[en] The main task of an NDT engineer is to select the best method, considering the cost-benefit value of different available systems and taking into account the special existing constraints. The aim of the paper is to suggest a tool that will enable characterization of measuring systems. The derivation of the characterization parameters and functions has to be general, i.e., suitable for all possible measuring methods, independent of their principle of operation. Quite often the properties measured during the NDT procedure are not the wanted ones, but there must be a correlation between the measured property and the performance of the product. One has to bear in mind that the ultimate choice between systems is not, in practice, just based on the mathematical optimization approach that is presented. Factors like cost-benefit, availability of trained manpower, service, real-time information, weight, volume, etc., may be crucial problems, and they may well dictate the final selection

[en] Topics discussed include: high-pressure diamond cell work; x-ray fluorescence analysis; shroud of turin; laser fusion target inspection; and scanning electron microscope. Organization charts for the M-1 group are included

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[en] Of the particles emitted from radioactive nuclei, the positively charged beta rays or positrons are among the least known, yet they have some remarkable properties, since they provide by far the most easily accessible examples of anti-matter. Over the last few years it has become clear that the particular combination of conventional and unconventional properties possessed by positrons makes them especially valuable as probes of microscopic and atomic scale imperfections in metals, and their use for this purpose in metallurgy is now well established. The chapter summarizes the properties concerned, considers the observational techniques required to exploit them, and presents examples of such studies, with the object of showing how they are beginning to contribute to some areas of nondestructive testing. In particular, positron annihilation shows promise as a method for detecting deformation, creep and fatigue damage in metals and alloys, where there is a dearth of adequate techniques

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[en] The standard supersedes the December 1974 issue of RDT F 3-6T and incorporates those changes to that issue of the standard that were approved for publication as Amendment 1

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