English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Phase-field modeling of chemoelastic binodal/spinodal relations and solute segregation to defects in binary alloys

Mianroodi, J. R., Shanthraj, P., Svendsen, B., & Raabe, D. (2021). Phase-field modeling of chemoelastic binodal/spinodal relations and solute segregation to defects in binary alloys. Materials, 14(7): 1787. doi:10.3390/ma14071787.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
materials-14-01787-v3.pdf (Publisher version), 2MB
Name:
materials-14-01787-v3.pdf
Description:
Open Access
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2021
Copyright Info:
The Authors

Locators

show

Creators

show
hide
 Creators:
Mianroodi, Jaber Rezaei1, 2, Author           
Shanthraj, Pratheek3, Author           
Svendsen, Bob4, 5, Author           
Raabe, Dierk4, Author           
Affiliations:
1Computational Sustainable Metallurgy, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3243050              
2Theory and Simulation, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863392              
3The School of Materials, The University of Manchester, Manchester M13 9PL, UK, ou_persistent22              
4Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
5Material Mechanics, Faculty of Georesources and Materials Engineering, RWTH Aachen University, Schinkelstraße 2, D-52062 Aachen, Germany, ou_persistent22              

Content

show
hide
Free keywords: Binary alloys; Edge dislocations; Energy storage; Free energy; Grain boundaries; Precipitation (chemical); Screws, Dislocation configurations; Microscopic phase field; Phase field models; Solute concentrations; Solute distribution; Solute interaction; Solute segregation; Thermodynamic forces, Spinodal decomposition
 Abstract: Microscopic phase-field chemomechanics (MPFCM) is employed in the current work to model solute segregation, dislocation-solute interaction, spinodal decomposition, and precipitate formation, at straight dislocations and configurations of these in a model binary solid alloy. In particular, (i) a single static edge dipole, (ii) arrays of static dipoles forming low-angle tilt (edge) and twist (screw) grain boundaries, as well as at (iii) a moving (gliding) edge dipole, are considered. In the first part of the work, MPFCM is formulated for such an alloy. Central here is the MPFCM model for the alloy free energy, which includes chemical, dislocation, and lattice (elastic), contributions. The solute concentration-dependence of the latter due to solute lattice misfit results in a strong elastic influence on the binodal (i.e., coexistence) and spinodal behavior of the alloy. In addition, MPFCM-based modeling of energy storage couples the thermodynamic forces driving (Cottrell and Suzuki) solute segregation, precipitate formation and dislocation glide. As implied by the simulation results for edge dislocation dipoles and their configurations, there is a competition between (i) Cottrell segregation to dislocations resulting in a uniform solute distribution along the line, and (ii) destabilization of this distribution due to low-dimensional spinodal decomposition when the segregated solute content at the line exceeds the spinodal value locally, i.e., at and along the dislocation line. Due to the completely different stress field of the screw dislocation configuration in the twist boundary, the segregated solute distribution is immediately unstable and decomposes into precipitates from the start. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Details

show
hide
Language(s):
 Dates: 2021-04-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.3390/ma14071787
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Materials
  Abbreviation : Materials
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Basel : MDPI
Pages: - Volume / Issue: 14 (7) Sequence Number: 1787 Start / End Page: - Identifier: ISSN: 1996-1944
CoNE: https://pure.mpg.de/cone/journals/resource/1996-1944