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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Coupling Experiments and Modeling to Understand Plasticity and Failure
Presentation Title The Importance of Introducing Probabilistic Information When Modeling the Constitutive Response of Aggregates (Part I)
Author(s) Carlos Tome, Irene Beyerlein
On-Site Speaker (Planned) Carlos Tome
Abstract Scope The macroscopic mechanical response of polycrystals represents the average behavior of very inhomogeneous local behavior and states inside the grains (i.e. stress distributions, dislocations, grain size, twins). As a consequence, models that describe the mechanical response in terms of effective average quantities (i.e. average dislocation density) may be insufficient when inhomogeneities influence the macroscopic response. Experimental techniques, such as neutron and X-ray diffraction, can be used for determining stress fluctuations and dislocation distributions inside grains. Here, we discuss approaches for introducing statistical characterization of microstructure and stress (determined experimentally using Peak Profile Analysis) into grain-scale models. The latter are then implemented into the polycrystal model E-VPSC. This general method constitutes a paradigm for linking length scales. In this first talk, we show that a model for the intra-granular stress distributions inside grains can explain relaxation of internal stress associated with strain holds and Bauschinger effects associated with strain reversals
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Direct Connection between In-situ TEM and Dislocation Simulations
A Domain Decomposition Parallel Implementation of an Elasto-visco-plastic Fast Fourier Transform Micromechanical Solver with Spectral Database Constitutive Representation
A Survey of Several High-energy X-ray Diffraction Studies and Implications for Models of Polycrystal Plasticity
An Image Based Finite Element Model for Ni-based Superalloys Using a Two Scale Constitutive Model Accounting for Morphological Distributions of γ’ Precipitates
Annealing-detwinning due to Thermal Fluctuation of Incoherent Twin Boundary
Challenges with Virtual Sample Instantiation for Prediction of Strain Localization and Crack Initiation in Polycrystalline Ni- and Ti-base Alloys
Characterizing the Effects a Smooth Crystal Lattice Orientation Field Formulation Has on the Evolution of Intragrain Deformation
Comparison of Parameters Required for Computational Models for Modeling Heterogeneous Deformation in Titanium Obtained with Different Approaches
Concurrent Multi-scale Modeling: Towards a Procedure to Test Modeling Hypothesis at the Mesoscale
Continuum Dislocation Dynamics at Finite Deformation and the Path toward Localization and Failure in Metals
Coupled Experiment and Modelling to Study Grain Orientation and Interaction Effects. Part 2
Coupled Experiment and Modelling to Study Grain Orientation and Interaction Effects. Part 1
Coupled Intergranular and Transgranular Fracture Modes in H.C.P. Alloys
Experimental and Computational Analysis of Deformation in Solid Solution and Precipitation Strengthened Ni-Cr-Co Alloys
Facile Measurements of Elastic Constants for Coupling Experiments and Modeling to Understand Plasticity and Failure
Finite Element Simulation of Global Plastic Behavior of Supercritical CO2 Exposed P91 Metal-weld under Tensile Loading
Finite Element Simulation of Limiting Dome Height Test on the Formability of Aluminium Tailor Welded Blanks
Geometrically Necessary Dislocations (GNDs) and Crystal Plasticity in HCP Metals
Grain-scale Investigations of Deformation Heterogeneities in Aluminum Alloys
Improved Understanding of the Portevin–Le Châtelier Effect though Modelling Using Discrete Diffusion Coupled with Discrete Dislocation Dynamics
In-situ Characterization of Microstructural Damage in QP980 Steel
In Situ Mechanics at Atomic Scale – Experimental vs. Computational Molecular Dynamics
Influence of the Aluminum Microstructure in Electronic Components on their Failure Behavior: Experiments and Crystal Plasticity Simulations
Integrated Micromechanical Approaches to Understand Dwell Fatigue: Crystal and Discrete Dislocation Plasticity Modelling
Integrated Micromechanical Approaches to Understand Dwell Fatigue: In-situ Experiments from the Micro-scale Upwards
Integrating High Energy Diffraction Microscopy Data with Crystal Plasticity Models for Strength and Damage
Internal State Variable Plasticity-damage Modeling of AISI 4140 Steel Including Microstructure-property Relations: Temperature and Strain Rate Effects
Investigation of Deformation Mechanisms in Columnar Aluminum
Localized Deformation Fields in Hexagonal Close-packed Polycrystals
Measurements and Crystal Plasticity Simulations of Microstructure-scale Deformation in Tantalum
Mechanical Behavior of Polycrystalline Microscale Silver Pillars
Mechanism-based Modeling of Solute Strengthening: Application to Thermal Creep in Zr Alloy
Microstructure and Texture Evolution during Thermo-mechanical Processing of Low-symmetry Metals
Microstructure Evolution during Biaxial Load Path Changes: In-situ Experiments and Multi-scale FE-FFT Modeling
Microstructure Sensitive Crack Nucleation in PM Ni Alloys
Molecular Dynamics (MD) Evaluation of the Effect of Titanium Oxide Stoichiometry on Fracture
Neighbour Effects on Grain Resolved Stress Distributions in Hexagonal Metals Revealed by 3D X-ray Diffraction Measurements
New Approach for Modeling Texture Effect on Macroscopic Plastic Properties of Metals
New Observations of Phase Transformations during Deformation in Superalloys and High Entropy Alloys: Experiments
New Observations of Phase Transformations during Deformation in Superalloys and High Entropy Alloys: Modeling
On the Role of Casting Pores in the Fatigue Damage Process of a Cast Aluminium Alloy
Opportunities for Validation of Grain-Level Plasticity and Fatigue Crack Growth Using High Energy X-ray Diffraction Microscopy; Part 1: Experimental Methods
Opportunities for Validation of Grain-Level Plasticity and Fatigue Crack Growth Using High Energy X-ray Diffraction Microscopy; Part 2: Modeling Development and Considerations
Plasticity of BCC Metals at Low Temperatures - Coupling Theory with Experiments
Rate Processes in Dislocation Dynamics: Effects on Dislocation Microstructure and Comparison with X-ray and TEM Data
Reliability of Slip Resistance Determination in Hexagonal Materials
Simulating Plasticity and Fracture in Micro-cantilevers
Simulation Study on Plasticity and Fracture in Aluminum Based on Real Microstructures
Strain Bursts Induce Quasi-elastic Non-linear Average Response in Nanopillar Compression
Strain Field Mapping and Modeling Around Laser-induced Keyhole Defects in Ti-7Al Under Cyclic Loading
Study of the Deformation of Mg-Y by In Situ EBSD and Visco-plastic Self-consistent Modeling
The Effect of Temperature on Deformation of CP-Ti
The Importance of Introducing Probabilistic Information When Modeling the Constitutive Response of Aggregates (Part II)
The Importance of Introducing Probabilistic Information When Modeling the Constitutive Response of Aggregates (Part I)
The Influence of Elastic Interactions on Local Stresses and Deformation Mechanism during Tensile Loading of Two-phase Titanium Alloys
Understanding Plastic Deformation in Polycrystals 301L Stainless Steel(301L SS) Using Far Field High Energy Diffraction Microscopy (HEDM) Experiments
Understanding Shear Band Formation Using High-resolution X-ray Diffraction and Numerical Modeling
Understanding the Fatigue Response of Each Crystal within a Copper Aggregate
Using 3D Microstructure Characterization to Study the Mechanics of Polycrystalline Materials
Using Machine Learning Approaches towards Quantifying the Deformation History of Crystals: Examples from Discrete Dislocation Dynamics

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