Multiscale Phenomena in Materials: Experiments and Modeling : Symposium Held November 30-December 2, 1999, Boston, Massachusetts, U.S.A

by Robertson, Ian M.; Lassila, D. H.; Devincre, B.; Phillips, R.

• ISBN13: 9781558994867
• ISBN10: 1558994866
• Format: Hardcover
• Copyright: 2000-04-01
• Publisher: Cambridge Univ Pr

Summary

There has been increasing interest in using what are termed 'multiscale modeling' approaches to understand the effects of composition and microstructure on mechanical behavior. It is now quite common to find publications that report on related phenomena using atomistic, microscale (dislocation dynamics) and mesoscale/continuum computer simulations. With this enhanced interest in multiscale phenomena emerges a need for experimental work that validates and challenges the predictive capabilities of modeling and simulations. This book brings together experimentalists and modelers working in common areas of interest, to exchange information and lead to more tightly coupled experimental and modeling work. Topics include: plasticity at the continuum length scale; nonlocal plastic theory and dislocation phenomena; dislocation dynamics - experiments and simulation; dislocation core properties and effects; fracture and crack propagation; dislocation interactions with interfaces and grain boundaries; and microstructural modeling for industrial metals processing.

Table of Contents

Preface	p. xiii
Acknowledgments	p. xv
Materials Research Society Symposium Proceedings	p. xvi
Plasticity at the Continuum Length Scale
Symmetry Investigation of Textured Polycrystal Properties	p. 3
Strain Tensors at the Atomic Scale	p. 15
Experimental Study of Mobile Dislocation Densities and Velocities Through Transient Mechanical Tests	p. 21
Finite Element Simulations of the Deformation of bcc Aggregates Using a Crystal Plasticity Model--Local Orientation Effects	p. 27
The Effect of Material Inhomogeneity on Serrated Plastic Flows	p. 33
A Model for Calculating Substrate Curvature During Coalescence of Pt Islands on an Amorphous Substrate	p. 39
The Determination of Evolving Microstructure Using Constitutive Relationships	p. 45
Non-Local Plastic Theory and Dislocation Phenomena
The Strain Gradient Effects in Micro-Indentation Hardness Experiments	p. 53
Effect of Precipitate Morphologyon the Gradient-Dependent Behavior of Two-Phase Single Crystals	p. 59
Experimental Analysis and Crystallographic Model of Plastic Deformation After a Change of Loading Path in Milk Steel Polycrystals	p. 67
Complementary Experimental Techniques for Multi-Scale Modeling of Plasticity	p. 73
Dislocations and Internal Stresses in Thin Films: A Discrete-Continuum Simulation	p. 87
Synchroshear Versus Conventional Shear Mechanisms in Transition-Metal Disilicides with the C40 Structure	p. 93
Atomic-Scale Design for Enhanced Low-Temperature Twinning in ZrCr[subscript 2]-Based Laves Phases	p. 99
Stochastic Mesoscale Modeling of Elastic-Plastic Deformation	p. 105
Dislocation Dynamics--Experiments and Simulation
In Situ TEM Deformation Studies of Dislocation Generation and Motion in High-Purity Mo Single Crystals	p. 113
Dislocation Multiplication in the Early Stage of Deformation in Mo Single Crystals	p. 119
Dislocation Forest Interactions: Simulation and Prediction	p. 125
Forest Hardening and Boundary Conditions in 2-D Simulations of Dislocations Dynamics	p. 131
Discrete Dislocation Plasticity Approach to Fast Moving Dislocations	p. 137
Simulation of Dislocation Dynamics in Ni[subscript 3]Al: A Study of Velocity Autocorrelations	p. 143
Modeling Collective Dislocation Dynamics in Ice Single Crystals	p. 149
The Energetics of Dislocation-Obstacle Interactions by 3-D Quasicontinuum Simulations	p. 155
Amplitude Dependent Internal Friction Within a Continuum Simulation	p. 161
Dislocation Core Properties and Effects
Dislocation Structure and Deformation Behavior of Intermetallic Compounds	p. 169
Mechanical Loss Associated With Stress Anomaly in Ni[subscript 3]Al and Ni[subscript 3](Al,Ta) Single Crystals	p. 181
