Nonlinear ultrasonic characterization of thermal degradation in ferritic 2.25Cr-1Mo steel

C. S. Kim, Ik Keun Park, Kyung Young Jhang

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The thermal degradation of ferritic 2.25Cr-1Mo steel was characterized using the nonlinear ultrasonic technique for the purpose of structural health monitoring (SHM). An accelerated heat treatment was performed in order to simulate differing levels of thermal degradation. The variation in the ultrasonic nonlinearity was interpreted regarding the microstructural evolution during thermal degradation. The normalized ultrasonic nonlinearity parameter (β/β0) monotonically increased due to the precipitation of equilibrium M6C carbide and the variation in the lattice parameter of M23C6 carbide. Ultrasonic nonlinearity was found to be strongly sensitive to the carbide behavior during thermal degradation of ferritic 2.25Cr-1Mo steel.

Original languageEnglish
Pages (from-to)204-209
Number of pages6
JournalNDT and E International
Volume42
Issue number3
DOIs
StatePublished - 2009 Apr 1

Fingerprint

Steel
thermal degradation
Pyrolysis
ultrasonics
Ultrasonics
steels
carbides
Carbides
nonlinearity
structural health monitoring
Structural health monitoring
Microstructural evolution
Lattice constants
lattice parameters
heat treatment
Heat treatment

Keywords

  • 2.25Cr-1Mo steel
  • Carbide
  • Degradation
  • Health monitoring
  • Ultrasonic nonlinearity

Cite this

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abstract = "The thermal degradation of ferritic 2.25Cr-1Mo steel was characterized using the nonlinear ultrasonic technique for the purpose of structural health monitoring (SHM). An accelerated heat treatment was performed in order to simulate differing levels of thermal degradation. The variation in the ultrasonic nonlinearity was interpreted regarding the microstructural evolution during thermal degradation. The normalized ultrasonic nonlinearity parameter (β/β0) monotonically increased due to the precipitation of equilibrium M6C carbide and the variation in the lattice parameter of M23C6 carbide. Ultrasonic nonlinearity was found to be strongly sensitive to the carbide behavior during thermal degradation of ferritic 2.25Cr-1Mo steel.",
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Nonlinear ultrasonic characterization of thermal degradation in ferritic 2.25Cr-1Mo steel. / Kim, C. S.; Park, Ik Keun; Jhang, Kyung Young.

In: NDT and E International, Vol. 42, No. 3, 01.04.2009, p. 204-209.

Research output: Contribution to journalArticle

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