The Application of Nondestructive Methods for Degradation Evaluation of Modified 9Cr-1Mo Steel

Jong Seo Park; Un Bong Baek; Seung Hoon Nahm; Sang In Han; Song Chun Choi

doi:10.4028/www.scientific.net/KEM.321-323.528

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 321-323The Application of Nondestructive Methods for...

The Application of Nondestructive Methods for Degradation Evaluation of Modified 9Cr-1Mo Steel

Abstract:

The nondestructive evaluation technique for the material degradation is necessary because of the limitation of conventional destructive methods. In this study, an ultrasonic velocity measurement method was attempted for the estimation of the creep damage of degraded modified 9Cr-1Mo steel. The specimens with seven different kinds of aging periods were prepared by an isothermal heat treatment at 690 . The ultrasonic velocity was measured by an immersion method. The correlation between the measured ultrasonic velocity and tensile properties were studied. The ultrasonic velocity has an declining tendency with the increase of heat treatment time. A correlation between the ultrasonic velocity and aging parameter were established, which allows one to estimate the material degradation of modified 9Cr-1Mo steel.

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Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

528-531

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.528

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Online since:

October 2006

Authors:

Jong Seo Park, Un Bong Baek, Seung Hoon Nahm, Sang In Han, Song Chun Choi

Keywords:

Material Degradation, Modified 9Cr-1Mo Steel, Tensile Properties, Ultrasonic Velocity

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References

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