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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 44 (1993), S. 342-344 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation into the effusion behaviour of hydrogen in quenched and tempered steelsThe effusion behaviour of hydrogen in quenched and tempered steel was investigated by means of the ultrasonic damping technique (USDT). The material 34CrMo4 was used in three tempering conditions (I: 850 N/mm2, II: 1000 N/mm2 and III: 1200 N/mm2). The influence of effusion behaviour of different media (imidazole, imidazolidine and EDTA) in dependence of the exposure time was determined. Additionally volumetric permeation experiments and the determination of the hydrogen embrittlement-index (VH) were performed.The results revealed, that the USDT basically is suitable for the quantitative, non destructive measurement of hydrogen in quenched and tempered steel.The investigations showed a significant influence of different parameters on the reproducibility of the results. Especially the influence of media, the microstructure and the coupling of the testing button on the material surface are important for the reliability of the results by using the USDT under practical conditions.
    Notes: Mit Hilfe der Ultraschalldämpfungsmessung (USD) als zerstörungsfreies Prüfverfahren wurde der Einfluß des Auslagerungsmediums auf das Effusionsverhalten des Wasserstoffs in Stahlproben untersucht. Die Auslagerungsmedien waren Imidazol, Imidazolidin, EDTA und Wasser. Die Proben aus dem Vergütungsstahl 34CrMo4 lagen in den drei Vergütungsstufen I (RmI: 850 N/mm2), II (RmII: 1000 N/mm2) und III (RmIII: 1200 N/mm2) vor. Zur Überprüfung der Ergebnisse aus der USD wurden der Wasserstoffversprödungsindex VH ermittelt und volumetrische Permeationsversuche durchgeführt.Die Untersuchungsergebnisse lassen darauf schließen, daß die USD prinzipiell zur quantitativen Erfassung von Wasserstoff geeignet ist.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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