Dislocation detection through harmonic generation

B. T. Reinhardt, M. Kropf, K. Boudraeu, Manton John Guers, Bernhard R. Tittmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A fundamental goal of ultrasonic nondestructive evaluation is to characterize material defects before failure. During material fatigue, dislocations tend to nucleate, becoming sources of stress concentration. Eventually, cracks start to form and lead to material failure. Recent research has indicated that nonlinear harmonic generation can be used to distinguish between materials of high and low dislocation densities. This research reports nonlinear harmonic generation measurements to distinguish between those areas of high and low dislocation densities in copper bars. The copper bars were subjected to flexural fatigue. Periodic scans were taken in order to track dislocation development during the fatigue life of the material. We show that this technique provides improved early detection for critical components of failure.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Number of pages6
StatePublished - Apr 1 2010
Event36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Kingston, RI, United States
Duration: Jul 26 2009Jul 31 2009


Other36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
Country/TerritoryUnited States
CityKingston, RI

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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