Ultrasonic Nondestructive Evaluation of the Creep Damaged IN738LC Superalloy

Abstract:

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It was attempted to evaluate nondestructively the creep damaged IN738LC Ni based superalloys with different degree of rafting using ultrasonic wave. Microstructural parameters (length and width of γ' precipitates) and ultrasonic attenuation were measured in order to clarify the relationship between them. Both the mean length of γ' precipitates and the ultrasonic attenuation increased with creep time. Ultrasonic attenuation was found to have a linear correlation with the mean length of γ' precipitates. It is suggested that the ultrasonic attenuation can be used as a potential nondestructive parameter for assessing the degree of creep damage of IN738LC superalloy.

Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi

Pages:

569-572

DOI:

10.4028/www.scientific.net/MSF.449-452.569

Citation:

J. W. Byeon et al., "Ultrasonic Nondestructive Evaluation of the Creep Damaged IN738LC Superalloy ", Materials Science Forum, Vols. 449-452, pp. 569-572, 2004

Online since:

March 2004

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Price:

$35.00

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