Properties of the Deformation Microstructure in Al-Rich [gamma]-TiAl Deformed by Ordinary Dislocations	p. 187
Deformation of Al-Rich [gamma]-TiAl by [001] Dislocations Over the Domain of Flow Stress Anomaly	p. 193
Study of the Mechanical Behavior of bcc Transition Metals Using Bond-Order Potentials	p. 199
Transition Temperatures in Plastic Yielding and Fracture of Semiconductors	p. 205
Atomic-Scale Modeling of the Annihilation of Jogged Screw Dislocation Dipoles	p. 217
Structure of a Dissociated Edge Dislocation in Copper	p. 223
Atomistic Simulation of Transonic Dislocations	p. 229
Different Relaxation Modes of Epitaxial Thin Film Alloys With a Large Size Effect	p. 235
Computer Simulation of the Effect of Copper on Defect Production and Damage Evolution in Ferritic Steels	p. 243
Dislocation Mobility in Two-Dimensional Lennard-Jones Material	p. 249
Study of Electrical Properties of Dislocations in ZnS Using Electric Force Microscopy	p. 255
Atomistic Simulation and Experimental Investigation of Ultra Precision Cutting Processes	p. 261
Surface Relaxations of Aluminum Simulated by Bond Order Potentials	p. 267
Modeling of the Dislocation Formation at Pores and Inclusions Under Thermo-Mechanical Shear Loads	p. 273
Single Crystal Elastic Moduli of Disordered Cubic Alloys	p. 279
A Systematic Investigation of Strain Relaxation, Surface Morphology and Defects in Tensile and Compressive InGaAs/InP Layers	p. 285
Fracture and Crack Propagation
A Discrete Dislocation Analysis of Crack Growth Under Cyclic Loading	p. 293
X-ray Microbeam Diffraction Mapping of Different Texture Scales Important in Fatigue Cracking or in Large Deformations	p. 303
A Multiple Slip Plane Model for Crack-Tip Plasticity	p. 309
Damage and Crack Propagation at a Microstructural Scale	p. 315
Crack Propagation in Freshwater and Saline Ice	p. 321
Void Shape and Distribution Effects on Coalescence in Elastic-Plastic Solids	p. 327
Atomistic Modeling of Void Growth and Coalescence in Ni+H	p. 333
Microstructurally Induced Ductile Deformation Mechanisms and Grain-Boundary Effects in Polycrystalline Aggregates	p. 339
A Partitioned-Problem Approach to Microstructural Modeling of a Glass-Ceramic	p. 345
Long Distance Fracture Surface Roughness on a Dendritic Aluminum Alloy	p. 351
Self-Affine Measurements on the Fracture Surface of Plastic Materials by AFM	p. 357
Self-Affine Fractal Characterization of a TNT Fracture Surface	p. 363
Dislocation Interactions With Interfaces and Grain Boundaries
The Structure of Defects Formed by Absorption of Crystal Dislocations in Interfaces in the HCP Metals	p. 371
Dislocation Interactions With Lamellar Grain Boundaries in Titanium Aluminum Intermetallics	p. 383
Atomistic Simulations of Dislocation-Interface Interactions in the Cu-Ni Multilayer System	p. 389
Identification of 2-D Boundaries From 3-D Atom Probe Data, and Spatial Correlation of Atomic Distributions With Interfaces	p. 395
Atomistic Modeling of Interfacial Diffusion in the Lamellar L1[subscript 0] TiAl	p. 401
Structure and Stability of Grain Boundaries in Molybdenum With Segregated Carbon Impurities	p. 405
Influence of Grain Boundary Structure on Liquid Metal Penetration Behavior	p. 411
Twinning Deformation in Martensite Microstructure	p. 417
Microstructural Modeling for Industrial Metals Processing
Modeling of Grain Refinement in Aluminum Alloys	p. 425
A Model for Predicting Weld Metal Grain Refinement in G-V Space	p. 431
Crystallographic Texture and Yield Behavior of Al-Cu-Li (2195) Plate	p. 439
Influence of Grain Size on Recrystallization During Hot Working of Austenitic Stainless Steels	p. 445
The Cellular Automation Simulation of Microstructural Evolution During Deformation Processing of Metals	p. 457
Modeling the Effect of Noise on Multiscale Dislocation Cell Structures	p. 469
Thixotropy of Semisolid Metals	p. 475
Characterization and Modeling of Precipitation Kinetics in Aluminium 7000 Alloys	p. 481
Author Index	p. 487
Subject Index	p. 489
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