Modeling of the Microstructure-scale Strain Distributions in an Aluminum Alloy Under Multiple Strain Paths
Characterization of Strain at Twin Boundaries in Ni-base Superalloys via Dark Field X-ray Microscopy
Coarsening of Ferrite Lamellae Grains in Heavily Cold Drawn Pure Iron Wire
Continuum Dislocation Dynamics at Finite Deformation: Computational Modeling and Preliminary Results
Critical Assessment of Grain Boundary Role on the Magnetic Flux Trapping in Niobium
Database and Predictive Model of Grain Boundary Properties of Elemental Metals
Deformation Nanomechanics and Dislocation Quantification at Atomic Scale in Nanocrystalline Pure-metal Magnesium
Disconnection Mediated Grain Boundary Migration
Dislocation Density Distribution at Slip Band-grain Boundary Intersections
Dislocation Interactions and the Formation of Low-angle Grain Boundary
Effect of Silica and Rare Earth Oxides on the Grain Boundary Chemistries in Hot-pressed Boron suboxide (B6O) and the Observance of Nanolayer Films
Estimation of Misfit Dislocation Density in Hexagonal Titanium Using Microbeam X-Ray Diffraction and the Frank Bilby Equation
Evolution of Grain Boundary’s Metastability in Metallic Nanocrystals Under External Stimuli
Fatigue-crack Healing in Pure Nanocrystalline Pt Enabled by Boundary Evolution
Fatigue-induced Slip from Type II Twin Boundary Motion of Shape Memory Alloys
Grain Boundary Sliding and Slip Transmission in High Purity Aluminum
Grain Boundary Spinodals: The Role of the Interface Stiffness in Grain Boundary Dynamical Processes
In-situ Investigation of Intergranular Crack Initiation in Hydrogen Embrittled Inconel 725
Influence of Crystal Orientation and Berkovich Tip Rotation on the Mechanical Characterization of Grain Boundaries in Molybdenum
Inhibiting Twin Transfer in Magnesium Alloys with Grain Boundary Particles
Interactions Between Slip Bands and Grain Boundaries in Ti-6Al-4V
Interplay of Chemistry and Faceting at Grain Boundaries in an Al-alloy
Interrelationship Between How Grain Boundary Solute Segregation Influence Grain Coarsening, Initiation of Phase Transformations, and Impact Deformation Mechanisms of Metallic Alloys
Investigation of Dislocation Interactions in a Bicrystalline Micropillar Through an Atomistically-informed Discrete Dislocation Dynamics Model
Investigation of Grain Boundary and Dislocation Interactions Through In-situ TEM MEMS-based Tensile Nanomechanical Testing of Ultrafine Grained Gold Thin Films
Manipulating Twin Morphology in Mg Alloys by Varying Solute Concentration
Mechanistic Transitions Underpinning Grain Boundary Segregation Strengthening in Nanocrystalline Alloys
Microstructural Predictions of Thermo-mechanical Fracture of Hydrided HCP Alloys
Modeling Growth of Voids in Various Grain Neighborhoods Using Crystal Plasticity Theory
Multiscale Simulation of the Dislocation-interface Reactions: Methodology, Mechanisms, and Applications
On the Effect of Slip Transfer and Grain Boundary Sliding on the Deformation Mechanisms of FCC Polycrystals
Phase Transitions in Grain Boundary Dynamics
Pinning of a Grain Boundary Migration by Coherent Second Phase Particles
Predictions of Grain Boundary Segregation in bcc Refractory Metals based on Electronic Descriptors
Quantifying and Predicting a "local" Stacking Fault Energy in Multi-principal Element Alloys
Quantifying the Plastic Deformation Behavior of Grain Boundaries in Additive Manufactured Ta
Relationship Between Microstructure and Mechanical Properties of Super Duplex Stainless Steel
Roughening and Screening Transitions in Grain Boundaries: A Disconnection-based Monte Carlo Simulation Approach
Screw Dislocation Transmission Across the Σ3{112} Twin Boundary in Face Centered Cubic Copper
Simulating Grain Boundary Structures with DFT Accuracy Through Active Learning of Interatomic Potentials
Slip bands in Ni-base Superalloys: A Crystal Plasticity Study Informed by Digital Image Correlation
Strain Localization and Martensitic Transformations at Shear Bands in a Low Stacking Fault Energy Austenitic Stainless Steel
Stress Induced Fracture Transition in High-temperature 9%Cr-CrMoV Dissimilar Welded Joint
Stress State Dependence of Basal-prismatic Facet Structures in Mg
Structure and Kinetics of Three-dimensional Defects on the {10-12} Twin Boundary in Magnesium: Atomistic and Phase-field Simulations
Structure, Deformation Response and Diffusion in Random [110] Tilt Grain Boundaries in FCC Alloys
Study on Effect of Symmetric Tilt Grain Boundaries on Twin Nucleation in Ti
The Chemical Effect on the Potential Energy Landscape of Grain Boundary
The Evolution of Interfacial States in Nanocrystalline Al-Ni-Ce and their Influence on Mechanical Behavior and Thermal Stability
The Role of Microstructure and Loading Parameters on Deformation Twinning in Nanocrystalline Mg at High Strain Rates
Thick Amorphous Complexions Enabled by Compositional and Thermal Manipulation
Twinning Nucleation Process at Grain Boundary in BCC Crystals
Understanding Fracture Initiation Under Bending Conditions in AA6451 Using a Multiscale and Multimodal Electron Microscopy Approach
Understanding the Evolution of Defects Under Extreme Conditions in BCC Tantalum
Unusual Size Effects from Tilted Twin Boundaries in Nano-twinned Metals
Vacancy-mediated Solute/Twin Boundary Interactions in HCP Alloys


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