Abstract
AT a demonstration given in London recently, the potentialities of the 'Hyglo' system of detecting flaws in non-ferrous metals and other materials were demonstrated. From its name it will be recognized as an application of the well-known phenomenon of fluorescence to the illumination of flaws, cracks, inclusions and porosity, which are thereby rendered quickly noticeable when examined under the ultraviolet lamp. This particular system, is specially notable, from the point of view of the user or potential user, by reason of the simplicity, rapidity and certainty of its operation, and of the ease with which it can be introduced into a scheme of mass production. The articles to be examined are first dipped for about two minutes in a solution containing the fluorescent material and a substance which at its boiling point produces a vapour to quench fluorescence on the surface. By preparing a sufficient number of articles at the end of each day, the work of inspection can be started at once in the morning and can proceed without interruption. When the articles so treated are brought under an ultra-violet lamp, the fluorescent material which has penetrated the cracks, spongy places or other flaws glows strongly and defective articles can be recognized at once.
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Crack Detection in Non-Ferrous Materials. Nature 151, 555–556 (1943). https://doi.org/10.1038/151555b0
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DOI: https://doi.org/10.1038/151555b0