High temperature dislocation processes in precipitation hardened crystals investigated by a 3D discrete dislocation dynamics

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00480710" target="_blank" >RIV/68081723:_____/17:00480710 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijplas.2017.04.017" target="_blank" >http://dx.doi.org/10.1016/j.ijplas.2017.04.017</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijplas.2017.04.017" target="_blank" >10.1016/j.ijplas.2017.04.017</a>

Result language
angličtina
Original language name
High temperature dislocation processes in precipitation hardened crystals investigated by a 3D discrete dislocation dynamics
Original language description
3D discrete dislocation dynamics is employed to investigate motion of general mixedndislocation segments subjected to high temperature loadings in microstructures withnimpenetrable particles. The implementations of the model first address several benchmarknprocesses including shrinkage of a glissile dislocation loop driven by self-stresses and annannihilation of mutually interacting co-axial prismatic dislocation loops. In particular, wenshow that models of the microstructure with planar and/or translational symmetrynimprove efficiency, speed and stability of the calculations. Our simulations then focus onnmigration of low angle dislocation boundaries in an array of particles while taking intonaccount all mutual dislocation-dislocation interactions and the action of an externallynapplied stress. The results show for the first time that the migration of tilt dislocationnboundaries in crystals with particles can be associated with threshold stresses. Thencalculated thresholds are in a good agreement with experimental threshold stresses thatncharacterize creep behaviour of precipitation hardened alloys.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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