Predicting gas and shrinkage porosity in solidification microstructure: A coupled three-dimensional cellular automaton model. (15th July 2020)

• Record Type: Journal Article
• Authors: Gu, Cheng; Ridgeway, Colin D.; Cinkilic, Emre; Lu, Yan; Luo, Alan A.
• Is Part Of: Journal of materials science & technology. Volume 49(2020)
• Page Start: 91
• Page End: 105
• Publication Date: 2020-07-15
• Subjects: Solidification -- Cellular automaton -- Microstructure simulation -- Microporosity evolution; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2020.02.028
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: 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.