skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of loading path on grain misorientation and geometrically necessary dislocation density in polycrystalline aluminum under reciprocating shear

Journal Article · · Computational Materials Science
 [1];  [1];  [1];  [1];  [2]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  2. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Colorado School of Mines, Golden, CO (United States)

Solid phase processing (SPP) is a promising alloy fabrication technique to produce fine and homogeneous grain structures for high-performance alloys. However, there is very limited modeling capability to understand and predict the grain refinement during SPP. In this work, the crystal plasticity theory was used to study elastic-plastic deformation in polycrystalline aluminums under large shear deformation. Two approaches, kernel averaged misorientation (KAM) and grain reference orientation deviation (GROD), were used to assess the grain misorientations. The geometrically necessary dislocation (GND) density was computed with the plastic strain rate. The deformation simulations were carried out under two loading conditions to investigate the effect of loading paths on the evolutions of grain misorientation and GND density. The results show that the regions with high misorientation and GND density first appear near grain boundaries. These regions then extend toward interior grains. The loading path affects dislocation system activation and dislocation recovery, hence dislocation evolution and misorientation. In conclusion, both two- and three-dimensional simulations showed that the spatial and temporal evolutions of GROD, KAM, and GND density in are closely correlated, which indicates they all can be used as criteria of grain refinement or recrystallization.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2310938
Alternate ID(s):
OSTI ID: 1862578
Report Number(s):
PNNL-SA-163073
Journal Information:
Computational Materials Science, Vol. 205; ISSN 0927-0256
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (37)

SciPy 1.0: fundamental algorithms for scientific computing in Python journal February 2020
Consistent determination of geometrically necessary dislocation density from simulations and experiments journal October 2018
Extreme shear-deformation-induced modification of defect structures and hierarchical microstructure in an Al–Si alloy journal November 2020
Effect of grain structure and strain rate on dynamic recrystallization and deformation behavior: A phase field-crystal plasticity model journal July 2020
Using local GND density to study SCC initiation journal October 2020
An integrated full-field model of concurrent plastic deformation and microstructure evolution: Application to 3D simulation of dynamic recrystallization in polycrystalline copper journal May 2016
Data Structures for Statistical Computing in Python conference January 2010
High ductility aluminum alloy made from powder by friction extrusion journal June 2019
Latent Hardening in Single Crystals II. Analytical Characterization and Predictions journal October 1991
Experimental parameters influencing grain refinement and microstructural evolution during high-pressure torsion journal February 2003
Ultrafine-grained Al-Mg-Zr alloy processed by shear-assisted extrusion with high thermal stability journal September 2020
Microstructural Modification of Cast Aluminum Alloys via Friction Stir Processing journal August 2003
Magnesium alloy ZK60 tubing made by Shear Assisted Processing and Extrusion (ShAPE) journal May 2019
Friction Consolidation of MA956 powder journal November 2013
Multi-phase-field simulations for dynamic recrystallization journal June 2009
A spectral method solution to crystal elasto-viscoplasticity at finite strains journal July 2013
An integrated fast Fourier transform-based phase-field and crystal plasticity approach to model recrystallization of three dimensional polycrystals journal March 2015
Friction stir welding and processing journal August 2005
Diffraction-based misorientation mapping: A continuum mechanics description journal December 2019
High-pressure torsion of pure metals: Influence of atomic bond parameters and stacking fault energy on grain size and correlation with hardness journal October 2011
Influence of crystal structure on size dependent deformation behavior and strain heterogeneity in micro-scale deformation journal July 2019
Dispersoid Distribution and Microstructure in Fe-Cr-Al Ferritic Oxide Dispersion-Strengthened Alloy Prepared by Friction Consolidation journal July 2015
Overview of constitutive laws, kinematics, homogenization and multiscale methods in crystal plasticity finite-element modeling: Theory, experiments, applications journal February 2010
An efficient and robust approach to determine material parameters of crystal plasticity constitutive laws from macro-scale stress–strain curves journal November 2020
A three-scale crystal plasticity model accounting for grain refinement in fcc metals subjected to severe plastic deformations journal March 2016
Array programming with NumPy journal September 2020
Continuum dislocation dynamics-based grain fragmentation modeling journal March 2019
A three-dimensional cellular automata-crystal plasticity finite element model for predicting the multiscale interaction among heterogeneous deformation, DRX microstructural evolution and mechanical responses in titanium alloys journal December 2016
Large creep formability and strength–ductility synergy enabled by engineering dislocations in aluminum alloys journal November 2020
Phase field modeling of discontinuous dynamic recrystallization in hot deformation of magnesium alloys journal October 2020
A model of grain fragmentation based on lattice curvature journal March 2010
Phase transformations, microstructural refinement and defect evolution mechanisms in Al-Si alloys under non-hydrostatic diamond anvil cell compression journal March 2021
Lattice misorientation evolution and grain refinement in Al-Si alloys under high-strain shear deformation journal August 2021
Some geometrical relations in dislocated crystals journal March 1953
Multiscale modeling of hot-working with dynamic recrystallization by coupling microstructure evolution and macroscopic mechanical behavior journal January 2014
Dislocation density distribution around an indent in single-crystalline nickel: Comparing nonlocal crystal plasticity finite-element predictions with experiments journal June 2014
DAMASK – The Düsseldorf Advanced Material Simulation Kit for modeling multi-physics crystal plasticity, thermal, and damage phenomena from the single crystal up to the component scale journal February 2019

Similar Records

Investigation of the shear response and geometrically necessary dislocation densities in shear localization in high-purity titanium
Journal Article · Fri Mar 31 00:00:00 EDT 2017 · International Journal of Plasticity · OSTI ID:2310938

Resolving the geometrically necessary dislocation content in severely deformed aluminum by transmission Kikuchi diffraction
Journal Article · Fri Jun 15 00:00:00 EDT 2018 · Materials Characterization · OSTI ID:2310938

An investigation of geometrically necessary dislocations and back stress in large grained tantalum via EBSD and CPFEM
Journal Article · Mon Nov 18 00:00:00 EST 2019 · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing · OSTI ID:2310938