Experimental characterization of creep damage in a welded steel pipe section using a nonlinear ultrasonic technique

C. Ehrlich, J. Y. Kim, L. J. Jacobs, J. Qu, J. Wall

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

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).

Original languageEnglish
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Pages292-298
Number of pages7
Edition31
DOIs
StatePublished - 2012
Event38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Burlington, VT, United States
Duration: 17 Jul 201122 Jul 2011

Publication series

NameAIP Conference Proceedings
Number31
Volume1430
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
Country/TerritoryUnited States
CityBurlington, VT
Period17/07/1122/07/11

Keywords

  • Creep Damage
  • Nonlinear Acoustics
  • Ultrasonic Testing

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