Book chapter
Real‐Time Radiography and Modeling of Porosity Formation in an A356 Aluminum Alloy Wedge Casting
Shape Casting: 6th International Symposium, pp.35-42
John Wiley & Sons, Inc
02/10/2016
DOI: 10.1002/9781119274865.ch5
Abstract
The formation of shrinkage porosity in a wedge ‐shaped A356 aluminum casting is observed in real‐time using video radiography. From this observation, an image‐processing technique is developed to quantify the through‐thickness average porosity distribution in the casting as a function of time. The solidification and cooling of the casting are simulated in order to obtain the temperature and solid‐fraction fields. It is found that once the wedege becomes isolated from the in gate, surface sinks develop until the solid‐fraction at the sinking location reaches approximately 45%. Subsequently, internal porosity starts forming in the upper part of the wedge. This interdendritic porosity spreads over the region with the lowest solid‐fraction and continually increases until the casting is fully solidified. The maximum porosity percentage is measured in the thermal center of the wedge. A computational model is proposed to predict the evolution of the porosity in the aluminum casting.
Details
- Title: Subtitle
- Real‐Time Radiography and Modeling of Porosity Formation in an A356 Aluminum Alloy Wedge Casting
- Creators
- Vahid Khalajzadeh - University of IowaDavid D GoettschChristoph Beckermann - University of Iowa
- Contributors
- Murat Tiryakioǧlu (Editor)Mark Jolly (Editor)Glenn Byczynski (Editor)
- Resource Type
- Book chapter
- Publication Details
- Shape Casting: 6th International Symposium, pp.35-42
- DOI
- 10.1002/9781119274865.ch5
- Publisher
- John Wiley & Sons, Inc; Hoboken, NJ, USA
- Number of pages
- 8
- Language
- English
- Date published
- 02/10/2016
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196497302771
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