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


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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.



Advanced Materials Research (Volumes 26-28)

Edited by:

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




J. K. Kim et al., "The Evaluation of the Fatigue Life in Arc Welded Parts of SAPH45 Steels Using an Acoustic Emission Method", Advanced Materials Research, Vols. 26-28, pp. 1227-1230, 2007

Online since:

October 2007




[1] M.E. Biancolini, C. Brutti, G. Paparo and A. Zanini: Int. J. Fatigue Vol. 28 (2006), p.1820.

[2] G. Drummond, J.F. Watson and P.P. Acarney: NDT&E Int. Vol. 40 (2007), p.94.

[3] K.H. Oh, C.K. Jung, Y.C. Yang and K.S. Han: Key Engng. Mat. Vol. 261 (2004), p.1325.

[4] S.K. Singh, K. Srinivasan and D. Chakraborty: Mat. and Design Vol. 24 (2003), p.471.

[5] Japan Society of Mechanical Engineers: Standard Practice for Statistical Analysis of linear or linearized stress- life(S-N) and strain life fatigue data JSME S 002 (JSME, Japan 1994). Axial loading Bending loading 1%fP = 50%fP = 99%fP = 1%fP = 50%fP = 99%fP = Crack initiation life (cycles) 32, 500 85, 100 222, 400 44, 200 119, 700 323, 500.

DOI: 10.7717/peerj.2172/supp-9

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