Radiography of light alloy castings using radioactive isotopes

One of the most important causes for setback of nation's economy is loss of productive elements as a result of avoidable accidents. Particularly in a complicated field such as aircraft production, failure of a single part may cause the loss of men, money and materials which are all productive elements. To reduce such a loss, to increase productivity and to earn customer confidence, it is absolutely necessary to find out tools for quality assurance of defect prone castings. Radioactive isotopes can judiciously be employed inspite of its lower contrast, provided the radiographer understands : (1) the various types of defects characteristics of each alloy and (2) the limitations and possibilities of detecting such defects by this method. (author)