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Thermomechanical behavior of resin bonded foundry sand cores during casting

Abstract : Foundry sand cores and bonding resin behaviors were investigated between room temperature and 450 °C. A series of experiments including DMA, DSC, TGA, dilatometry, tensile tests and creep tests were conducted on the resin. Sand core samples were tested under four-point bending loading with various thermomechanical histories and the tension-compression asymmetry was investigated by turning upside down the specimen. The deformation mechanisms as well as the effect of temperature, heating rate and applied load were studied. The microstructure variation-resin thermal aging relationship was discussed and established. It was found that the evolution of resin properties due to both thermal degradation and crosslinking depending on temperature history has a direct impact on core deformation.
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Submitted on : Friday, May 5, 2017 - 3:02:48 PM
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Hiba Bargaoui, Farida Azzouz, Delphine Thibault, Georges Cailletaud. Thermomechanical behavior of resin bonded foundry sand cores during casting. Journal of Materials Processing Technology, Elsevier, 2017, 246, pp.30-41. ⟨10.1016/j.jmatprotec.2017.03.002⟩. ⟨hal-01518849⟩



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