Modelling flow-induced microstructural segregation in semi-solid metals
نویسندگان
چکیده
Lightweight alloys produced by pressurized castings suffer from flow-induced microstructural segregation due to the migration of externally solidified crystals (ESCs). Although some qualitative research has been carried out on ESCs migration, quantitative prediction it is still demanded. In this respect, an model based hydrodynamics and rheological behaviour semi-solid metals (SSMs) proposed estimate segregation. By employing model, a plug flow region having decisive influence observed according simulation yield-pseudoplastic SSMs. Good agreement between experimental data results obtained, suggesting that such controllable manipulating process parameters as solid fraction, cavity size filling velocity. A real-time in situ synchrotron X-ray radiography experiment reveal nature provide evidence for hypothesized mechanism. semi-empirical fraction-related (SFR) capable relating with fraction SSMs also proposed, enabling optimization parameters.
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ژورنال
عنوان ژورنال: Materials & Design
سال: 2022
ISSN: ['1873-4197', '0264-1275']
DOI: https://doi.org/10.1016/j.matdes.2021.110364