Towards the distribution of a class of polycrystalline materials with an equilibrium defect structure by grain diameters: Temperature behavior of the yield strength
| Источник: | AIP Conference Proceedings.— : AIP Publishing Vol. 2899, iss. 1 : Physical Mesomechanics of Condensed Matter: Physical Principles of Multiscale Structure Formation and the Mechanisms of Nonlinear Behavior (MESO 2022).— 2023.— Article number 020122, 8 p. |
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| Примечания: | Title screen We modify a theory of flow stress introduced in [6,7,8] for a class of polycrystalline materials with equilibrium and quasy-equilibrium defect structure under quasi-static plastic deformations. We suggest Maxwell-like distribution law for defects (within dislocation-disclination mechanism) in the grains of polycrystalline samples with respect to grain’s diameter. Polycrystalline aggregates are considered within single-and two-phase models that correspond by the presence of crystalline and grain-boundary (porous) phases. The scalar dislocation density is derived. Analytic and graphic forms of the generalized Hall–Petch relations for yield strength are produced for single-mode samples with BCC (a-Fe), FCC (Cu, Al, Ni) and HCP (a-Ti, Zr) crystal lattices at T=300 K with different values of the grain-boundary phase. We derived new form of the temperature-dimensional effect. The values of extremal grain and maximum of yield strength are decreased with raising the temperature in accordance with experiments up to UFG region Текстовый файл AM_Agreement |
| Язык: | английский |
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2023
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| Online-ссылка: | https://doi.org/10.1063/5.0162982 |
| Формат: | Электронный ресурс Статья |
| Запись в KOHA: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=672531 |