Predicting gas and shrinkage porosity in solidification microstructure:A coupled three-dimensional cellular automaton model
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第14期
论文作者：Cheng Gu Colin D.Ridgeway Emre Cinkilic Yan Lu Alan A.Luo
文章页码：91 - 105
摘 要：Porosity formation during solidification of aluminum-based alloys, due to hydrogen gas and alloy shrinkage, has been a major issue adversely affecting the performance of solidification products such as castings,welds or additively manufactured components. A three-dimensional cellular automaton（CA） model has been developed, for the first time, to couple the predictions of hydrogen-induced gas porosity and shrinkage porosity during solidification microstructure evolution of a binary Al-Si alloy. The CA simulation results are validated under various cooling rates by porosity measurements in an experimental wedge die casting using X-ray micro computed tomography（XMCT） technique. This validated porosity moel provides a critical link in integrated computation materials engineering（ICME） design and manufacturing of solidification products.
Cheng Gu1，Colin D.Ridgeway1，Emre Cinkilic1，Yan Lu1，Alan A.Luo1,2
1. Department of Materials Science and Engineering, The Ohio State University2. Department of Integrated Systems Engineering, The Ohio State University
摘 要：Porosity formation during solidification of aluminum-based alloys, due to hydrogen gas and alloy shrinkage, has been a major issue adversely affecting the performance of solidification products such as castings,welds or additively manufactured components. A three-dimensional cellular automaton（CA） model has been developed, for the first time, to couple the predictions of hydrogen-induced gas porosity and shrinkage porosity during solidification microstructure evolution of a binary Al-Si alloy. The CA simulation results are validated under various cooling rates by porosity measurements in an experimental wedge die casting using X-ray micro computed tomography（XMCT） technique. This validated porosity moel provides a critical link in integrated computation materials engineering（ICME） design and manufacturing of solidification products.
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