Local stress analysis of partial dislocation interactions with symmetrical-tilt grain boundaries containing E-structural units
| العنوان: | Local stress analysis of partial dislocation interactions with symmetrical-tilt grain boundaries containing E-structural units |
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| المؤلفون: | Huck Beng Chew, Ruizhi Li, Sivasakthya Mohan |
| المصدر: | Philosophical Magazine. 98:2345-2366 |
| بيانات النشر: | Informa UK Limited, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 010302 applied physics, Materials science, Condensed matter physics, Boundary (topology), 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Stress (mechanics), Molecular dynamics, Compressive strength, Tension (geology), 0103 physical sciences, Ultimate tensile strength, Partial dislocations, Grain boundary, 0210 nano-technology |
| الوصف: | Grain boundaries containing porous E-structural units (SUs) are known to readily emit dislocations under tension. Using molecular dynamics simulations, we study the interactions between {111} Shockley partial dislocations and symmetrical-tilt Ni grain boundaries containing E-SUs. We show that the incoming Shockley partials can be accommodated by porous E-SUs along the grain boundary. However, the partial-absorption process disrupts the short-range interactions of incipient dislocations along the boundary, which generates high local tensile and compressive stress regimes emanating from the impingement sites. For the favoured grain boundary comprising only of E-SUs, incipient Shockley partials originating from E-SUs located within the tensile stress regime are subsequently re-emitted into the neighbouring grain. We demonstrate that the critical strength for re-emission of Shockley partials can be delineated into contributions from tensile stress generated by partial-absorption, intrinsic ... |
| تدمد: | 1478-6443 1478-6435 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::72ab137afe05238f53ee43b10ca6032d https://doi.org/10.1080/14786435.2018.1486049 |
| رقم الأكسشن: | edsair.doi...........72ab137afe05238f53ee43b10ca6032d |
| قاعدة البيانات: | OpenAIRE |
PDF full text from Publisher | تدمد: | 14786443 14786435 |
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