Corrosion fatigue characteristics in the weld of multi-pass welded A106 Gr B steel pipe |
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Authors: | Email author" target="_blank">Dongho?BaeEmail author Chul?Han?Kim |
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Affiliation: | (1) School of Mechanical Engineering, Sungkyunkwan University, 440-746 Suwon, Kyonggi- do, Korea;(2) KNR System. Inc., H wasting, 445-973 Kyonggi- do, Korea |
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Abstract: | In order to investigate the corrosion fatigue characteristics in the weld of multi-pass welded A106 Gr B steel pipe, corrosion
fatigue tests were performed under the various stress ratios and 3.5 wt% NaCl solution at room temperature. The corrosion
fatigue characteristic curves were represented using crack closure concept. The obtained results are as follows ; when the
load frequency is 1.0 Hz, the crack opening point is transited in the region of Kmax=20-32 MPa-msu1/2. In the low stress intensity factor range, the crack opening point is higher than that in air. However,
in the high stress intensity factor range, it is lower than that in air. In the cases of 0.1 Hz and 0.01 Hz, the crack opening
point gradually decreases to K(min) with Kmax increase. |
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Keywords: | Corrosion Fatigue Multi-pass Weld Crack Closer Concept Crack Opening Point Stress Intensity Factor Electro-chemical Corrosion Characteristics Corrosion Rate |
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