Computer simulation of shrinkage related defects in metal castings - a review

Simulation of shrinkage related defects in shape castings has been extensively studied because of its potential contribution to quality improvement of cast products. Although the location of macroshrinkage can be estimated rather easily by present solidification models, it is still difficult to quan...

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Bibliographic Details
Published inInternational journal of cast metals research (Online) Vol. 18; no. 3; pp. 129 - 143
Main Author Stefanescu, D. M.
Format Journal Article
LanguageEnglish
Published Taylor & Francis 01.03.2005
Subjects
COMPUTER SIMULATION
CRITERION FUNCTIONS
POROSITY
SHRINKAGE DEFECTS
THERMAL MODELLING
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Summary:Simulation of shrinkage related defects in shape castings has been extensively studied because of its potential contribution to quality improvement of cast products. Although the location of macroshrinkage can be estimated rather easily by present solidification models, it is still difficult to quantify its size. In spite of concentrated efforts and numerous claims of success, microporosity prediction is still a subject looking for a solution. After a succinct analysis of the physics of the problem, this paper reviews the various approaches to modelling macro- and micro-porosity evolution, from simple thermal models and criterion functions, to channel and porous medium models based on hydrogen diffusion, and finally to a most recent model based on oxide entrapment.
ISSN:1364-0461
1743-1336
DOI:10.1179/136404605225023018