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Corrosion Fatigue Characteristics in the Weld of Multi-Pass Welded A106 Gr B Steel Pipe  

Bae, Dong-Ho (School of Mechanical Engineering, Sungkyunkwan University)
Kim, Chul-Han (KNR System, Inc.)
Publication Information
Journal of Mechanical Science and Technology / v.18, no.1, 2004 , pp. 114-121 More about this Journal
Abstract
In order to investigate the corrosion fatigue characteristics in the weld of multi-pass welded A 106 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 $K_{max}$=20∼32 MPaㆍ $m^{1}$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 $K_{max}$ increase.rease.
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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Times Cited By KSCI : 1  (Citation Analysis)
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