Dislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulations
dc.contributor | Virginia Tech | en |
dc.contributor.author | Noronha, S. J. | en |
dc.contributor.author | Farkas, Diana | en |
dc.contributor.department | Materials Science and Engineering (MSE) | en |
dc.date.accessed | 2014-04-23 | en |
dc.date.accessioned | 2014-05-07T15:36:54Z | en |
dc.date.available | 2014-05-07T15:36:54Z | en |
dc.date.issued | 2002-10-01 | en |
dc.description.abstract | We introduce an approach in which results from atomistic simulations are combined with discrete dislocation dynamics simulations of crack-tip plasticity. The method is used to study the effects of dislocation pinning due to grain boundaries or secondary particles on the fracture behavior of aluminum. We find that the fracture resistance is reduced with decreasing pinning distance. The results show that the pinning of the dislocations causes a net decrease in the shear stress projected on the slip plane, preventing further dislocation emission. Semibrittle cleavage occurs after a certain number of dislocations is emitted. | en |
dc.description.sponsorship | Office of Naval Research, Division of Materials Science | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.citation | Noronha, S. J.; Farkas, D., "Dislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulations," Phys. Rev. B 66, 132103 DOI: http://dx.doi.org/10.1103/PhysRevB.66.132103 | en |
dc.identifier.doi | https://doi.org/10.1103/PhysRevB.66.132103 | en |
dc.identifier.issn | 1098-0121 | en |
dc.identifier.uri | http://hdl.handle.net/10919/47827 | en |
dc.identifier.url | http://journals.aps.org/prb/abstract/10.1103/PhysRevB.66.132103 | en |
dc.language.iso | en_US | en |
dc.publisher | American Physical Society | en |
dc.rights | In Copyright | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
dc.subject | To-ductile transition | en |
dc.subject | Crack tip | en |
dc.subject | Nanocrystalline | en |
dc.subject | Instability | en |
dc.subject | Nucleation | en |
dc.subject | Metals | en |
dc.subject | AL | en |
dc.subject | Physics | en |
dc.subject | Condensed matter | en |
dc.title | Dislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulations | en |
dc.title.serial | Physical Review B | en |
dc.type | Article - Refereed | en |
dc.type.dcmitype | Text | en |
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