Testing Polycrystal Plasticity Models on Observed Lattice Rotations and Dislocation Structures

Grethe Winther

doi:10.4028/www.scientific.net/MSF.495-497.1013

Paper Titles

An Intermediate Viscoplastic Model for Deformation Texture Evolution in Polycrystals
p.989

Reaction Stress Model and Relaxation of Reaction Stress among the Grains during Tensile Deformation of fcc Metals
p.995

Modeling Texture, Twinning and Hardening Evolution during Deformation of Hexagonal Materials
p.1001

A Dislocation Density Based Constitutive Model for Crystal Plasticity FEM
p.1007

Testing Polycrystal Plasticity Models on Observed Lattice Rotations and Dislocation Structures
p.1013

A Combined Finite Element and Self-Consistent Model; Validation by Neutron Diffraction Strain Scanning
p.1019

Experimental Study on the Influence of Grain Boundaries on the Subdivision Behaviour of Al-3%Mg Polycrystals during Cold Deformation Using Electron Backscatter Diffraction
p.1025

Effect of the Strain Reversal on Grain Boundary Character and Substructure Development on a Hot Worked Austenitic Stainless Steel
p.1031

The Role of Texture, Temperature and Strain Rate in the Activity of Deformation Twinning
p.1037

HomeMaterials Science ForumMaterials Science Forum Vols. 495-497Testing Polycrystal Plasticity Models on Observed...

Testing Polycrystal Plasticity Models on Observed Lattice Rotations and Dislocation Structures

Abstract:

This paper combines experimental evidence at the mesoscopic and microscopic levels of the physical slip underlying plastic deformation in an aluminium polycrystal in the evaluation of crystal plasticity models. At the mesoscopic level, lattice rotations of individual bulk grains during deformation have been measured using high-energy synchrotron radation (3DXRD). At the microscopic level, deformation induced dislocation structures have been investigated by transmission electron microscopy. The performance of two different versions of the Taylor model taking different approaches to the ambiguity problem is evaluated.