Effects of Ag and Zr solutes on dislocation emission from Σ11(332)[110] symmetric tilt grain boundaries in Cu: Bigger is not always better

dc.contributor.author Borovikov, Valery
dc.contributor.author King, Alexander
dc.contributor.author Mendelev, Mikhail
dc.contributor.author King, Alexander
dc.contributor.department Ames Laboratory
dc.contributor.department Materials Science and Engineering
dc.date 2019-09-09T11:15:24.000
dc.date.accessioned 2020-06-29T23:27:39Z
dc.date.available 2020-06-29T23:27:39Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 2018
dc.date.embargo 2020-05-23
dc.date.issued 2018-10-01
dc.description.abstract <p>Solute additions are commonly used to stabilize nanocrystalline materials against grain growth, and can simultaneously enhance the strength of the material by impeding dislocation emission from the grain boundaries. In this study we demonstrate using molecular dynamics (MD) simulations that the effect of solutes on dislocation nucleation depends on the distribution of solutes at the grain boundary, and can vary dramatically depending on the solute type. Solutes with a <em>smaller</em> positive size mismatch to the host can be more effective in suppressing dislocation emission from grain boundaries than others that have <em>larger</em> mismatch. In particular, although Ag solutes have a smaller misfit with Cu than Zr solutes, the effect of Ag on the dislocation nucleation from grain boundaries in Cu can be larger than the corresponding effect of Zr. These findings are relevant to the search for optimal solute additions, which can strengthen a nanocrytalline material by suppressing the nucleation of dislocation slip from grain boundaries, while stabilizing it against grain growth.</p>
dc.description.comments <p>This is a manuscript of the article Borovikov, Valery, Mikhail I. Mendelev, and Alexander H. King. "Effects of Ag and Zr solutes on dislocation emission from Σ11 (332)[110] symmetric tilt grain boundaries in Cu: Bigger is not always better." <em>International Journal of Plasticity</em> 109 (2018): 79-87. DOI: <a href="http://dx.doi.org/10.1016/j.ijplas.2018.05.009" target="_blank">10.1016/j.ijplas.2018.05.009</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ameslab_pubs/429/
dc.identifier.articleid 1432
dc.identifier.contextkey 12225761
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_pubs/429
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/8000
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ameslab_pubs/429/2018_King_EffectsAgZr.pdf|||Sat Jan 15 00:14:19 UTC 2022
dc.source.uri 10.1016/j.ijplas.2018.05.009
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Nanoscience and Nanotechnology
dc.subject.disciplines Structural Materials
dc.subject.keywords Solute segregation at grain boundaries
dc.subject.keywords Dislocation nucleation
dc.subject.keywords Yield stress
dc.subject.keywords Monte Carlo simulation
dc.subject.keywords Molecular dynamics simulation
dc.title Effects of Ag and Zr solutes on dislocation emission from Σ11(332)[110] symmetric tilt grain boundaries in Cu: Bigger is not always better
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
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