Analysis of Porosity and Solid Shrinkage of ASTM B23 Babbitt alloy in Microwave aided Castings

Quality of castings is important for the foundry industries, which depends upon the defects present in the castings. More the proportion of defects, less is their quality. It is always intended to produce defect free castings and in spite of taking lot of precautions, defects arise in casting. Porosity, shrinkage, mismatch, pinholes, blowholes are its some of the common defects. In the present study, microwave aided casting technique was used to produce ASTM B23 tin alloy cylindrical castings. Defects such as solid shrinkage and porosity fraction were considered for the study. It was found that, in microwave castings, the solid shrinkage was 32.88 % less to those produced through conventional casting. Porosity fraction was calculated by using Four-Dimensional X-ray microscope. The results revealed that porosity was 78 % less in microwave specimens.