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Title: Graph-component approach to defect identification in large atomistic simulations

Journal Article · · Computational Materials Science

In this work, the graph-theoretical concept of connected components is employed to extract the evolution of defect configurations in a polycrystalline aluminum structure containing ~8.3 million atoms. This graph-component approach is applied to reveal details of defect formation, transport, and transformation in the polycrystalline Al under large shear deformation. Building upon standard nearest neighbor analysis, graph theory and associated tools are used to reduce the multi-million-atom system into discrete component subgraphs that represent distinct structural defects. This method allows the automated identification, characterization, and tracking of defective regions within large volumes of data representing atomic-scale processes. Such analysis elucidates relationships between external stimuli, such as strain, and defect distributions, which have a large influence on material properties. The Graph Analytics for Large Atomistic Simulations (GALAS) codebase that implements this analysis, together with user guidance, is openly available at https://github.com/pnnl/galas.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1886603
Report Number(s):
PNNL-SA-173243
Journal Information:
Computational Materials Science, Journal Name: Computational Materials Science Vol. 214; ISSN 0927-0256
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (43)

Minkowski Tensor Shape Analysis of Cellular, Granular and Porous Structures journal June 2011
Friction stir consolidation of aluminum machining chips journal September 2017
Identify crystal structures by a new paradigm based on graph theory for building materials big data journal June 2019
Shear Assisted Processing and Extrusion (ShAPE™) of AZ91E Flake: A Study of Tooling Features and Processing Effects journal July 2018
High angle boundaries formed by grain subdivision mechanisms journal September 1997
Plastic deformation mechanisms of fcc single crystals at small scales journal December 2011
3D arrangement of atomic polyhedra in tilt grain boundaries journal January 2021
Evolution of solidification defects in deformation of nano-polycrystalline aluminum journal June 2019
Effect of grain structure and strain rate on dynamic recrystallization and deformation behavior: A phase field-crystal plasticity model journal July 2020
Graph theory based approach to characterize self interstitial defect morphology journal July 2021
Effect of loading path on grain misorientation and geometrically necessary dislocation density in polycrystalline aluminum under reciprocating shear journal April 2022
Investigation of iron passivity in highly alkaline media using reactive-force field molecular dynamics journal August 2019
Structural characterization of deformed crystals by analysis of common atomic neighborhood journal September 2007
Shear assisted processing and extrusion of enhanced strength aluminum alloy tubing journal October 2021
Continuum dislocation dynamics-based grain fragmentation modeling journal March 2019
Characterizing complex particle morphologies through shape matching: Descriptors, applications, and algorithms journal July 2011
High speed manufacturing of aluminum alloy 7075 tubing by Shear Assisted Processing and Extrusion (ShAPE) journal November 2021
Graph Networks as a Universal Machine Learning Framework for Molecules and Crystals journal April 2019
Unsupervised Learning Methods for Molecular Simulation Data journal May 2021
Molecular dynamics study of melting and freezing of small Lennard-Jones clusters journal September 1987
Graph dynamical networks for unsupervised learning of atomic scale dynamics in materials journal June 2019
Predicting materials properties without crystal structure: deep representation learning from stoichiometry journal December 2020
A three-dimensional polyhedral unit model for grain boundary structure in fcc metals journal March 2017
Machine learning enabled autonomous microstructural characterization in 3D samples journal January 2020
Efficient and universal characterization of atomic structures through a topological graph order parameter journal March 2022
General formulation of pressure and stress tensor for arbitrary many-body interaction potentials under periodic boundary conditions journal October 2009
Parallel algorithms for hyperdynamics and local hyperdynamics journal August 2020
Molecular dynamics simulations of liquid–liquid interfaces in an electric field: The water–1,2-dichloroethane interface journal October 2020
Machine learning determination of atomic dynamics at grain boundaries journal October 2018
A thermodynamic approach to determine accurate potentials for molecular dynamics simulations: thermoelastic response of aluminum journal June 2009
Structure identification methods for atomistic simulations of crystalline materials journal May 2012
Robust structural identification via polyhedral template matching journal May 2016
Formation and dissociation of shear-induced high-energy dislocations: insight from molecular dynamics simulations journal January 2022
Minkowski tensors of anisotropic spatial structure journal August 2013
BitQT: a graph-based approach to the quality threshold clustering of molecular dynamics journal August 2021
Ab initio study on divacancy binding energies in aluminum and magnesium journal November 2003
Crystal Graph Convolutional Neural Networks for an Accurate and Interpretable Prediction of Material Properties journal April 2018
A (sub)graph isomorphism algorithm for matching large graphs journal October 2004
Microscopic Evidence for Liquid-Liquid Separation in Supersaturated CaCO3 Solutions journal August 2013
Lattice curvature evolution in metal materials on meso- and nanostructural scales of plastic deformation journal October 2013
Characterization of local structures with bond-order parameters and graphs of the nearest neighbors, a comparison journal February 2014
EXAGRAPH: Graph and combinatorial methods for enabling exascale applications journal September 2021
A new method for analyzing the local structures of disordered systems journal October 2011