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Characterization Of L80 Steel Microstructure Using Ultrasonic Measurements

Author: J. Kennedy, J.B. Wiskel, H. Henein, D.G. Ivey   |   Document Download   |   Product code: ZCP2014MSTP0327

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Classified as: Carbon and Alloy Steels Crystal Structures ...more

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Traditionally, ultrasonic testing (UT) has been used for crack and/or flaw detection in pipeline steels and welds; however, the work presented in this paper explores using this technique to characterize the microstructure of an L80 steel. Specifically, the ultrasound velocity was measured in a series of L80 steel samples heat treated to form a variety of microstructures (e.g., pearlite, ferrite and martensite). The ultrasound velocity was measurably lower (3190 m/s) for microstructures that contained martensite versus a predominantly ferritic microstructure (3260 m/s). In addition, the interaction of the ultrasonic waves with the steel microstructure was modeled using the Christoffel equation of wave motion. A comparison between the model predictions and experimental results are presented and discussed.
  • From: Materials Science & Technology 2014 (MS&T)
  • Publisher: TMS
  • Published: 2014
  • Pages: 8