Fatigue Life Evaluation of Pipe Welds in Power Plant Using Advanced Nondestructive Methods

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The objective of this study is to estimate the feasibility of advanced nondestructive method(X-ray diffraction, AE(acoustic emission) and BN(barkhausen noise)measurement application for fatigue life evaluation of the high-temperature pipeline steel such as main steam pipe etc. in power plant. In this study, various nondestructive tests using various types of specimen simulated low cycle fatigue damage were performed in order to analyze fatigue properties when fatigue damage conditions become various stages such as 1/4, 1/2 and 3/4 of fatigue life, respectively. As a result of X-ray diffraction tests for specimens simulated fatigue damages, we conformed that the variation of the full width at half maximum intensity decreased in proportion to the increase of fatigue life ratio. And also, AE and BN signal due to fatigue damage has linear relationship with fatigue life ratio algebraically. From this relationship, it was suggested that direct expectation of the life consumption rate was feasible.

Info:

Periodical:

Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1251-1254

Citation:

S. G. Lee et al., "Fatigue Life Evaluation of Pipe Welds in Power Plant Using Advanced Nondestructive Methods", Advanced Materials Research, Vols. 26-28, pp. 1251-1254, 2007

Online since:

October 2007

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$38.00

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[2] Sanjay Rai: Characterization of Low Cycle Fatigue Damage in 9Cr-1Mo Ferritic Steel using X-ray Diffraction Technique, International Journal of Pressure Vessels and Piping 76 (1999), pp.275-281.

DOI: https://doi.org/10.1016/s0308-0161(98)00140-9

[3] Y. Mori and T. Kisi: Degradation, Damage and Non-destructive Evaluation, Welding Technique, Vol. 34 No. 10, Japan(1986) p.24.

[4] Chennupati Jagadish, Lynann Clapham and David L. Atherton: The Effect of Stress and Magnetic Field Orientation on Surface Barkhausen Noise in Pipeline Steel, IEEE Trans. on Magnetics, Vol. 26, No. 1(1990), pp.262-265.

DOI: https://doi.org/10.1109/20.50551

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