Material specific creep damage detection by time-of-flight measurementsFunded under: JRC-ADVMAT 1C
For a reliable safety assessment of pressurised components operating at elevated temperatures, it is important to know the microstructural damage of the material incurred under these loading conditions. Cavities and microcracks on grain boundaries are the most common form of defects present. Ultrasonic time-of-flight measurements have proved very promising in determining the current damage state in a non-destructive way. This paper describes an ultrasonic investigation carried out on the iron-based Alloy 800H. The results obtained were compared with earlier tests on the austenitic steel AMCR0033. These two examples are used to illustrate how the successful use of the ultrasonic velocity measurements depends on the material and, particularly, on the type of material degradation due to creep deformation.
Bibliographic Reference: Paper presented: Les Progrès dans les Méthodes d'Investigation des Métaux, Saint Etienne (FR), Nov. 20-21, 1991
Availability: Available from (1) as Paper EN 36470 ORA
Record Number: 199111553 / Last updated on: 1994-12-02
Original language: en
Available languages: en