@inproceedings{7891764dea394c1881e1f8b354a72433,
title = "Experimental characterization of creep damage in a welded steel pipe section using a nonlinear ultrasonic technique",
abstract = "To ensure the long and safe operation of power plants, structural parts must be monitored for damage. In the case of welded steel pipes that maintain high pressures in high temperature environments, a common cause of failure is creep damage. Severe creep damage often occurs in the heat affected zone (HAZ). Previous research has shown that nonlinear acoustic techniques are sensitive to creep damage. This research develops a procedure using longitudinal waves to obtain the nonlinearity parameter on a welded steel pipe in order to detect creep damage. These experiments show higher levels of nonlinearity in the HAZ. Additional measurements on an undamaged, welded sample suggest that the high nonlinearity is due to creep (stresses at a high temperature for extended time) damage and not welding (high temperature only for a short time).",
keywords = "Creep Damage, Nonlinear Acoustics, Ultrasonic Testing",
author = "C. Ehrlich and Kim, {J. Y.} and Jacobs, {L. J.} and J. Qu and J. Wall",
year = "2012",
doi = "10.1063/1.4716242",
language = "English",
isbn = "9780735410138",
series = "AIP Conference Proceedings",
number = "31",
pages = "292--298",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
edition = "31",
note = "38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE ; Conference date: 17-07-2011 Through 22-07-2011",
}