Elastic interaction-induced anisotropic growth of dislocation loop arrays
| العنوان: | Elastic interaction-induced anisotropic growth of dislocation loop arrays |
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| المؤلفون: | Lei Cao, Yinan Cui, Tengfei Ma, Abigail Hunter, Pranay Chakraborty |
| المصدر: | Journal of Materials Research. 36:3426-3435 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Materials science, Condensed matter physics, Field (physics), Mechanical Engineering, Slip (materials science), Strain hardening exponent, Strain rate, Condensed Matter Physics, Condensed Matter::Materials Science, Mechanics of Materials, Phase (matter), General Materials Science, Deformation (engineering), Dislocation, Anisotropy |
| الوصف: | The elastic interactions and reactions of dislocations lead to the formation of complex dislocation substructures, which is critical to the strain hardening and fatigue failure. Phase field dislocation dynamics simulations are conducted as a first step to understand the elastic interactions between dislocation loops. When the interloop spacing is small, the elastic interactions with neighboring loops become strong, rendering the edge segments strongly pinned, while allowing for the screw segments to propagate more easily. The interactions are found to result in an anisotropic stress distribution around the dislocation loops, leading to the formation of arrays of long, straight edge dislocations that could act as barriers to subsequent slip. Furthermore, the effect of initial loop size and applied strain rate on the elastic interaction-induced anisotropic pinning effect is investigated and discussed. The results are important for coarse-graining dislocation substructures formation into continuum level models of deformation in crystalline solids. |
| تدمد: | 2044-5326 0884-2914 |
| DOI: | 10.1557/s43578-021-00305-3 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::2531409cbc0b76cef28a8c39e02af56b https://doi.org/10.1557/s43578-021-00305-3 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........2531409cbc0b76cef28a8c39e02af56b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20445326 08842914 |
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| DOI: | 10.1557/s43578-021-00305-3 |