Application of Evolution Algorithms to Aluminium Alloy Casting Porosity Prediction Function

Abstract:

Porosity is a major problem occurring in aluminium alloy casting. During the process of solidification, alloy would shrink and emit dissolving hydrogen causing porosity formation inside the solidified part which leads to mechanical properties degradation. This research aims to produce a formula to explain the resulting porosity with the initial chemical compositions and cooling rate. A mathematic model is, at first, inferred from previous researches to be a template function. Differential Evolution is utilized to generate inner polynomial parts and to find appropriate coefficients to experimental data obtained from other publications. The optimized function promisingly shows good fit to the problem domain demonstrating that the resulting function is an efficient model to explain porosity formation behaviour.

• Periodical: Applied Mechanics and Materials (Volumes 799-800)
• Pages: 372-376
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.799-800.372
• Online since: October 2015
• Authors: Natnapat Gaviphatt*, Prabhas Chongstitvatana, Chedtha Puncreobutr
• Keywords: Aluminium Alloys, Differential Evolution, Genetic Algorithm, Porosity

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