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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 39 (1988), S. 416-423 
    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: Stress corrosion cracking of Inconel 600 tubing: Influence of thermal treatment, NaOH concentration and temperatureA study has been performed concerning the role of thermal treatments on the SCC behaviour of Inconel 600 tubing in NaOH solutions in the temperature range 315-360°C. An additional investigation was undertaken to establish the effect of the NaOH concentration built-up under magnetite deposits. The changes in the microstructural variables in the four metallurgical conditions studied were indentified by transmission electron microscopy (TEM). C-ring and slow strain rate tests (10-6s-1) yielded identical results. SEM fractographs were additionally taken to reveal the cracking mode. It has been found that thermal treatment improves the SCC resistance in hot caustic solutions; particularly annealing at 650°C for 50 h appeared to impart the maximum improvement of SCC resistance.
    Notes: Eine Unterschung über den Einfluß der Wärmebehandlung auf das SpRK-Verhalten von Rohren aus Inconel 600 in NaOH-Lösungen bei 315 bis 360°C wurde ergänzt durch Untersuchungen über den Einfluß der NaOH-Anreicherung unter Magnetitschichten; die dabei auftretenden Gefügeänderungen wurden mittels TEM nachgewiesen. Versuche mit C-Ringen und mit langsamer Dehnung (slow strain rate, SSR) bei 10-6s-1 Dehngeschwindigkeit führten zu den gleichen Ergebnissen; REM-Untersuchungen wurden zur Beurteilung der Bruchflächen ausgeführt. Dabei zeigte sich, daß Wärmebehandlung die Anfälligkeit für SpRK in Natronlauge bei hohen Temperaturen vermindert; insbesondere scheint die Wärmebehandlung bei 650°C/50h das SpRK-Verhalten besonders wirkungsvoll zu verbessern.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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