Microstructural modeling of solidification in A356 alloy

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Materials Characterization

DOI:https://doi.org/10.1016/1044-5803(95)00100-X· OSTI ID:131424

Venkataramani, R; Simpson, R; Ravindran, C ^[1]

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1. Ryerson Polytechnic Univ., Toronto, Ontario (Canada). Center for Near-Net Shape Processing of Materials

Macro-micro models assume a constant value for maximum nuclei density, n{sub 0}, to predict the microstructure. This assumption may not be valid for all casting processes and process conditions. In an earlier article, maximum nuclei density was observed to vary with the casting process and pouring temperatures. Here, a macro-micro model was developed to simulate the formation of the primary and eutectic phases in A356 alloy. The castings were simulated using this model with a constant maximum nuclei density (constant n{sub 0}) and with the maximum nuclei density values obtained experimentally (varying n{sub 0}). There was reasonable agreement between simulated and experimental results. Varying n{sub 0} assumption resulted in a close agreement between simulated and experimental grain sizes, relative to constant n{sub 0} assumption. This work brings out the need to determine the maximum nuclei density prior to its usage in macro-micro models.

• OSTI ID: 131424
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 3 Vol. 35; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
DENDRITES
DENSITY
EUTECTICS
GRAIN SIZE
LIQUID METALS
MATHEMATICAL MODELS
MICROSTRUCTURE
PREDICTION EQUATIONS
SIMULATION
SOLIDIFICATION
TEMPERATURE DEPENDENCE