Usage of a Non-Destructive Testing Technology for Assessment of Porosity in Aluminium Casts Alloys

The assessment of porosity in aluminium casting is the main object to reach the required properties. The determination of amount, size, 3D morphology of casting defect by using a non-destructive (ND) method, especially the computed tomography (CT), is important for assessment casting with complex internal areas that could not be inspected by conventional measurements without failure of the final products. The aim of this study is assessment of bars casted by gravity die casting in to the sand moulds with using the computed tomography. The size, amount and volume of casting defect were assessment by equipment Zeiss Metrotom and software Metrotom OS and VG studio MAX. The results show the influence of the shape of the moulds on the quality of the bars and thus the size, amount and volume of casting defects.