Microstructure-based numerical simulation of reversible phase transformations in metal-matrix composites
A model of reversible phase transformation in metal-matrix composites is developed. Nitinol (TiNi) and boron carbide (B4C) are used as matrix and particle materials, respectively. Irregular shape of the ceramic particle is taken into account explicitly. Isotropic elastic-plastic formulation is devel...
| Published in: | AIP Conference Proceedings Vol. 2509. P. 020069-1-020069-4 |
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| Main Author: | |
| Other Authors: | , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000927731 Перейти в каталог НБ ТГУ |
| Summary: | A model of reversible phase transformation in metal-matrix composites is developed. Nitinol (TiNi) and boron carbide (B4C) are used as matrix and particle materials, respectively. Irregular shape of the ceramic particle is taken into account explicitly. Isotropic elastic-plastic formulation is developed to describe local phase transformations in the matrix. Using the experimentally observed flow curves the threshold strain and stress values are assigned to transfer the matrix material local regions from one phase state to another, and vice versa, by changing their elastic moduli. The constitutive model is implemented to Abaqus/Standard software using user-defined UMAT subroutine. Quasi-static tension followed by compression of the composite material is simulated by the full 3D finite-element method. Phase transformation is shown to nucleate in the stress concentration regions of the matrix located near the curvilinear interface between the matrix and particle. The influence of the phase transformation and plastic strain localization in the matrix on the homogenized macroscopic response of the composite is analyzed. |
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| Bibliography: | Библиогр.: 14 назв. |
| ISSN: | 0094-243X |