Ultrasonic attenuation in pearlitic steel

Hualong Du, Joseph A. Turner

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Expressions for the attenuation coefficients of longitudinal and transverse ultrasonic waves are developed for steel with pearlitic microstructure. This type of lamellar duplex microstructure influences attenuation because of the lamellar spacing. In addition, longitudinal attenuation measurements were conducted using an unfocused transducer with 10 MHz central frequency on the cross section of a quenched railroad wheel sample. The dependence of longitudinal attenuation on the pearlite microstructure is observed from the changes of longitudinal attenuation from the quenched tread surface to deeper locations. The results show that the attenuation value is lowest and relatively constant within the quench depth, then increases linearly. The experimental results demonstrate a reasonable agreement with results from the theoretical model. Ultrasonic attenuation provides an important non-destructive method to evaluate duplex microstructure within grains which can be implemented for quality control in conjunction with other manufacturing processes.

Original languageEnglish (US)
Pages (from-to)882-887
Number of pages6
JournalUltrasonics
Volume54
Issue number3
DOIs
StatePublished - Mar 1 2014

Keywords

  • Lamellar duplex microstructure
  • Pearlitic steel
  • Ultrasonic attenuation
  • Ultrasonic backscatter

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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