Untersuchung über den Einfluß des Prüfpotentials auf das Korrosionsverhalten eines lösungsgeglühten und anschließend bis zu 100 h bei 550 °C angelassenen Stahls mit rd. 0,05 % C, 18 % Cr und 10 % Ni. Deutung der Korrosionsstrom‐Zeit‐Kurven und des Glühdauer‐Potential‐Schaubildes. Beurteilung der Prüfung in siedender Kupfersulfat‐Schwefelsäure‐Lösung.
The critical specimen thickness up to which the Cliff-Lorimer method can be used without additional corrections was measured on some steels and nickel-base alloys for soft x-rays with line energies between 1 and 3 keV. The critical thickness values measured are 50 om at 1 keV and 450 to 500 nm at 3 keV. These resdts indicated that verification of the calibration measurements nsed for determining the correction factors was necessary in the case of soft radiation. The measurements led to a further optimization of the parameters in the equation nsed for calculating the ionization cross-seetion.The published equations for absorption correction, which becomes necessary when the critical specimen thickness is exceeded, were found to lead to an overcorrection in the case of very thin foils and an insufficient correction in the case of thicker specimens. However, it is only of significance if the specimens are very thick or errors less than 5% are aimed for.
Received
Licht‐ und elektronenoptische Gefügeuntersuchungen an austenitischen Chrom‐Nickel‐Stählen über den Einfluß des Lösungsglühens und einer nachfolgenden Anlaßbehandlung bis zu 10 000 h bei 450 bis 800° C auf Ausscheidungsvorgänge und ihre Beziehung zur interkristallinen Korrosion. Auswirkung eines Zusatzes von Niob und Tantal. Deutung der Zeit‐Temperatur‐Kornzerfall‐Schaubilder.
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