Modeling of a Sintering Process at Various Scales
| Autor: | Piotr Kowalczyk, Krzysztof Wawrzyk, Dmytro Lumelskyj, Szymon Nosewicz, Jerzy Rojek, Marcin Maździarz |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Nial Materials science Consolidation (soil) Sintering 02 engineering and technology General Medicine 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Discrete element method Condensed Matter::Materials Science Diffusion process Creep Condensed Matter::Superconductivity Powder metallurgy 0103 physical sciences Composite material 0210 nano-technology computer Engineering(all) computer.programming_language |
| Zdroj: | Procedia Engineering. 177:263-270 |
| ISSN: | 1877-7058 |
| DOI: | 10.1016/j.proeng.2017.02.210 |
| Popis: | This paper presents modeling of a sintering process at various scales. Sintering is a powder metallurgy process consisting in consolidation of powder materials at elevated temperature but below the melting point. Sintering models at the atomistic, microscopic and macroscopic scales have been presented. Sintering is a process governed by diffusion therefore the atomistic modeling using the molecular dynamics has been focused on investigation of the diffusion process. The micromechanical model has been developed within the framework of the discrete element method. It allows us to consider microstructure and its changes during sintering. The macroscopic model is based on the continuum phenomenological approach. It combines elastic, thermal and viscous creep deformation. The methodology to determine macroscopic quantities: stress, strains and constitutive viscous properties from the discrete element simulations has been presented. Possibilities of the developed models have been demonstrated by applying them to simulation of sintering of the intermetallic NiAl powder. Own experimental results have been used to calibrate and validate numerical models. |
| Databáze: | OpenAIRE |
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