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- W38919589 abstract "The experimental study of hydrogen porosity formation in aluminum alloys has focused on varying the casting parameters and then observing the effect of these variations on the final structure. This paper will describe a novel technique for the real-time in situ observation of pore formation during solidification and the subsequent development of a mathematical model inspired by the experimental observations. An X-ray temperature gradient stage was used to measure pore nucleation, growth, and morphological changes in the mush zone of aluminum alloys. The results of the experimental study are compared to a calculation of the influence of restricted interdendritic flow. The Darcy flow prediction proved inadequate, therefore a new mathematical model was developed. A model of pore formation limited by hydrogen diffusion and solid phase structure is presented. The nucleation and growth of each individual pore are determined, tracking its impingement on the developing microstructure. The micro-structure is calculated with an analytic equation fitted to a micro-model of cellular and dendritic growth. The diffusion model predicts the experimentally observed trends of pore nucleation and growth." @default.
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- W38919589 date "1995-12-31" @default.
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- W38919589 title "A model of the interaction of porosity and the developing microstructure" @default.
- W38919589 hasPublicationYear "1995" @default.
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