ULTRASONIC VELOCITY AND ATTENUATION MEASUREMENTS ON CREEPED SPECIMENS
In the paper the results are reported, of a research aiming to verify the applicability possibilities of ultrasonic techniques for the damage degree assessment of creeping components. On ferritic steel specimens, subjected to interrupted creep tests, measurements have been performed of both longitudinal and transverse ultrasonic waves velocity and attenuation, at frequencies ranging from 1 to 30 MHz. The obtained result show, for both parameters, a sharp initial increase vs the creep time, then the attainment of a maximum and, lastly, a decrease. An attempt is given for the interpretation of the found behaviour limits and possibilities are also discussed for the employment of the results in the non-destructive assessment of creep damage in high temperature plant components.
Bibliographic Reference: 3RD EUROPEAN CONFERENCE ON NON-DESTRUCTIVE TESTING, FIRENZE (ITALY), OCT. 15-18, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31506 ORA
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Record Number: 1989123034000 / Last updated on: 1987-01-01
Available languages: en