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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Computational Methods for Spatio-temporal Scale-bridging: from Atomistics to Mesoscale
Presentation Title Atomistic Modeling of Radiation Damage over Long Timescales
Author(s) Laurent K Beland, Yuri N Osetsky, German D. Samolyuk, Roger E Stoller
On-Site Speaker (Planned) Laurent K Beland
Abstract Scope Molecular dynamics (MD) is routinely used to simulate primary damage formation in materials under ion and neutron irradiation. MD can predict the nature of defects formed by cascades over short timescales, but the evolution of these defects takes place over timescales that well exceed microseconds. The kinetic Activation Relaxation Technique, a variation on adaptive Monte Carlo, is modified to tackle this problem. Technical aspects of the algorithm, including the choice of saddle-search method and the use of active volumes, are discussed. Figure cases where handling the elastic interactions between defects plays a crucial role are presented. Aging of realistic cascade damage in Ni and Ni-alloys, and the diffusion of a broad distribution of defect clusters in these materials are examined. The work was supported as part of the “Energy Dissipation to Defect Evolution”, an Energy Frontier Research Center funded by the U.S. DOE, Office of Science.
Proceedings Inclusion? Planned: A print-only volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Multi-scale Approach to Shearing of Ordered Intermetallic Phase in Multi-phase Alloys: Bridging Ab Initio Calculation and Phase Field Simulation
A Quantized Crystal Plasticity Model for Nanocrystalline Metals: Connecting Atomistic Simulations and Physical Experiments
A Systematic Framework for Predicting Twinning in Hexagonal Close-packed Materials
Accelerating Ring-Polymer Molecular Dynamics Simulation: A Parallel-Replica Dynamics Approach
Anharmonic Flexural Modes in Free-Standing Graphene
Atomistic Modeling at Experimental Strain Rates and Time Scales
Atomistic Modeling of Radiation Damage over Long Timescales
Characterization and Quantification of Crack Tip Plasticity in Crystalline Materials at Experimentally Achievable Strain Rate
Coarse-grained Models for Reducing Complexity in the Description of Crystal Plasticity
Comprehensive Kinetic Characterization of Clusters from the Atomic Scale
Computation of the Lattice Green Function of a Dislocation
Concurrent Atomistic-continuum Simulations of Sequential Slip Transfer of Curved Dislocations across Grain Boundaries
Continuum Modeling of Coherent Reference States in Semicoherent Interfaces
Coupling of Density-Functional Theory with Continuum Methods for Solid/Liquid Interfaces and Electrochemistry
Decohesion Relationships for Hydrogen Induced Grain Boundary Embrittlement in Nickel extracted from Molecular Dynamics Simulations
Defects in Phase-Field Crystal Models: Comparison to Molecular Dynamics
Density-functional Embedding Theory: An Effective Way to Perform Multi-scale Quantum Mechanics Simulations of Materials
Development of Accelerated Reactive Molecular Dynamics Framework for Chemically Reactive Systems
Embedding a Microstructure Model in a Macro-scale Solidification Model
Evaluation of Strain Localizations on AA-7050 Using CP-FFT and EBSD
From Nanosecond to Second: Following Long-time Off-lattice Atomistic Dynamics with the Kinetic Activation-relaxation Technique
Further Development of the Local Hyperdynamics Method for Accelerated Molecular Dynamics
Generating Reactive Force Fields: From Universal but Challenging to Special but Simple
I-1: Study of the Structure and Deformation Pathways of Ti-7Al Using Atomistic Simulations, Experiments and Characterization
Improved Twinning Simulation by Linking Meso-scale Full-field FFT Approach with Macro-scale Effective Medium VPSC Model
Increasing the Power of Accelerated Molecular Dynamics Methods
Large-scale Real-space Electronic Structure Calculations
Modeling Solidification, Grain Growth, and Phase Transformation by A Modified Two-Mode Phase-Field Crystal Model
Multiscale Diffusion Method for Simulations of Long-Time Defect Evolution with Application to Dislocation Climb
Multiscale Model for Interlayer Dislocations in Bilayer Material
Multiscale Quantum/Atomistic Coupling Using Constrained Density Functional Theory
Parameterization of the Structural Phase Field Crystal Model for the Simulation of Grain Boundary Structures and Energies
Peierls Potential and Kink Pair Mechanism in High Pressure MgSiO3 Perovskite
Quantum Dynamics of Atomic Motion in Beryllium
Quasiparticle Approach to Diffusional Atomic Scale Self-Assembly of Complex Structures
Recent Advances and Ongoing Challenges in Phase Field Crystal Modeling
Scale-Bridging Modeling of Helium Segregation to Surfaces of Plasma-Exposed Tungsten
Sublattice Parallel Replica Dynamics
The Strength and Deformation Behavior of Nickel Based Superalloy Microcrystals through Discrete Dislocation Dynamics Simulations
Towards Real-time Multi Scale Modeling
Understanding Hydrophobicity Trends in Mixed F/H Terminated C(111) Surfaces through DFT and Classical Point-Charge Force Fields
Using Speculative Parallelization to Enhance Temperature Accelerated Dynamics Simulations

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