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The Evaluation of the Fatigue Life in Arc Welded Parts of SAPH45 Steels Using an Acoustic Emission Method

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Abstract:

The fatigue life in arc welded parts of the chassis component of SAPH45 steel in automobile is affected by various defects and residual stress due to welding. Moreover, it is hard to measure directly the crack initiation length of the welded part in chassis component due to the complicated geometric shape. Therefore, to assure the safety of vehicles, it is necessary to evaluate the crack initiation life by using a non-destructive technique (NDT). In this study, the acoustic emission measurement was adapted to monitor the crack initiation of the welded part during the fatigue test. The crack initiation length was verified by a computerized image processing system under stroboscopic light illumination. Besides, to consider the variation of fatigue data, the crack initiation life was statistically evaluated.

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Periodical:

Advanced Materials Research (Volumes 26-28)

Pages:

1227-1230

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.1227

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Online since:

October 2007

Authors:

Jung Kyu Kim, Cheon Soo Jang, Chul Su Kim

Keywords:

Acoustic Emission Method, ARC Welded Part, Fatigue Life, Heat Affected Zone (HAZ)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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References

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DOI: 10.3327/taesj2002.3.106

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