No abstract available

[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

[en] This invention concerns suction pads for supporting loads. Specifically, the suction pad is part of a pair of pads located at the ends of a bridge forming a vehicle for transporting instruments for the non-destructive testing of a large vessel intended to contain a fuel assembly for a nuclear reactor immersed in a liquid metal coolant. For example, the vehicle is of the type described in the French patent application filed this day under the heading 'Vehicle for transporting instruments for testing against a wall'

[en] The proceedings contain 29 lectures and 43 posters which were presented in Trier at the annual meeting of the DGZfP in May 1990. The contributions report on further development of non-destructive testing methods towards more reliability, both of inspections and with regard to interpretation of the results. (MM)

[en] Short communication

[en] This article presents the commonly used NDE methods in fabrication and manufacturing. These are: the visual examination employed by man; the radiographic examination which uses X-rays; the ultrasonic examination by utilizing ultrasonic waves; the liquid penetrant examination which is the oldest method because it relies on the penetrants' seeping; and the magnetic particle examination detecting ferromagnetic materials. (ISD). 2 figs

[en] Staining method in mineral identification process is based on stains effect on mineral by certain chemical solution. K feldspar stains are characteristically yellow colour, plagioclase is pink or red, cardierite is deep red and muscovite is yellowish, but paragonite is unstained. Sometimes stains depend on rock condition and minerals position on thin section. Furthermore it can be developed to petrofabric studies. (author)

[en] This paper discusses the nondestructive testing (NDT) certification schemes in the following countries: Australia, Bangladesh, China, India, Indonesia, Japan, Korea, Malaysia, Pakistan, Philippines, Singapore, Sri-Lanka, Thailand, Democratic Republic of Vietnam (DRV) and the Democratic Republic of Korea. Also presented are tables on national technical specific qualification titles, qualifications for an examination in various grades and an equivalence table (level I, II, III ISO System). (ELC). 7 tabs.; 1 fig

[en] Short communication

No abstract available